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<?php $regex = '/(((?!a).)*)*a\\{/'; $test_string = 'AAAAAAAAAAAAAA{AA'; echo "1:".preg_replace($regex,'WORKED',$test_string)."\n"; echo "1:".preg_replace($regex.'u','WORKED',$test_string)."\n"; echo "2:".mb_ereg_replace($regex,'WORKED',$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, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 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
1:AAAAAAAAAAAAAA{AA 1:AAAAAAAAAAAAAA{AA 2:AAAAAAAAAAAAAA{AA
Output for 5.2.0 - 5.2.1, 5.2.4 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
1: 1: 2:AAAAAAAAAAAAAA{AA
Output for 4.4.6 - 4.4.8, 5.2.2 - 5.2.3

Process exited with code 139.
Output for 4.3.2 - 4.3.3
1:AAAAAAAAAAAAAA{AA 1:AAAAAAAAAAAAAA{AA Fatal error: Call to undefined function: mb_ereg_replace() in /in/YNvPc on line 6
Process exited with code 255.
Output for 4.3.0 - 4.3.1
1:AAAAAAAAAAAAAA{AA 1:AAAAAAAAAAAAAA{AA Fatal error: Call to undefined function: mb_ereg_replace() in /in/YNvPc on line 6
preferences:
279.22 ms | 401 KiB | 460 Q