Online PHP editor | refs for 0EHT4

<?php class strtoupper_filter extends php_user_filter { #[\ReturnTypeWillChange] function filter($in, $out, &$consumed, $closing) { while ($bucket = stream_bucket_make_writeable($in)) { $bucket->data = strtoupper($bucket->data); $consumed += $bucket->datalen; stream_bucket_append($out, $bucket); } return PSFS_PASS_ON; } } $stdout = fopen('php://stdout', 'wb'); stream_filter_register('capture', strtoupper_filter::class); stream_filter_append($stdout, 'capture'); var_export(stream_isatty($stdout));