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Editing: image.php
<?php /** * File contains all the administration image manipulation functions. * * @package WordPress * @subpackage Administration */ /** * Crops an image to a given size. * * @since 2.1.0 * * @param string|int $src The source file or Attachment ID. * @param int $src_x The start x position to crop from. * @param int $src_y The start y position to crop from. * @param int $src_w The width to crop. * @param int $src_h The height to crop. * @param int $dst_w The destination width. * @param int $dst_h The destination height. * @param bool|false $src_abs Optional. If the source crop points are absolute. * @param string|false $dst_file Optional. The destination file to write to. * @return string|WP_Error New filepath on success, WP_Error on failure. */ function wp_crop_image( $src, $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_h, $src_abs = false, $dst_file = false ) { $src_file = $src; if ( is_numeric( $src ) ) { // Handle int as attachment ID. $src_file = get_attached_file( $src ); if ( ! file_exists( $src_file ) ) { /* * If the file doesn't exist, attempt a URL fopen on the src link. * This can occur with certain file replication plugins. */ $src = _load_image_to_edit_path( $src, 'full' ); } else { $src = $src_file; } } $editor = wp_get_image_editor( $src ); if ( is_wp_error( $editor ) ) { return $editor; } $src = $editor->crop( $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_h, $src_abs ); if ( is_wp_error( $src ) ) { return $src; } if ( ! $dst_file ) { $dst_file = str_replace( wp_basename( $src_file ), 'cropped-' . wp_basename( $src_file ), $src_file ); } /* * The directory containing the original file may no longer exist when * using a replication plugin. */ wp_mkdir_p( dirname( $dst_file ) ); $dst_file = dirname( $dst_file ) . '/' . wp_unique_filename( dirname( $dst_file ), wp_basename( $dst_file ) ); $result = $editor->save( $dst_file ); if ( is_wp_error( $result ) ) { return $result; } if ( ! empty( $result['path'] ) ) { return $result['path']; } return $dst_file; } /** * Compare the existing image sub-sizes (as saved in the attachment meta) * to the currently registered image sub-sizes, and return the difference. * * Registered sub-sizes that are larger than the image are skipped. * * @since 5.3.0 * * @param int $attachment_id The image attachment post ID. * @return array[] Associative array of arrays of image sub-size information for * missing image sizes, keyed by image size name. */ function wp_get_missing_image_subsizes( $attachment_id ) { if ( ! wp_attachment_is_image( $attachment_id ) ) { return array(); } $registered_sizes = wp_get_registered_image_subsizes(); $image_meta = wp_get_attachment_metadata( $attachment_id ); // Meta error? if ( empty( $image_meta ) ) { return $registered_sizes; } // Use the originally uploaded image dimensions as full_width and full_height. if ( ! empty( $image_meta['original_image'] ) ) { $image_file = wp_get_original_image_path( $attachment_id ); $imagesize = wp_getimagesize( $image_file ); } if ( ! empty( $imagesize ) ) { $full_width = $imagesize[0]; $full_height = $imagesize[1]; } else { $full_width = (int) $image_meta['width']; $full_height = (int) $image_meta['height']; } $possible_sizes = array(); // Skip registered sizes that are too large for the uploaded image. foreach ( $registered_sizes as $size_name => $size_data ) { if ( image_resize_dimensions( $full_width, $full_height, $size_data['width'], $size_data['height'], $size_data['crop'] ) ) { $possible_sizes[ $size_name ] = $size_data; } } if ( empty( $image_meta['sizes'] ) ) { $image_meta['sizes'] = array(); } /* * Remove sizes that already exist. Only checks for matching "size names". * It is possible that the dimensions for a particular size name have changed. * For example the user has changed the values on the Settings -> Media screen. * However we keep the old sub-sizes with the previous dimensions * as the image may have been used in an older post. */ $missing_sizes = array_diff_key( $possible_sizes, $image_meta['sizes'] ); /** * Filters the array of missing image sub-sizes for an uploaded image. * * @since 5.3.0 * * @param array[] $missing_sizes Associative array of arrays of image sub-size information for * missing image sizes, keyed by image size name. * @param array $image_meta The image meta data. * @param int $attachment_id The image attachment post ID. */ return apply_filters( 'wp_get_missing_image_subsizes', $missing_sizes, $image_meta, $attachment_id ); } /** * If any of the currently registered image sub-sizes are missing, * create them and update the image meta data. * * @since 5.3.0 * * @param int $attachment_id The image attachment post ID. * @return array|WP_Error The updated image meta data array or WP_Error object * if both the image meta and the attached file are missing. */ function wp_update_image_subsizes( $attachment_id ) { $image_meta = wp_get_attachment_metadata( $attachment_id ); $image_file = wp_get_original_image_path( $attachment_id ); if ( empty( $image_meta ) || ! is_array( $image_meta ) ) { /* * Previously failed upload? * If there is an uploaded file, make all sub-sizes and generate all of the attachment meta. */ if ( ! empty( $image_file ) ) { $image_meta = wp_create_image_subsizes( $image_file, $attachment_id ); } else { return new WP_Error( 'invalid_attachment', __( 'The attached file cannot be found.' ) ); } } else { $missing_sizes = wp_get_missing_image_subsizes( $attachment_id ); if ( empty( $missing_sizes ) ) { return $image_meta; } // This also updates the image meta. $image_meta = _wp_make_subsizes( $missing_sizes, $image_file, $image_meta, $attachment_id ); } /** This filter is documented in wp-admin/includes/image.php */ $image_meta = apply_filters( 'wp_generate_attachment_metadata', $image_meta, $attachment_id, 'update' ); // Save the updated metadata. wp_update_attachment_metadata( $attachment_id, $image_meta ); return $image_meta; } /** * Updates the attached file and image meta data when the original image was edited. * * @since 5.3.0 * @since 6.0.0 The `$filesize` value was added to the returned array. * @access private * * @param array $saved_data The data returned from WP_Image_Editor after successfully saving an image. * @param string $original_file Path to the original file. * @param array $image_meta The image meta data. * @param int $attachment_id The attachment post ID. * @return array The updated image meta data. */ function _wp_image_meta_replace_original( $saved_data, $original_file, $image_meta, $attachment_id ) { $new_file = $saved_data['path']; // Update the attached file meta. update_attached_file( $attachment_id, $new_file ); // Width and height of the new image. $image_meta['width'] = $saved_data['width']; $image_meta['height'] = $saved_data['height']; // Make the file path relative to the upload dir. $image_meta['file'] = _wp_relative_upload_path( $new_file ); // Add image file size. $image_meta['filesize'] = wp_filesize( $new_file ); // Store the original image file name in image_meta. $image_meta['original_image'] = wp_basename( $original_file ); return $image_meta; } /** * Creates image sub-sizes, adds the new data to the image meta `sizes` array, and updates the image metadata. * * Intended for use after an image is uploaded. Saves/updates the image metadata after each * sub-size is created. If there was an error, it is added to the returned image metadata array. * * @since 5.3.0 * * @param string $file Full path to the image file. * @param int $attachment_id Attachment ID to process. * @return array The image attachment meta data. */ function wp_create_image_subsizes( $file, $attachment_id ) { $imagesize = wp_getimagesize( $file ); if ( empty( $imagesize ) ) { // File is not an image. return array(); } // Default image meta. $image_meta = array( 'width' => $imagesize[0], 'height' => $imagesize[1], 'file' => _wp_relative_upload_path( $file ), 'filesize' => wp_filesize( $file ), 'sizes' => array(), ); // Fetch additional metadata from EXIF/IPTC. $exif_meta = wp_read_image_metadata( $file ); if ( $exif_meta ) { $image_meta['image_meta'] = $exif_meta; } /** * Filters the "BIG image" threshold value. * * If the original image width or height is above the threshold, it will be scaled down. The threshold is * used as max width and max height. The scaled down image will be used as the largest available size, including * the `_wp_attached_file` post meta value. * * Returning `false` from the filter callback will disable the scaling. * * @since 5.3.0 * * @param int $threshold The threshold value in pixels. Default 2560. * @param array $imagesize { * Indexed array of the image width and height in pixels. * * @type int $0 The image width. * @type int $1 The image height. * } * @param string $file Full path to the uploaded image file. * @param int $attachment_id Attachment post ID. */ $threshold = (int) apply_filters( 'big_image_size_threshold', 2560, $imagesize, $file, $attachment_id ); /* * If the original image's dimensions are over the threshold, * scale the image and use it as the "full" size. */ $scale_down = false; $convert = false; if ( $threshold && ( $image_meta['width'] > $threshold || $image_meta['height'] > $threshold ) ) { // The image will be converted if needed on saving. $scale_down = true; } else { // The image may need to be converted regardless of its dimensions. $output_format = wp_get_image_editor_output_format( $file, $imagesize['mime'] ); if ( is_array( $output_format ) && array_key_exists( $imagesize['mime'], $output_format ) && $output_format[ $imagesize['mime'] ] !== $imagesize['mime'] ) { $convert = true; } } if ( $scale_down || $convert ) { $editor = wp_get_image_editor( $file ); if ( is_wp_error( $editor ) ) { // This image cannot be edited. return $image_meta; } if ( $scale_down ) { // Resize the image. This will also convert it if needed. $resized = $editor->resize( $threshold, $threshold ); } elseif ( $convert ) { // The image will be converted (if possible) when saved. $resized = true; } $rotated = null; // If there is EXIF data, rotate according to EXIF Orientation. if ( ! is_wp_error( $resized ) && is_array( $exif_meta ) ) { $resized = $editor->maybe_exif_rotate(); $rotated = $resized; // bool true or WP_Error } if ( ! is_wp_error( $resized ) ) { /* * Append "-scaled" to the image file name. It will look like "my_image-scaled.jpg". * This doesn't affect the sub-sizes names as they are generated from the original image (for best quality). */ if ( $scale_down ) { $saved = $editor->save( $editor->generate_filename( 'scaled' ) ); } elseif ( $convert ) { // Pass an empty string to avoid adding a suffix to converted file names. $saved = $editor->save( $editor->generate_filename( '' ) ); } else { $saved = $editor->save(); } if ( ! is_wp_error( $saved ) ) { $image_meta = _wp_image_meta_replace_original( $saved, $file, $image_meta, $attachment_id ); // If the image was rotated update the stored EXIF data. if ( true === $rotated && ! empty( $image_meta['image_meta']['orientation'] ) ) { $image_meta['image_meta']['orientation'] = 1; } } else { // TODO: Log errors. } } else { // TODO: Log errors. } } elseif ( ! empty( $exif_meta['orientation'] ) && 1 !== (int) $exif_meta['orientation'] ) { // Rotate the whole original image if there is EXIF data and "orientation" is not 1. $editor = wp_get_image_editor( $file ); if ( is_wp_error( $editor ) ) { // This image cannot be edited. return $image_meta; } // Rotate the image. $rotated = $editor->maybe_exif_rotate(); if ( true === $rotated ) { // Append `-rotated` to the image file name. $saved = $editor->save( $editor->generate_filename( 'rotated' ) ); if ( ! is_wp_error( $saved ) ) { $image_meta = _wp_image_meta_replace_original( $saved, $file, $image_meta, $attachment_id ); // Update the stored EXIF data. if ( ! empty( $image_meta['image_meta']['orientation'] ) ) { $image_meta['image_meta']['orientation'] = 1; } } else { // TODO: Log errors. } } } /* * Initial save of the new metadata. * At this point the file was uploaded and moved to the uploads directory * but the image sub-sizes haven't been created yet and the `sizes` array is empty. */ wp_update_attachment_metadata( $attachment_id, $image_meta ); $new_sizes = wp_get_registered_image_subsizes(); /** * Filters the image sizes automatically generated when uploading an image. * * @since 2.9.0 * @since 4.4.0 Added the `$image_meta` argument. * @since 5.3.0 Added the `$attachment_id` argument. * * @param array $new_sizes Associative array of image sizes to be created. * @param array $image_meta The image meta data: width, height, file, sizes, etc. * @param int $attachment_id The attachment post ID for the image. */ $new_sizes = apply_filters( 'intermediate_image_sizes_advanced', $new_sizes, $image_meta, $attachment_id ); return _wp_make_subsizes( $new_sizes, $file, $image_meta, $attachment_id ); } /** * Low-level function to create image sub-sizes. * * Updates the image meta after each sub-size is created. * Errors are stored in the returned image metadata array. * * @since 5.3.0 * @access private * * @param array $new_sizes Array defining what sizes to create. * @param string $file Full path to the image file. * @param array $image_meta The attachment meta data array. * @param int $attachment_id Attachment ID to process. * @return array The attachment meta data with updated `sizes` array. Includes an array of errors encountered while resizing. */ function _wp_make_subsizes( $new_sizes, $file, $image_meta, $attachment_id ) { if ( empty( $image_meta ) || ! is_array( $image_meta ) ) { // Not an image attachment. return array(); } // Check if any of the new sizes already exist. if ( isset( $image_meta['sizes'] ) && is_array( $image_meta['sizes'] ) ) { foreach ( $image_meta['sizes'] as $size_name => $size_meta ) { /* * Only checks "size name" so we don't override existing images even if the dimensions * don't match the currently defined size with the same name. * To change the behavior, unset changed/mismatched sizes in the `sizes` array in image meta. */ if ( array_key_exists( $size_name, $new_sizes ) ) { unset( $new_sizes[ $size_name ] ); } } } else { $image_meta['sizes'] = array(); } if ( empty( $new_sizes ) ) { // Nothing to do... return $image_meta; } /* * Sort the image sub-sizes in order of priority when creating them. * This ensures there is an appropriate sub-size the user can access immediately * even when there was an error and not all sub-sizes were created. */ $priority = array( 'medium' => null, 'large' => null, 'thumbnail' => null, 'medium_large' => null, ); $new_sizes = array_filter( array_merge( $priority, $new_sizes ) ); $editor = wp_get_image_editor( $file ); if ( is_wp_error( $editor ) ) { // The image cannot be edited. return $image_meta; } // If stored EXIF data exists, rotate the source image before creating sub-sizes. if ( ! empty( $image_meta['image_meta'] ) ) { $rotated = $editor->maybe_exif_rotate(); if ( is_wp_error( $rotated ) ) { // TODO: Log errors. } } if ( method_exists( $editor, 'make_subsize' ) ) { foreach ( $new_sizes as $new_size_name => $new_size_data ) { $new_size_meta = $editor->make_subsize( $new_size_data ); if ( is_wp_error( $new_size_meta ) ) { // TODO: Log errors. } else { // Save the size meta value. $image_meta['sizes'][ $new_size_name ] = $new_size_meta; wp_update_attachment_metadata( $attachment_id, $image_meta ); } } } else { // Fall back to `$editor->multi_resize()`. $created_sizes = $editor->multi_resize( $new_sizes ); if ( ! empty( $created_sizes ) ) { $image_meta['sizes'] = array_merge( $image_meta['sizes'], $created_sizes ); wp_update_attachment_metadata( $attachment_id, $image_meta ); } } return $image_meta; } /** * Copy parent attachment properties to newly cropped image. * * @since 6.5.0 * * @param string $cropped Path to the cropped image file. * @param int $parent_attachment_id Parent file Attachment ID. * @param string $context Control calling the function. * @return array Properties of attachment. */ function wp_copy_parent_attachment_properties( $cropped, $parent_attachment_id, $context = '' ) { $parent = get_post( $parent_attachment_id ); $parent_url = wp_get_attachment_url( $parent->ID ); $parent_basename = wp_basename( $parent_url ); $url = str_replace( wp_basename( $parent_url ), wp_basename( $cropped ), $parent_url ); $size = wp_getimagesize( $cropped ); $image_type = $size ? $size['mime'] : 'image/jpeg'; $sanitized_post_title = sanitize_file_name( $parent->post_title ); $use_original_title = ( ( '' !== trim( $parent->post_title ) ) && /* * Check if the original image has a title other than the "filename" default, * meaning the image had a title when originally uploaded or its title was edited. */ ( $parent_basename !== $sanitized_post_title ) && ( pathinfo( $parent_basename, PATHINFO_FILENAME ) !== $sanitized_post_title ) ); $use_original_description = ( '' !== trim( $parent->post_content ) ); $attachment = array( 'post_title' => $use_original_title ? $parent->post_title : wp_basename( $cropped ), 'post_content' => $use_original_description ? $parent->post_content : $url, 'post_mime_type' => $image_type, 'guid' => $url, 'context' => $context, ); // Copy the image caption attribute (post_excerpt field) from the original image. if ( '' !== trim( $parent->post_excerpt ) ) { $attachment['post_excerpt'] = $parent->post_excerpt; } // Copy the image alt text attribute from the original image. if ( '' !== trim( $parent->_wp_attachment_image_alt ) ) { $attachment['meta_input'] = array( '_wp_attachment_image_alt' => wp_slash( $parent->_wp_attachment_image_alt ), ); } $attachment['post_parent'] = $parent_attachment_id; return $attachment; } /** * Generates attachment meta data and create image sub-sizes for images. * * @since 2.1.0 * @since 6.0.0 The `$filesize` value was added to the returned array. * @since 6.7.0 The 'image/heic' mime type is supported. * * @param int $attachment_id Attachment ID to process. * @param string $file Filepath of the attached image. * @return array Metadata for attachment. */ function wp_generate_attachment_metadata( $attachment_id, $file ) { $attachment = get_post( $attachment_id ); $metadata = array(); $support = false; $mime_type = get_post_mime_type( $attachment ); if ( 'image/heic' === $mime_type || ( preg_match( '!^image/!', $mime_type ) && file_is_displayable_image( $file ) ) ) { // Make thumbnails and other intermediate sizes. $metadata = wp_create_image_subsizes( $file, $attachment_id ); } elseif ( wp_attachment_is( 'video', $attachment ) ) { $metadata = wp_read_video_metadata( $file ); $support = current_theme_supports( 'post-thumbnails', 'attachment:video' ) || post_type_supports( 'attachment:video', 'thumbnail' ); } elseif ( wp_attachment_is( 'audio', $attachment ) ) { $metadata = wp_read_audio_metadata( $file ); $support = current_theme_supports( 'post-thumbnails', 'attachment:audio' ) || post_type_supports( 'attachment:audio', 'thumbnail' ); } /* * wp_read_video_metadata() and wp_read_audio_metadata() return `false` * if the attachment does not exist in the local filesystem, * so make sure to convert the value to an array. */ if ( ! is_array( $metadata ) ) { $metadata = array(); } if ( $support && ! empty( $metadata['image']['data'] ) ) { // Check for existing cover. $hash = md5( $metadata['image']['data'] ); $posts = get_posts( array( 'fields' => 'ids', 'post_type' => 'attachment', 'post_mime_type' => $metadata['image']['mime'], 'post_status' => 'inherit', 'posts_per_page' => 1, 'meta_key' => '_cover_hash', 'meta_value' => $hash, ) ); $exists = reset( $posts ); if ( ! empty( $exists ) ) { update_post_meta( $attachment_id, '_thumbnail_id', $exists ); } else { $ext = '.jpg'; switch ( $metadata['image']['mime'] ) { case 'image/gif': $ext = '.gif'; break; case 'image/png': $ext = '.png'; break; case 'image/webp': $ext = '.webp'; break; } $basename = str_replace( '.', '-', wp_basename( $file ) ) . '-image' . $ext; $uploaded = wp_upload_bits( $basename, '', $metadata['image']['data'] ); if ( false === $uploaded['error'] ) { $image_attachment = array( 'post_mime_type' => $metadata['image']['mime'], 'post_type' => 'attachment', 'post_content' => '', ); /** * Filters the parameters for the attachment thumbnail creation. * * @since 3.9.0 * * @param array $image_attachment An array of parameters to create the thumbnail. * @param array $metadata Current attachment metadata. * @param array $uploaded { * Information about the newly-uploaded file. * * @type string $file Filename of the newly-uploaded file. * @type string $url URL of the uploaded file. * @type string $type File type. * } */ $image_attachment = apply_filters( 'attachment_thumbnail_args', $image_attachment, $metadata, $uploaded ); $sub_attachment_id = wp_insert_attachment( $image_attachment, $uploaded['file'] ); add_post_meta( $sub_attachment_id, '_cover_hash', $hash ); $attach_data = wp_generate_attachment_metadata( $sub_attachment_id, $uploaded['file'] ); wp_update_attachment_metadata( $sub_attachment_id, $attach_data ); update_post_meta( $attachment_id, '_thumbnail_id', $sub_attachment_id ); } } } elseif ( 'application/pdf' === $mime_type ) { // Try to create image thumbnails for PDFs. $fallback_sizes = array( 'thumbnail', 'medium', 'large', ); /** * Filters the image sizes generated for non-image mime types. * * @since 4.7.0 * * @param string[] $fallback_sizes An array of image size names. * @param array $metadata Current attachment metadata. */ $fallback_sizes = apply_filters( 'fallback_intermediate_image_sizes', $fallback_sizes, $metadata ); $registered_sizes = wp_get_registered_image_subsizes(); $merged_sizes = array_intersect_key( $registered_sizes, array_flip( $fallback_sizes ) ); // Force thumbnails to be soft crops. if ( isset( $merged_sizes['thumbnail'] ) && is_array( $merged_sizes['thumbnail'] ) ) { $merged_sizes['thumbnail']['crop'] = false; } // Only load PDFs in an image editor if we're processing sizes. if ( ! empty( $merged_sizes ) ) { $editor = wp_get_image_editor( $file ); if ( ! is_wp_error( $editor ) ) { // No support for this type of file. /* * PDFs may have the same file filename as JPEGs. * Ensure the PDF preview image does not overwrite any JPEG images that already exist. */ $dirname = dirname( $file ) . '/'; $ext = '.' . pathinfo( $file, PATHINFO_EXTENSION ); $preview_file = $dirname . wp_unique_filename( $dirname, wp_basename( $file, $ext ) . '-pdf.jpg' ); $uploaded = $editor->save( $preview_file, 'image/jpeg' ); unset( $editor ); // Resize based on the full size image, rather than the source. if ( ! is_wp_error( $uploaded ) ) { $image_file = $uploaded['path']; unset( $uploaded['path'] ); $metadata['sizes'] = array( 'full' => $uploaded, ); // Save the meta data before any image post-processing errors could happen. wp_update_attachment_metadata( $attachment_id, $metadata ); // Create sub-sizes saving the image meta after each. $metadata = _wp_make_subsizes( $merged_sizes, $image_file, $metadata, $attachment_id ); } } } } // Remove the blob of binary data from the array. unset( $metadata['image']['data'] ); // Capture file size for cases where it has not been captured yet, such as PDFs. if ( ! isset( $metadata['filesize'] ) && file_exists( $file ) ) { $metadata['filesize'] = wp_filesize( $file ); } /** * Filters the generated attachment meta data. * * @since 2.1.0 * @since 5.3.0 The `$context` parameter was added. * * @param array $metadata An array of attachment meta data. * @param int $attachment_id Current attachment ID. * @param string $context Additional context. Can be 'create' when metadata was initially created for new attachment * or 'update' when the metadata was updated. */ return apply_filters( 'wp_generate_attachment_metadata', $metadata, $attachment_id, 'create' ); } /** * Converts a fraction string to a decimal. * * @since 2.5.0 * * @param string $str Fraction string. * @return int|float Returns calculated fraction or integer 0 on invalid input. */ function wp_exif_frac2dec( $str ) { if ( ! is_scalar( $str ) || is_bool( $str ) ) { return 0; } if ( ! is_string( $str ) ) { return $str; // This can only be an integer or float, so this is fine. } // Fractions passed as a string must contain a single `/`. if ( substr_count( $str, '/' ) !== 1 ) { if ( is_numeric( $str ) ) { return (float) $str; } return 0; } list( $numerator, $denominator ) = explode( '/', $str ); // Both the numerator and the denominator must be numbers. if ( ! is_numeric( $numerator ) || ! is_numeric( $denominator ) ) { return 0; } // The denominator must not be zero. if ( 0 == $denominator ) { // phpcs:ignore Universal.Operators.StrictComparisons.LooseEqual -- Deliberate loose comparison. return 0; } return $numerator / $denominator; } /** * Converts the exif date format to a unix timestamp. * * @since 2.5.0 * * @param string $str A date string expected to be in Exif format (Y:m:d H:i:s). * @return int|false The unix timestamp, or false on failure. */ function wp_exif_date2ts( $str ) { list( $date, $time ) = explode( ' ', trim( $str ) ); list( $y, $m, $d ) = explode( ':', $date ); return strtotime( "{$y}-{$m}-{$d} {$time}" ); } /** * Gets extended image metadata, exif or iptc as available. * * Retrieves the EXIF metadata aperture, credit, camera, caption, copyright, iso * created_timestamp, focal_length, shutter_speed, and title. * * The IPTC metadata that is retrieved is APP13, credit, byline, created date * and time, caption, copyright, alt, and title. Also includes FNumber, Model, * DateTimeDigitized, FocalLength, ISOSpeedRatings, and ExposureTime. * * @todo Try other exif libraries if available. * @since 2.5.0 * * @param string $file * @return array|false Image metadata array on success, false on failure. */ function wp_read_image_metadata( $file ) { if ( ! file_exists( $file ) ) { return false; } $image_size = wp_getimagesize( $file ); if ( false === $image_size ) { return false; } list( , , $image_type ) = $image_size; /* * EXIF contains a bunch of data we'll probably never need formatted in ways * that are difficult to use. We'll normalize it and just extract the fields * that are likely to be useful. Fractions and numbers are converted to * floats, dates to unix timestamps, and everything else to strings. */ $meta = array( 'aperture' => 0, 'credit' => '', 'camera' => '', 'caption' => '', 'created_timestamp' => 0, 'copyright' => '', 'focal_length' => 0, 'iso' => 0, 'shutter_speed' => 0, 'title' => '', 'orientation' => 0, 'keywords' => array(), 'alt' => '', ); $iptc = array(); $info = array(); /* * Read IPTC first, since it might contain data not available in exif such * as caption, description etc. */ if ( is_callable( 'iptcparse' ) ) { wp_getimagesize( $file, $info ); if ( ! empty( $info['APP13'] ) ) { // Don't silence errors when in debug mode, unless running unit tests. if ( defined( 'WP_DEBUG' ) && WP_DEBUG && ! defined( 'WP_RUN_CORE_TESTS' ) ) { $iptc = iptcparse( $info['APP13'] ); } else { // Silencing notice and warning is intentional. See https://core.trac.wordpress.org/ticket/42480 $iptc = @iptcparse( $info['APP13'] ); } if ( ! is_array( $iptc ) ) { $iptc = array(); } // Headline, "A brief synopsis of the caption". if ( ! empty( $iptc['2#105'][0] ) ) { $meta['title'] = trim( $iptc['2#105'][0] ); /* * Title, "Many use the Title field to store the filename of the image, * though the field may be used in many ways". */ } elseif ( ! empty( $iptc['2#005'][0] ) ) { $meta['title'] = trim( $iptc['2#005'][0] ); } if ( ! empty( $iptc['2#120'][0] ) ) { // Description / legacy caption. $caption = trim( $iptc['2#120'][0] ); mbstring_binary_safe_encoding(); $caption_length = strlen( $caption ); reset_mbstring_encoding(); if ( empty( $meta['title'] ) && $caption_length < 80 ) { // Assume the title is stored in 2:120 if it's short. $meta['title'] = $caption; } $meta['caption'] = $caption; } if ( ! empty( $iptc['2#110'][0] ) ) { // Credit. $meta['credit'] = trim( $iptc['2#110'][0] ); } elseif ( ! empty( $iptc['2#080'][0] ) ) { // Creator / legacy byline. $meta['credit'] = trim( $iptc['2#080'][0] ); } if ( ! empty( $iptc['2#055'][0] ) && ! empty( $iptc['2#060'][0] ) ) { // Created date and time. $meta['created_timestamp'] = strtotime( $iptc['2#055'][0] . ' ' . $iptc['2#060'][0] ); } if ( ! empty( $iptc['2#116'][0] ) ) { // Copyright. $meta['copyright'] = trim( $iptc['2#116'][0] ); } if ( ! empty( $iptc['2#025'][0] ) ) { // Keywords array. $meta['keywords'] = array_values( $iptc['2#025'] ); } } } $meta['alt'] = wp_get_image_alttext( $file ); $exif = array(); /** * Filters the image types to check for exif data. * * @since 2.5.0 * * @param int[] $image_types Array of image types to check for exif data. Each value * is usually one of the `IMAGETYPE_*` constants. */ $exif_image_types = apply_filters( 'wp_read_image_metadata_types', array( IMAGETYPE_JPEG, IMAGETYPE_TIFF_II, IMAGETYPE_TIFF_MM ) ); if ( is_callable( 'exif_read_data' ) && in_array( $image_type, $exif_image_types, true ) ) { // Don't silence errors when in debug mode, unless running unit tests. if ( defined( 'WP_DEBUG' ) && WP_DEBUG && ! defined( 'WP_RUN_CORE_TESTS' ) ) { $exif = exif_read_data( $file ); } else { // Silencing notice and warning is intentional. See https://core.trac.wordpress.org/ticket/42480 $exif = @exif_read_data( $file ); } if ( ! is_array( $exif ) ) { $exif = array(); } $exif_description = ''; $exif_usercomment = ''; if ( ! empty( $exif['ImageDescription'] ) ) { $exif_description = trim( $exif['ImageDescription'] ); } if ( ! empty( $exif['COMPUTED']['UserComment'] ) ) { $exif_usercomment = trim( $exif['COMPUTED']['UserComment'] ); } if ( $exif_description ) { mbstring_binary_safe_encoding(); $description_length = strlen( $exif_description ); reset_mbstring_encoding(); if ( empty( $meta['title'] ) && $description_length < 80 ) { // Assume the title is stored in ImageDescription. $meta['title'] = $exif_description; } // If both user comments and description are present. if ( empty( $meta['caption'] ) && $exif_usercomment ) { if ( ! empty( $meta['title'] ) && $exif_description === $meta['title'] ) { $caption = $exif_usercomment; } else { if ( $exif_description === $exif_usercomment ) { $caption = $exif_description; } else { $caption = trim( $exif_description . ' ' . $exif_usercomment ); } } $meta['caption'] = $caption; } if ( empty( $meta['caption'] ) && $exif_usercomment ) { $meta['caption'] = $exif_usercomment; } if ( empty( $meta['caption'] ) ) { $meta['caption'] = $exif_description; } } elseif ( empty( $meta['caption'] ) && $exif_usercomment ) { $meta['caption'] = $exif_usercomment; $description_length = strlen( $exif_usercomment ); if ( empty( $meta['title'] ) && $description_length < 80 ) { $meta['title'] = trim( $exif_usercomment ); } } elseif ( empty( $meta['caption'] ) && ! empty( $exif['Comments'] ) ) { $meta['caption'] = trim( $exif['Comments'] ); } if ( empty( $meta['credit'] ) ) { if ( ! empty( $exif['Artist'] ) ) { $meta['credit'] = trim( $exif['Artist'] ); } elseif ( ! empty( $exif['Author'] ) ) { $meta['credit'] = trim( $exif['Author'] ); } } if ( empty( $meta['copyright'] ) && ! empty( $exif['Copyright'] ) ) { $meta['copyright'] = trim( $exif['Copyright'] ); } if ( ! empty( $exif['FNumber'] ) && is_scalar( $exif['FNumber'] ) ) { $meta['aperture'] = round( wp_exif_frac2dec( $exif['FNumber'] ), 2 ); } if ( ! empty( $exif['Model'] ) ) { $meta['camera'] = trim( $exif['Model'] ); } if ( empty( $meta['created_timestamp'] ) && ! empty( $exif['DateTimeDigitized'] ) ) { $meta['created_timestamp'] = wp_exif_date2ts( $exif['DateTimeDigitized'] ); } if ( ! empty( $exif['FocalLength'] ) ) { $meta['focal_length'] = (string) $exif['FocalLength']; if ( is_scalar( $exif['FocalLength'] ) ) { $meta['focal_length'] = (string) wp_exif_frac2dec( $exif['FocalLength'] ); } } if ( ! empty( $exif['ISOSpeedRatings'] ) ) { $meta['iso'] = is_array( $exif['ISOSpeedRatings'] ) ? reset( $exif['ISOSpeedRatings'] ) : $exif['ISOSpeedRatings']; $meta['iso'] = trim( $meta['iso'] ); } if ( ! empty( $exif['ExposureTime'] ) ) { $meta['shutter_speed'] = (string) $exif['ExposureTime']; if ( is_scalar( $exif['ExposureTime'] ) ) { $meta['shutter_speed'] = (string) wp_exif_frac2dec( $exif['ExposureTime'] ); } } if ( ! empty( $exif['Orientation'] ) ) { $meta['orientation'] = $exif['Orientation']; } } foreach ( array( 'title', 'caption', 'credit', 'copyright', 'camera', 'iso' ) as $key ) { if ( $meta[ $key ] && ! wp_is_valid_utf8( $meta[ $key ] ) ) { $meta[ $key ] = utf8_encode( $meta[ $key ] ); } } foreach ( $meta['keywords'] as $key => $keyword ) { if ( ! wp_is_valid_utf8( $keyword ) ) { $meta['keywords'][ $key ] = utf8_encode( $keyword ); } } $meta = wp_kses_post_deep( $meta ); /** * Filters the array of meta data read from an image's exif data. * * @since 2.5.0 * @since 4.4.0 The `$iptc` parameter was added. * @since 5.0.0 The `$exif` parameter was added. * * @param array $meta Image meta data. * @param string $file Path to image file. * @param int $image_type Type of image, one of the `IMAGETYPE_XXX` constants. * @param array $iptc IPTC data. * @param array $exif EXIF data. */ return apply_filters( 'wp_read_image_metadata', $meta, $file, $image_type, $iptc, $exif ); } /** * Gets the alt text from image meta data. * * @since 7.0.0 * * @param string $file File path to the image. * @return string Embedded alternative text. */ function wp_get_image_alttext( $file ) { $alt_text = ''; $img_contents = file_get_contents( $file ); if ( false === $img_contents ) { return $alt_text; } // Find the start and end positions of the XMP metadata. $xmp_start = strpos( $img_contents, '<x:xmpmeta' ); $xmp_end = strpos( $img_contents, '</x:xmpmeta>' ); if ( false === $xmp_start || false === $xmp_end ) { // No XMP metadata found. return $alt_text; } // Extract the XMP metadata from the JPEG contents $xmp_data = substr( $img_contents, $xmp_start, $xmp_end - $xmp_start + 12 ); // Parse the XMP metadata using DOMDocument. $doc = new DOMDocument(); if ( false === $doc->loadXML( $xmp_data ) ) { // Invalid XML in metadata. return $alt_text; } // Instantiate an XPath object, used to extract portions of the XMP. $xpath = new DOMXPath( $doc ); // Register the relevant XML namespaces. $xpath->registerNamespace( 'x', 'adobe:ns:meta/' ); $xpath->registerNamespace( 'rdf', 'http://www.w3.org/1999/02/22-rdf-syntax-ns#' ); $xpath->registerNamespace( 'Iptc4xmpCore', 'http://iptc.org/std/Iptc4xmpCore/1.0/xmlns/' ); $node_list = $xpath->query( '/x:xmpmeta/rdf:RDF/rdf:Description/Iptc4xmpCore:AltTextAccessibility' ); if ( $node_list && $node_list->count() ) { $node = $node_list->item( 0 ); // Get the site's locale. $locale = get_locale(); // Get the alt text accessibility alternative most appropriate for the site language. // There are 3 possibilities: // // 1. there is an rdf:li with an exact match on the site locale. // 2. there is an rdf:li with a partial match on the site locale (e.g., site locale is en_US and rdf:li has @xml:lang="en"). // 3. there is an rdf:li with an "x-default" lang. // // Evaluate in that order, stopping when we have a match. $alt_text = $xpath->evaluate( "string( rdf:Alt/rdf:li[ @xml:lang = '{$locale}' ] )", $node ); if ( ! $alt_text ) { $alt_text = $xpath->evaluate( 'string( rdf:Alt/rdf:li[ @xml:lang = "' . substr( $locale, 0, 2 ) . '" ] )', $node ); if ( ! $alt_text ) { $alt_text = $xpath->evaluate( 'string( rdf:Alt/rdf:li[ @xml:lang = "x-default" ] )', $node ); } } } return $alt_text; } /** * Validates that file is an image. * * @since 2.5.0 * * @param string $path File path to test if valid image. * @return bool True if valid image, false if not valid image. */ function file_is_valid_image( $path ) { $size = wp_getimagesize( $path ); return ! empty( $size ); } /** * Validates that file is suitable for displaying within a web page. * * @since 2.5.0 * * @param string $path File path to test. * @return bool True if suitable, false if not suitable. */ function file_is_displayable_image( $path ) { $displayable_image_types = array( IMAGETYPE_GIF, IMAGETYPE_JPEG, IMAGETYPE_PNG, IMAGETYPE_BMP, IMAGETYPE_ICO, IMAGETYPE_WEBP, IMAGETYPE_AVIF ); $info = wp_getimagesize( $path ); if ( empty( $info ) ) { $result = false; } elseif ( ! in_array( $info[2], $displayable_image_types, true ) ) { $result = false; } else { $result = true; } /** * Filters whether the current image is displayable in the browser. * * @since 2.5.0 * * @param bool $result Whether the image can be displayed. Default true. * @param string $path Path to the image. */ return apply_filters( 'file_is_displayable_image', $result, $path ); } /** * Loads an image resource for editing. * * @since 2.9.0 * * @param int $attachment_id Attachment ID. * @param string $mime_type Image mime type. * @param string|int[] $size Optional. Image size. Accepts any registered image size name, or an array * of width and height values in pixels (in that order). Default 'full'. * @return resource|GdImage|false The resulting image resource or GdImage instance on success, * false on failure. */ function load_image_to_edit( $attachment_id, $mime_type, $size = 'full' ) { $filepath = _load_image_to_edit_path( $attachment_id, $size ); if ( empty( $filepath ) ) { return false; } switch ( $mime_type ) { case 'image/jpeg': $image = imagecreatefromjpeg( $filepath ); break; case 'image/png': $image = imagecreatefrompng( $filepath ); break; case 'image/gif': $image = imagecreatefromgif( $filepath ); break; case 'image/webp': $image = false; if ( function_exists( 'imagecreatefromwebp' ) ) { $image = imagecreatefromwebp( $filepath ); } break; default: $image = false; break; } if ( is_gd_image( $image ) ) { /** * Filters the current image being loaded for editing. * * @since 2.9.0 * * @param resource|GdImage $image Current image. * @param int $attachment_id Attachment ID. * @param string|int[] $size Requested image size. Can be any registered image size name, or * an array of width and height values in pixels (in that order). */ $image = apply_filters( 'load_image_to_edit', $image, $attachment_id, $size ); if ( function_exists( 'imagealphablending' ) && function_exists( 'imagesavealpha' ) ) { imagealphablending( $image, false ); imagesavealpha( $image, true ); } } return $image; } /** * Retrieves the path or URL of an attachment's attached file. * * If the attached file is not present on the local filesystem (usually due to replication plugins), * then the URL of the file is returned if `allow_url_fopen` is supported. * * @since 3.4.0 * @access private * * @param int $attachment_id Attachment ID. * @param string|int[] $size Optional. Image size. Accepts any registered image size name, or an array * of width and height values in pixels (in that order). Default 'full'. * @return string|false File path or URL on success, false on failure. */ function _load_image_to_edit_path( $attachment_id, $size = 'full' ) { $filepath = get_attached_file( $attachment_id ); if ( $filepath && file_exists( $filepath ) ) { if ( 'full' !== $size ) { $data = image_get_intermediate_size( $attachment_id, $size ); if ( $data ) { $filepath = path_join( dirname( $filepath ), $data['file'] ); /** * Filters the path to an attachment's file when editing the image. * * The filter is evaluated for all image sizes except 'full'. * * @since 3.1.0 * * @param string $path Path to the current image. * @param int $attachment_id Attachment ID. * @param string|int[] $size Requested image size. Can be any registered image size name, or * an array of width and height values in pixels (in that order). */ $filepath = apply_filters( 'load_image_to_edit_filesystempath', $filepath, $attachment_id, $size ); } } } elseif ( function_exists( 'fopen' ) && ini_get( 'allow_url_fopen' ) ) { /** * Filters the path to an attachment's URL when editing the image. * * The filter is only evaluated if the file isn't stored locally and `allow_url_fopen` is enabled on the server. * * @since 3.1.0 * * @param string|false $image_url Current image URL. * @param int $attachment_id Attachment ID. * @param string|int[] $size Requested image size. Can be any registered image size name, or * an array of width and height values in pixels (in that order). */ $filepath = apply_filters( 'load_image_to_edit_attachmenturl', wp_get_attachment_url( $attachment_id ), $attachment_id, $size ); } /** * Filters the returned path or URL of the current image. * * @since 2.9.0 * * @param string|false $filepath File path or URL to current image, or false. * @param int $attachment_id Attachment ID. * @param string|int[] $size Requested image size. Can be any registered image size name, or * an array of width and height values in pixels (in that order). */ return apply_filters( 'load_image_to_edit_path', $filepath, $attachment_id, $size ); } /** * Copies an existing image file. * * @since 3.4.0 * @access private * * @param int $attachment_id Attachment ID. * @return string|false New file path on success, false on failure. */ function _copy_image_file( $attachment_id ) { $dst_file = get_attached_file( $attachment_id ); $src_file = $dst_file; if ( ! file_exists( $src_file ) ) { $src_file = _load_image_to_edit_path( $attachment_id ); } if ( $src_file ) { $dst_file = str_replace( wp_basename( $dst_file ), 'copy-' . wp_basename( $dst_file ), $dst_file ); $dst_file = dirname( $dst_file ) . '/' . wp_unique_filename( dirname( $dst_file ), wp_basename( $dst_file ) ); /* * The directory containing the original file may no longer * exist when using a replication plugin. */ wp_mkdir_p( dirname( $dst_file ) ); if ( ! copy( $src_file, $dst_file ) ) { $dst_file = false; } } else { $dst_file = false; } return $dst_file; }
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