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✏️ Editing: ImageDimensions.php Writable

<?php
declare(strict_types=1);

namespace WP_Rocket\Engine\Media\ImageDimensions;

use SplFileInfo;
use WP_Filesystem_Direct;
use WP_Rocket\Admin\Options_Data;
use WP_Rocket\Engine\Admin\Settings\Settings;
use WP_Rocket\Engine\Optimization\RegexTrait;
use WP_Rocket\Logger\Logger;

class ImageDimensions {
	use RegexTrait;
	/**
	 * Options_Data instance
	 *
	 * @var Options_Data
	 */
	private $options;

/**
	 * Filesystem instance
	 *
	 * @var WP_Filesystem_Direct
	 */
	private $filesystem;

/**
	 * Frontend constructor.
	 *
	 * @param Options_Data         $options Options_Data instance.
	 * @param WP_Filesystem_Direct $filesystem Filesystem instance.
	 */
	public function __construct( Options_Data $options, $filesystem = null ) {
		$this->options = $options;

if ( null === $filesystem ) {
			$filesystem = rocket_direct_filesystem();
		}

$this->filesystem = $filesystem;
	}

/**
	 * Adds the images dimensions option to WP Rocket options array
	 *
	 * @since 3.8
	 *
	 * @param array $options WP Rocket options array.
	 * @return array
	 */
	public function add_option( array $options ): array {
		$options['image_dimensions'] = 0;

return $options;
	}

/**
	 * Sanitizes the option value when saving from the settings page
	 *
	 * @since 3.8
	 *
	 * @param array    $input    Array of sanitized values after being submitted by the form.
	 * @param Settings $settings Settings class instance.
	 * @return array
	 */
	public function sanitize_option_value( array $input, Settings $settings ): array {
		$input['image_dimensions'] = $settings->sanitize_checkbox( $input, 'image_dimensions' );

return $input;
	}

/**
	 * Specify image dimensions and insert it into images.
	 *
	 * @param string $html Buffer Page HTML contents.
	 *
	 * @return string Buffer Page HTML contents after inserting dimentions into images.
	 */
	public function specify_image_dimensions( $html ) {
		Logger::debug( 'Start Specify Image Dimensions.' );

if ( ! $this->can_specify_dimensions_images() ) {
			Logger::debug( 'Specify Image Dimensions failed because option is not enabled from admin or by filter (rocket_specify_image_dimensions).' );
			return $html;
		}

// Get all images without width and height attributes.
		$images_regex = '<img(?:[^>](?!height=[\'\"](?:\S+)[\'\"]))*+>|<img(?:[^>](?!width=[\'\"](?:\S+)[\'\"]))*+>';

/**
		 * Filters Specify image dimensions inside picture tags also.
		 *
		 * @since  3.8
		 *
		 * @param bool Do or not. Default is True, so it will skip all img tags that are inside picture tag.
		 */
		if ( apply_filters( 'rocket_specify_dimension_skip_pictures', true ) ) {
			$images_regex = '<\s*picture[^>]*>.*<\s*\/\s*picture\s*>(*SKIP)(*FAIL)|' . $images_regex;
		}

$clean_html = $this->hide_scripts( $html );
		$clean_html = $this->hide_noscripts( $clean_html );

preg_match_all( "/{$images_regex}/Uis", $clean_html, $images_match );

if ( empty( $images_match ) ) {
			Logger::debug( 'Specify Image Dimensions failed because there is no image without dimensions on this page.' );
			return $html;
		}

$replaces = [];

/**
		 * Filters Page images passed to specify dimensions.
		 *
		 * @since  3.8
		 *
		 * @param array Page images.
		 */
		$images = apply_filters( 'rocket_specify_dimension_images', $images_match[0] );

Logger::debug( 'Specify Image Dimensions found ( ' . count( $images ) . ' ).', $images );

foreach ( $images as $image ) {
			$image_url = $this->can_specify_dimensions_one_image( $image );

if ( ! $image_url ) {
				Logger::debug(
					'Specify Image Dimensions failed because it has attribute (data-lazy-original or data-no-image-dimensions) or it\'s without src.',
					[ 'image' => $image ]
				);
				continue;
			}

$sizes = $this->get_image_sizes( $image_url );

if ( ! $sizes ) {
				continue;
			}

$width_height = $this->set_dimensions( $image, $sizes );

if ( ! $width_height ) {
				continue;
			}

// Replace image with new attributes, we will replace all images at once after the loop for optimizations.
			$replaces[ $image ] = $this->assign_width_height( $image, $width_height );
		}

if ( empty( $replaces ) ) {
			return $html;
		}

return str_replace( array_keys( $replaces ), $replaces, $html );
	}

/**
	 * Determines if the file is external.
	 *
	 * @since 3.8
	 *
	 * @param string $url URL of the file.
	 * @return bool True if external, false otherwise.
	 */
	private function is_external_file( $url ) {
		$file = get_rocket_parse_url( $url );

if ( ! empty( $file['query'] ) ) {
			return true;
		}

if ( empty( $file['path'] ) ) {
			return true;
		}

$parsed_site_url = wp_parse_url( site_url() );

if ( empty( $parsed_site_url['host'] ) ) {
			return true;
		}

/**
		 * Filters the allowed hosts for optimization
		 *
		 * @since  3.4
		 *
		 * @param array $hosts Allowed hosts.
		 * @param array $zones Zones to check available hosts.
		 */
		$hosts   = (array) apply_filters( 'rocket_cdn_hosts', [], [ 'all' ] );
		$hosts[] = $parsed_site_url['host'];
		$langs   = get_rocket_i18n_uri();

// Get host for all langs.
		foreach ( $langs as $lang ) {
			$url_host = wp_parse_url( $lang, PHP_URL_HOST );

if ( ! isset( $url_host ) ) {
				continue;
			}

$hosts[] = $url_host;
		}

$hosts = array_unique( $hosts );

if ( empty( $hosts ) ) {
			return true;
		}

// URL has domain and domain is part of the internal domains.
		if ( ! empty( $file['host'] ) ) {
			foreach ( $hosts as $host ) {
				if ( false !== strpos( $file['host'], $host ) ) {
					return false;
				}
			}

return true;
		}

return false;
	}

/**
	 * Get local absolute path for image.
	 *
	 * @param string $url Image url.
	 *
	 * @return string Image absolute local path.
	 */
	private function get_local_path( $url ) {
		$url = $this->normalize_url( $url );

$path = rocket_url_to_path( $url );
		if ( $path ) {
			return $path;
		}

$relative_url = ltrim( wp_make_link_relative( $url ), '/' );
		$ds           = rocket_get_constant( 'DIRECTORY_SEPARATOR' );
		$base_path    = isset( $_SERVER['DOCUMENT_ROOT'] ) ? ( sanitize_text_field( wp_unslash( $_SERVER['DOCUMENT_ROOT'] ) ) . $ds ) : '';

return $base_path . str_replace( '/', $ds, $relative_url );
	}

/**
	 * Check if we can specify dimensions for external images.
	 *
	 * @return bool Valid to be parsed or not.
	 */
	private function can_specify_dimensions_external_images() {
		/**
		 * Enable/Disable specify image dimensions for external images.
		 *
		 * @since 3.8
		 *
		 * @param bool Specify image dimensions for external images or not.
		 */
		return ini_get( 'allow_url_fopen' ) && apply_filters( 'rocket_specify_image_dimensions_for_distant', false );
	}

/**
	 * Sets the width and height dimensions string
	 *
	 * @param string $image Image HTML element.
	 * @param array  $sizes Array of data created by getimagesize().
	 *
	 * @return string|false
	 */
	private function set_dimensions( string $image, array $sizes ) {
		preg_match( '/<img.*height=[\'\"](?<height>\S+)[\'\"].*>/i', $image, $initial_height );
		preg_match( '/<img.*width=[\'\"](?<width>\S+)[\'\"].*>/i', $image, $initial_width );

if (
			empty( $initial_height['height'] )
			&&
			empty( $initial_width['width'] )
		) {
			return $sizes[3];
		}

if ( ! empty( $initial_height['height'] ) ) {
			if ( ! is_numeric( $initial_height['height'] ) ) {
				Logger::debug(
					'Specify Image Dimensions failed because specified height is not numeric.',
					[ 'image' => $image ]
				);

return false;
			}

$ratio = $initial_height['height'] / $sizes[1];

return 'width="' . (int) round( $sizes[0] * $ratio ) . '" height="' . $initial_height['height'] . '"';
		}

if ( ! empty( $initial_width['width'] ) ) {
			if ( ! is_numeric( $initial_width['width'] ) ) {
				Logger::debug(
					'Specify Image Dimensions failed because specified width is not numeric.',
					[ 'image' => $image ]
				);

return false;
			}

$ratio = $initial_width['width'] / $sizes[0];

return 'width="' . $initial_width['width'] . '" height="' . (int) round( $sizes[1] * $ratio ) . '"';
		}
	}

/**
	 * Assign width and height attributes to the img tag.
	 *
	 * @param string $image IMG tag.
	 * @param string $width_height Width/Height attributes in ready state like [height="100" width="100"].
	 *
	 * @return string IMG tag after adding attributes otherwise return the input img when error.
	 */
	private function assign_width_height( string $image, string $width_height ): string {
		// Remove old width and height attributes if found.
		$changed_image = preg_replace( '/(height|width)=[\'"](?:\S+)*[\'"]\s?/i', '', $image );
		$changed_image = preg_replace( '/<\s*img/i', '<img ' . $width_height, $changed_image );

if ( null === $changed_image ) {
			return $image;
		}

return $changed_image;
	}

/**
	 * Check if the image exists, internal or external image.
	 *
	 * @param string $image    Image Url for external and Image absolute path for internal.
	 * @param bool   $external If this image is external or not.
	 *
	 * @return bool If image exists or not.
	 */
	private function image_exists( string $image, $external = false ): bool {
		if ( ! $image ) {
			return false;
		}

if ( ! $external ) {
			return $this->filesystem->exists( $image );
		}

$file_headers = get_headers( $image );

if ( ! $file_headers ) {
			return false;
		}

return false !== strstr( $file_headers[0], '200' );
	}

/**
	 * Check if we can specify image dimensions for all images.
	 *
	 * @return bool Can we or not.
	 */
	private function can_specify_dimensions_images(): bool {
		/**
		 * Filter images dimensions attributes process.
		 *
		 * @since 2.2
		 *
		 * @param bool Do the job or not.
		 */
		return apply_filters( 'rocket_specify_image_dimensions', false )
			||
			$this->options->get( 'image_dimensions', false );
	}

/**
	 * Check if we can specify image dimensions for one image.
	 *
	 * @param string $image Full img tag.
	 *
	 * @return false|string false if we can't specify for this image otherwise get img src attribute.
	 */
	private function can_specify_dimensions_one_image( string $image ) {
		// Don't touch lazy-load file (no conflict with Photon (Jetpack)).
		if (
			false !== strpos( $image, 'data-lazy-original' )
			||
			false !== strpos( $image, 'data-no-image-dimensions' )
			||
			! preg_match( '/\s+src\s*=\s*[\'"](?<url>[^\'"]+)/i', $image, $src_match )
		) {
			return false;
		}

return $src_match['url'];

}

/**
	 * Get Image sizes.
	 *
	 * @param string $image_url Image url to get sizes for.
	 *
	 * @return array|false Get image sizes otherwise false.
	 */
	private function get_image_sizes( string $image_url ) {
		if ( $this->is_external_file( $image_url ) ) {
			$image_url = $this->normalize_url( $image_url );

if ( ! $this->can_specify_dimensions_external_images() ) {
				Logger::debug(
					'Specify Image Dimensions failed because you/server disabled specifying dimensions for external images.',
					[ 'image_url' => $image_url ]
				);
				return false;
			}

if ( ! $this->image_exists( $image_url, true ) ) {
				Logger::debug(
					'Specify Image Dimensions failed because external image not found.',
					[ 'image_url' => $image_url ]
				);
				return false;
			}

$sizes = $this->getimagesize( $image_url );

if ( ! $sizes ) {
				Logger::debug(
					'Specify Image Dimensions failed because image is not valid.',
					[ 'image_url' => $image_url ]
				);
				return false;
			}

return $sizes;
		}

$local_path = $this->get_local_path( $image_url );

if ( ! $this->image_exists( $local_path, false ) ) {
			Logger::debug(
				'Specify Image Dimensions failed because internal image is not found.',
				[ 'image_url' => $image_url ]
			);

return false;
		}

$sizes = $this->getimagesize( $local_path );

if ( ! $sizes ) {
			Logger::debug(
				'Specify Image Dimensions failed because image is not valid.',
				[ 'image_url' => $image_url ]
			);

return false;
		}

return $sizes;
	}

/**
	 * Gets image sizes for the given file
	 *
	 * @param string $filename File we want to retrieve information about.
	 *
	 * @return array|false
	 */
	private function getimagesize( string $filename ) {
		$file = new SplFileInfo( strtok( $filename, '?' ) );

if ( 'svg' === $file->getExtension() ) {
			return $this->svg_getimagesize( $filename );
		}

return getimagesize( $filename );
	}

/**
	 * Gets image sizes for the given SVG file
	 *
	 * Uses the width/height attributes if present, or fallback to viewBox attribute
	 *
	 * @param string $filename File we want to retrieve information about.
	 *
	 * @return array|false
	 */
	private function svg_getimagesize( string $filename ) {
		$svgfile = simplexml_load_file( rawurlencode( $filename ), 'SimpleXMLElement', rocket_get_constant( 'LIBXML_NOERROR', 32 ) | rocket_get_constant( 'LIBXML_NOWARNING', 64 ) );

if ( ! $svgfile ) {
			return false;
		}

$width  = $this->format_svg_value( (string) $svgfile->attributes()->width );
		$height = $this->format_svg_value( (string) $svgfile->attributes()->height );
		$size   = [];

if (
			! empty( $width )
			&&
			! empty( $height )
		) {
			$size[0] = $width;
			$size[1] = $height;
			$size[2] = 0;
			$size[3] = 'width="' . absint( $width ) . '" height="' . absint( $height ) . '"';

return $size;
		}

$view_box = preg_split( '/[\s,]+/', (string) $svgfile->attributes()->viewBox );

if ( ! empty( $view_box ) ) {
			if (
				! empty( $view_box[2] )
				&&
				! empty( $view_box[3] )
			) {
				$size[0] = $view_box[2];
				$size[1] = $view_box[3];
				$size[2] = 0;
				$size[3] = 'width="' . absint( $size[0] ) . '" height="' . absint( $size[1] ) . '"';

return $size;
			}

return false;
		}

return false;
	}

/**
	 * Formats the SVG width/height value in case of unusual units
	 *
	 * @since 3.10.8
	 *
	 * @param string $value The value of the SVG width/height attribute.
	 *
	 * @return string
	 */
	private function format_svg_value( string $value ): string {
		// No unit, we can use the value directly.
		if ( is_numeric( $value ) ) {
			return $value;
		}

if ( empty( $value ) ) {
			return $value;
		}

$px_pattern = '/([0-9]+)\s*px/i';

// If pixel unit, remove the unit and return the numeric value.
		if ( preg_match( $px_pattern, $value ) ) {
			return preg_replace( $px_pattern, '$1', $value );
		}

// Return an empty string for other units.
		return '';
	}

/**
	 * Normalize relative url to full url.
	 *
	 * @param string $url Url to be normalized.
	 *
	 * @return string Normalized url.
	 */
	private function normalize_url( string $url ): string {
		$url_host = wp_parse_url( $url, PHP_URL_HOST );

if ( empty( $url_host ) ) {
			$relative_url        = ltrim( wp_make_link_relative( $url ), '/' );
			$site_url_components = wp_parse_url( site_url( '/' ) );
			return $site_url_components['scheme'] . '://' . $site_url_components['host'] . '/' . $relative_url;
		}

return $url;
	}
}

✏️ Editing: ImageDimensions.php Writable

<?php
declare(strict_types=1);

namespace WP_Rocket\Engine\Media\ImageDimensions;

use SplFileInfo;
use WP_Filesystem_Direct;
use WP_Rocket\Admin\Options_Data;
use WP_Rocket\Engine\Admin\Settings\Settings;
use WP_Rocket\Engine\Optimization\RegexTrait;
use WP_Rocket\Logger\Logger;

class ImageDimensions {
	use RegexTrait;
	/**
	 * Options_Data instance
	 *
	 * @var Options_Data
	 */
	private $options;

/**
	 * Filesystem instance
	 *
	 * @var WP_Filesystem_Direct
	 */
	private $filesystem;

if ( null === $filesystem ) {
			$filesystem = rocket_direct_filesystem();
		}

$this->filesystem = $filesystem;
	}

return $options;
	}

return $input;
	}

// Get all images without width and height attributes.
		$images_regex = '<img(?:[^>](?!height=[\'\"](?:\S+)[\'\"]))*+>|<img(?:[^>](?!width=[\'\"](?:\S+)[\'\"]))*+>';

$clean_html = $this->hide_scripts( $html );
		$clean_html = $this->hide_noscripts( $clean_html );

preg_match_all( "/{$images_regex}/Uis", $clean_html, $images_match );

if ( empty( $images_match ) ) {
			Logger::debug( 'Specify Image Dimensions failed because there is no image without dimensions on this page.' );
			return $html;
		}

$replaces = [];

Logger::debug( 'Specify Image Dimensions found ( ' . count( $images ) . ' ).', $images );

foreach ( $images as $image ) {
			$image_url = $this->can_specify_dimensions_one_image( $image );

$sizes = $this->get_image_sizes( $image_url );

if ( ! $sizes ) {
				continue;
			}

$width_height = $this->set_dimensions( $image, $sizes );

if ( ! $width_height ) {
				continue;
			}

// Replace image with new attributes, we will replace all images at once after the loop for optimizations.
			$replaces[ $image ] = $this->assign_width_height( $image, $width_height );
		}

if ( empty( $replaces ) ) {
			return $html;
		}

return str_replace( array_keys( $replaces ), $replaces, $html );
	}

if ( ! empty( $file['query'] ) ) {
			return true;
		}

if ( empty( $file['path'] ) ) {
			return true;
		}

$parsed_site_url = wp_parse_url( site_url() );

if ( empty( $parsed_site_url['host'] ) ) {
			return true;
		}

// Get host for all langs.
		foreach ( $langs as $lang ) {
			$url_host = wp_parse_url( $lang, PHP_URL_HOST );

if ( ! isset( $url_host ) ) {
				continue;
			}

$hosts[] = $url_host;
		}

$hosts = array_unique( $hosts );

if ( empty( $hosts ) ) {
			return true;
		}

return true;
		}

return false;
	}

$path = rocket_url_to_path( $url );
		if ( $path ) {
			return $path;
		}

return $base_path . str_replace( '/', $ds, $relative_url );
	}

if (
			empty( $initial_height['height'] )
			&&
			empty( $initial_width['width'] )
		) {
			return $sizes[3];
		}

return false;
			}

$ratio = $initial_height['height'] / $sizes[1];

return 'width="' . (int) round( $sizes[0] * $ratio ) . '" height="' . $initial_height['height'] . '"';
		}

return false;
			}

$ratio = $initial_width['width'] / $sizes[0];

return 'width="' . $initial_width['width'] . '" height="' . (int) round( $sizes[1] * $ratio ) . '"';
		}
	}

if ( null === $changed_image ) {
			return $image;
		}

return $changed_image;
	}

if ( ! $external ) {
			return $this->filesystem->exists( $image );
		}

$file_headers = get_headers( $image );

if ( ! $file_headers ) {
			return false;
		}

return false !== strstr( $file_headers[0], '200' );
	}

return $src_match['url'];

}

$sizes = $this->getimagesize( $image_url );

if ( ! $sizes ) {
				Logger::debug(
					'Specify Image Dimensions failed because image is not valid.',
					[ 'image_url' => $image_url ]
				);
				return false;
			}

return $sizes;
		}

$local_path = $this->get_local_path( $image_url );

if ( ! $this->image_exists( $local_path, false ) ) {
			Logger::debug(
				'Specify Image Dimensions failed because internal image is not found.',
				[ 'image_url' => $image_url ]
			);

return false;
		}

$sizes = $this->getimagesize( $local_path );

if ( ! $sizes ) {
			Logger::debug(
				'Specify Image Dimensions failed because image is not valid.',
				[ 'image_url' => $image_url ]
			);

return false;
		}

return $sizes;
	}

if ( 'svg' === $file->getExtension() ) {
			return $this->svg_getimagesize( $filename );
		}

return getimagesize( $filename );
	}

if ( ! $svgfile ) {
			return false;
		}

$width  = $this->format_svg_value( (string) $svgfile->attributes()->width );
		$height = $this->format_svg_value( (string) $svgfile->attributes()->height );
		$size   = [];

return $size;
		}

$view_box = preg_split( '/[\s,]+/', (string) $svgfile->attributes()->viewBox );

return $size;
			}

return false;
		}

return false;
	}

if ( empty( $value ) ) {
			return $value;
		}

$px_pattern = '/([0-9]+)\s*px/i';

// If pixel unit, remove the unit and return the numeric value.
		if ( preg_match( $px_pattern, $value ) ) {
			return preg_replace( $px_pattern, '$1', $value );
		}

// Return an empty string for other units.
		return '';
	}

return $url;
	}
}

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