第一种:
//昵称2-10位字符,需由中文、数字、字母(区分大小写)和下划线组合 $a = '的方'; $b = preg_match( "/^[\x{4e00}-\x{9fa5}A-Za-z0-9_]{2,10}$/u", $a ); var_dump( $b );
第二种:
//正则表达式6-16位字符(英文/数字/符号)三种组合 $pwd = 'ddddddA1'; $res = preg_match('/(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z]).{8,16}/', $pwd); var_dump( $res );
第三种:
//正则表达式8-16位字符(英文/数字/符号)至少两种或下划线组合 $pwd = 'dddee1d'; $res = preg_match('/^(\w*(?=\w*\d)(?=\w*[A-Za-z])\w*){8,16}$/', $pwd); var_dump( $res );
密码长度至少 6 位,必须包含有大写字母、小写字母、数字
function isPassword( $password ){ return preg_match( '/(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?!.*\s).{6,}/', $password ); }PHP代码
$uppercase = preg_match('#[A-Z]#', $password); $lowercase = preg_match('#[a-z]#', $password); $number = preg_match('#[0-9]#', $password); $special = preg_match('#[\W]{2,}#', $password); $length = strlen($password) >= 8; if(!$uppercase || !$lowercase || !$number || !$special || !$length) { $errorpw = 'Bad Password';
超强的密码
^(?=.{8})(?=.*[A-Z])(?=.*[a-z])(?=.*\d.*\d.*\d)(?=.*[^a-zA-Z\d].*[^a-zA-Z\d].*[^a-zA-Z\d])[-+%#a-zA-Z\d]+$添加特殊字符集将持续[...]在上述正则表达式(我放在那里,现在只是- +%#)。
^ - beginning of line/string (?=.{8}) - positive lookahead to ensure we have at least 8 chars (?=.*[A-Z]) - ...to ensure we have at least one uppercase char (?=.*[a-z]) - ...to ensure we have at least one lowercase char (?=.*\d.*\d.*\d) - ...to ensure we have at least three digits (?=.*[^a-zA-Z\d].*[^a-zA-Z\d].*[^a-zA-Z\d]) - ...to ensure we have at least three special chars (characters other than letters and numbers) [-+%#a-zA-Z\d]+ - combination of allowed characters $ - end of line/string
只允许6到10个字符。它还检查至少一个数字、大小写字母和至少一个特殊字符(字母和数字以外的字符)。
^(?=.*\d)(?=.*?[a-zA-Z])(?=.*?[\W_]).{6,10}$
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