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<?php $cwd = sys_get_temp_dir() . '/php-src-proc-open-nul-poc'; @mkdir($cwd); $proc = proc_open( [PHP_BINARY, '-r', 'echo getcwd(), PHP_EOL;'], [1 => ['pipe', 'w']], $pipes, $cwd . "\0/ignored" ); echo stream_get_contents($pipes[1]); proc_close($proc);
Output for 8.5.0 - 8.5.3
/tmp/php-src-proc-open-nul-poc
Output for 8.3.0 - 8.3.30, 8.4.1 - 8.4.18
Fatal error: Uncaught Error: Call to undefined function proc_open() in /in/o56Sq:5 Stack trace: #0 {main} thrown in /in/o56Sq on line 5
Process exited with code 255.
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