Summary of the use of common regular expressions in forms in PHP

php中关于表单常用正则表达式的使用总结

function is_email($str){ 
//检验email 
return preg_match("/^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/", $str); 
} 
function is_url($str){ 
//检验网址 
return preg_match("/^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\&#39;:+!]*([^<>\"]) 
*$/", $str); 
} 
function is_qq($str){ 
//检验qq 
return preg_match("/^[1-9]\d{4,8}$/", $str); 
} 
function is_zip($str){ 
//检验邮编 
return preg_match("/^[1-9]\d{5}$/", $str); 
} 
function is_idcard($str){ 
//检验身份证 
return preg_match("/^\d{15}(\d{2}[A-Za-z0-9])?$/", $str); 
} 
function is_chinese($str){ 
检验是否是中文 
return ereg("^[".chr(0xa1)."-".chr(0xff)."]+$",$str); 
} 
function is_english($str){ 
//检验是否是英文 
return preg_match("/^[A-Za-z]+$/", $str); 
} 
function is_mobile($str){ 
//检验是否是手机 
return preg_match("/^((\(\d{3}\))|(\d{3}\-))?13\d{9}$/", $str); 
} 
function is_phone($str){ 
//建云那是否是电话 
return preg_match("/^((\(\d{3}\))|(\d{3}\-))?(\(0\d{2,3}\)|0\d{2,3}-)?[1-9]\d{6,7}$/", 
$str); 
} 
function is_safe($str){ 
return (preg_match("/^(([A-Z]*|[a-z]*|\d*|[-_\~!@#\$%\^&\*\.\(\)\[\]\{\}<>\?\\\/\&#39;\"]*)|. 
{0,5})$|\s/", $str) != 0); 
} 
}

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