3v4l.org

run code in 300+ PHP versions simultaneously
<?php class MyFilter extends php_user_filter { public function filter($in, $out, &$consumed, $closing) { stream_bucket_make_writeable($in); return PSFS_ERR_FATAL; } } stream_filter_register('filtername', MyFilter::class); $source_resource = fopen('php://memory', 'rb+'); fwrite($source_resource, 'Test data'); rewind($source_resource); stream_filter_prepend($source_resource,'filtername',STREAM_FILTER_READ); var_dump(stream_copy_to_stream($source_resource, fopen('php://memory', 'wb')));
preferences:
30.69 ms | 412 KiB | 5 Q