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php checks whether username complies with regulations

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Release： 2016-07-25 09:01:13

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php checks whether username complies with regulations

http://blog.ddian.cn/?post=869

/**
* Check whether the username meets the regulations (more than two characters, only Chinese, letters, numbers, and underscores)
*
* @param STRING $username The username to be checked
* @return TRUE or FALSE
*/
function is_username($username) {
$strlen = strlen($username);
if(!preg_match("/^[a-zA- Z0-9_x7f-xff][a-zA-Z0-9_x7f-xff]+$/", $username)){
return false;
} elseif ( 20 return false;
}
return true;
}
//The following test
$str = 'abc';
if(is_username($str)) {
echo $str.'match';
}else {
echo $str.'does not match';
}
echo '
';
$str = 'Chinese';
if(is_username($str)) {
echo $str.'matches';
}else {
echo $str.'does not match';
}
echo '
';
$str = '12126_($@';
if(is_username($str)) {
echo $str.'match';
}else {
echo $str.'not match';
}
?>

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php检查用户名是否符合规定

source：php.cn

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