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<?php $regex = '/(((?!a).)*)*a\\{/'; $test_string = 'AAAAAAAAAAAAAA{AA'; echo mb_ereg_replace($regex,'WORKED',$test_string); echo "\n"; var_dump(preg_match($regex,$test_string));
Output for 4.3.4 - 4.3.11, 4.4.0 - 4.4.5, 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.1, 5.2.4 - 5.2.17, 5.3.0 - 5.3.3, 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, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
AAAAAAAAAAAAAA{AA int(0)
Output for 5.3.4 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28
AAAAAAAAAAAAAA{AA bool(false)
Output for 4.4.6 - 4.4.8, 5.2.2 - 5.2.3
AAAAAAAAAAAAAA{AA
Process exited with code 139.
Output for 4.3.2 - 4.3.3
Fatal error: Call to undefined function: mb_ereg_replace() in /in/0ZlIY on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: mb_ereg_replace() in /in/0ZlIY on line 4

preferences:
242.01 ms | 401 KiB | 373 Q