WP_Image_Editor_Imagick::load(): true|WP_Error

150	public function load() {151		if ( $this->image instanceof Imagick ) {152			return true;153		}154 155		$is_stream = wp_is_stream( $this->file );156		$is_file   = ! $is_stream && is_file( $this->file );157 158		// Only allow loading files or streams.159		if ( ! $is_file && ! $is_stream ) {160			return new WP_Error( 'error_loading_image', __( 'File does not exist?' ), $this->file );161		}162 163		// Establish the provided filename based on the kind of resource being loaded.164		$given_filename = $this->file;165		if ( 0 === strncasecmp( $given_filename, 'file://', 7 ) ) {166			$given_filename = basename( substr( $given_filename, 7 ) ); // 7 is the strlen of 'file://'.167		} elseif ( 1 === preg_match( '~^https?://~i', $this->file ) ) {168			/*169			 * For URLs, it will be the final path segment.170			 *171			 * Example:172			 *173			 *     https://wordpress.org/i/happy.png?size=40px174			 *                             ╰───────╯175			 *                                this is the given filename176			 *177			 * If the stream returns a `Content-Disposition` header it would178			 * provide an alternative name, but this is used as a reasonable179			 * proxy to avoid adding the additional complexity of reading and180			 * parsing the returned HTTP headers.181			 */182			$url_path = wp_parse_url( $this->file, PHP_URL_PATH );183 184			// This URL can not be parsed, so it is not a valid image resource.185			if ( false === $url_path ) {186				return new WP_Error( 'error_loading_image', __( 'File is not an image.' ), $this->file );187			}188 189			/**190			 * The URL has an empty path, so continue with an empty string.191			 *192			 * This is the case with a URL such as `https://example.com?file_id=123`193			 */194			if ( null === $url_path ) {195				$url_path = '';196			}197 198			$last_path_at   = strrpos( $url_path, '/' );199			$given_filename = is_int( $last_path_at ) ? substr( $url_path, $last_path_at + 1 ) : $url_path;200			$given_filename = rawurldecode( $given_filename );201		}202 203		/*204		 * Strip off any potential `Imagick` format specifiers.205		 *206		 * If a real file exists with the identified format specifier, then207		 * `Imagick` may not treat it as a format, but WordPress will reject208		 * it anyway to avoid adding more complexity into this detection.209		 *210		 * `Imagick` reads only the first `FORMAT:` specifier on a name, but211		 * stripping a segment would promote a second specifier to the front212		 * of the name handed to `Imagick`, which would then honor it.213		 *214		 * Loop to capture all format specifiers for comparison.215		 *216		 * Exclude Windows drive-letter prefixes from here.217		 */218		$imagick_formats = array();219		while (220			false !== ( $format_ends_at = strpos( $given_filename, ':' ) ) &&221			1 !== preg_match( '~^[a-z]:~i', $given_filename )222		) {223			$imagick_formats[] = strtoupper( substr( $given_filename, 0, $format_ends_at ) );224			$given_filename    = substr( $given_filename, $format_ends_at + 1 );225		}226 227		$file_extension = strtolower( pathinfo( $given_filename, PATHINFO_EXTENSION ) );228 229		/*