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<?php // capture any unexpected output and exit execution ob_start(function($buffer) { ob_end_clean(); echo 'unexpected output: ' . $buffer . "\n"; exit; }, 1); // do some work on shutdown register_shutdown_function(function() { echo 'shutting down'; }); echo 'test_1'; echo 'test_2';
Output for 7.0.1 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
Fatal error: ob_end_clean(): Cannot use output buffering in output buffering display handlers in /in/39Faa on line 5 shutting down
Process exited with code 255.
Output for 7.0.0
Catchable fatal error: ob_end_clean(): Cannot use output buffering in output buffering display handlers in /in/39Faa on line 5 shutting down
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Fatal error: Cannot destroy active lambda function in /in/39Faa on line 5 shutting down
Process exited with code 255.
Output for 5.3.11 - 5.3.29
Fatal error: ob_end_clean(): Cannot use output buffering in output buffering display handlers in /in/39Faa on line 5
Process exited with code 255.
Output for 5.3.0 - 5.3.10

Process exited with code 139.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION, expecting ')' in /in/39Faa on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION, expecting ')' in /in/39Faa on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/39Faa on line 4
Process exited with code 255.
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276.58 ms | 401 KiB | 469 Q