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<?php ob_start(function($buffer) { return preg_replace('/quick/', 'slow', $buffer); }); echo 'The quick brown fox jumped over the lazy dog.'; ob_flush();
Output for 5.3.0 - 7.1.0
The slow brown fox jumped over the lazy dog.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION, expecting ')' in /in/0WnU0 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION, expecting ')' in /in/0WnU0 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/0WnU0 on line 3
Process exited with code 255.