wp-includes/class-wp-image-editor.php:568Either calls editor's save function or handles file as a stream.
$filenamestring$callbackcallable$argumentsarraybool protected function make_image( $filename, $callback, $arguments ) { $stream = wp_is_stream( $filename ); if ( $stream ) { ob_start(); } else { // The directory containing the original file may no longer exist when using a replication plugin. wp_mkdir_p( dirname( $filename ) ); } $result = call_user_func_array( $callback, $arguments ); if ( $result && $stream ) { $contents = ob_get_contents(); $fp = fopen( $filename, 'w' ); if ( ! $fp ) { ob_end_clean(); return false; } fwrite( $fp, $contents ); fclose( $fp ); } if ( $stream ) { ob_end_clean(); } return $result; }Introduced in 3.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-image-editor.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.