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<?php var_dump(ini_get("pcre.backtrack_limit")); ini_set("pcre.backtrack_limit", 100 * 1000); var_dump(preg_match('/TEST/', "aa" . str_repeat("a", 100 * 100000) . "TEST"));
Output for 5.4.38 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 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
string(7) "1000000" int(1)
Output for 5.3.7 - 5.3.29, 5.4.0 - 5.4.37
string(7) "1000000" Warning: ini_set() has been disabled for security reasons in /in/6lCL1 on line 3 int(1)
Output for 5.2.0 - 5.2.17, 5.3.0 - 5.3.6
string(6) "100000" Warning: ini_set() has been disabled for security reasons in /in/6lCL1 on line 3 int(1)
Output for 4.3.5 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
string(0) "" Warning: ini_set() has been disabled for security reasons in /in/6lCL1 on line 3 int(1)
Output for 4.3.1 - 4.3.4
string(0) "" Warning: ini_set,pcntl_fork() has been disabled for security reasons in /in/6lCL1 on line 3 int(1)
Output for 4.3.0
string(0) "" int(1)

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261.71 ms | 401 KiB | 356 Q