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run code in 300+ PHP versions simultaneously
<?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));
Output for 7.4.25 - 7.4.33, 8.0.12 - 8.0.26, 8.1.0 - 8.1.13
false
Output for 8.0.0 - 8.0.11
Warning: stream_isatty(): Cannot cast a filtered stream on this system in /in/0EHT4 on line 19 Warning: stream_isatty(): Cannot cast a filtered stream on this system in /in/0EHT4 on line 19 false
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.24
Warning: stream_isatty(): cannot cast a filtered stream on this system in /in/0EHT4 on line 19 Warning: stream_isatty(): cannot cast a filtered stream on this system in /in/0EHT4 on line 19 false

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