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<?php function hasSpecialChar($subject) { $pattern = "/[`~!@#$%^&*()+=|{}':;',\\[\\].<>\/?~!@#¥%……&*()——+|{}【】‘;:”\"“’。,、?]/"; if (preg_match($pattern, $subject)) { return true; } return false; } var_dump(hasSpecialChar('问答社区')); // boolean true var_dump(hasSpecialChar('Segmentfault')); // boolean false var_dump(hasSpecialChar('@Segmentfault')); // boolean true
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.1 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.7, 7.2.29 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
bool(true) bool(false) bool(true)
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/hnkMT on line 15
Process exited with code 255.

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