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<?php $values = array( 'barry', 'barry1', 'Barry1', 'Barry1!', 'barry1!@', ); function validate($value) { return preg_match('/^.*(?=.{4,})(?=.*[a-zA-Z])(?=.*[0-9])(?=.*[\d\X])(?=.*[!$#%]).*$/', $value); } foreach ($values as $value) { var_dump(validate($value)); }
Output for git.master, git.master_jit, rfc.property-hooks
Warning: preg_match(): Compilation failed: escape sequence is invalid in character class at offset 46 in /in/2Snc6 on line 13 bool(false) Warning: preg_match(): Compilation failed: escape sequence is invalid in character class at offset 46 in /in/2Snc6 on line 13 bool(false) Warning: preg_match(): Compilation failed: escape sequence is invalid in character class at offset 46 in /in/2Snc6 on line 13 bool(false) Warning: preg_match(): Compilation failed: escape sequence is invalid in character class at offset 46 in /in/2Snc6 on line 13 bool(false) Warning: preg_match(): Compilation failed: escape sequence is invalid in character class at offset 46 in /in/2Snc6 on line 13 bool(false)

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