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<?php $ex = "register_shutdown_function('assert', 'phpinfo()')"; ob_start('register_shutdown_function'); echo $ex; ob_get_flush();
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
register_shutdown_function('assert', 'phpinfo()') Fatal error: Uncaught TypeError: register_shutdown_function(): Argument #1 ($callback) must be a valid callback, function "register_shutdown_function('assert', 'phpinfo()')" not found or invalid function name in /in/T4etQ:6 Stack trace: #0 [internal function]: register_shutdown_function('register_shutdo...', 9) #1 /in/T4etQ(6): ob_get_flush() #2 {main} thrown in /in/T4etQ on line 6
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
register_shutdown_function('assert', 'phpinfo()') Warning: register_shutdown_function(): Invalid shutdown callback 'register_shutdown_function('assert', 'phpinfo()')' passed in /in/T4etQ on line 6

preferences:
149.57 ms | 403 KiB | 238 Q