Regular expressions used by php forms

Regular expressions are commonly used in php forms, and the code is as follows:

function is_email($str){ 
// Inspection email 
return preg_match("/^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/", $str); 
} 
function is_url($str){ 
// Check Web site  
return preg_match("/^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"]) 
*$/", $str); 
} 
function is_qq($str){ 
// Inspection qq 
return preg_match("/^[1-9]\d{4,8}$/", $str); 
} 
function is_zip($str){ 
// Inspection zip code  
return preg_match("/^[1-9]\d{5}$/", $str); 
} 
function is_idcard($str){ 
// Check ID card  
return preg_match("/^\d{15}(\d{2}[A-Za-z0-9])?$/", $str); 
} 
function is_chinese($str){ 
 Check whether it is Chinese  
return ereg("^[".chr(0xa1)."-".chr(0xff)."]+$",$str); 
} 
function is_english($str){ 
// Check whether it is in English  
return preg_match("/^[A-Za-z]+$/", $str); 
} 
function is_mobile($str){ 
// Check whether it is a mobile phone  
return preg_match("/^((\(\d{3}\))|(\d{3}\-))?13\d{9}$/", $str); 
} 
function is_phone($str){ 
// Jianyun, is that a phone  
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*|[-_\~!@#\$%\^&\*\.\(\)\[\]\{\}<>\?\\\/\'\"]*)|. 
{0,5})$|\s/", $str) != 0); 
} 
} 

PS: Let's share another piece of code

<?php
/**
* @description:  Regular expression matching 
*/
class Regex {
/**
* @ Mobile phone number 
*/
public static function Phone($subject) {
$pattern='/^(0|86|17951)?(13[0-9]|15[012356789]|1[78][0-9]|14[57])[0-9]{8}$/';
return Regex::PublicMethod($pattern, $subject);
}
/**
* @ Figures 
*/
public static function Number($subject) {
$pattern='/^[0-9]+$/';
return Regex::PublicMethod($pattern, $subject);
}
/**
* @ Year   Format: yyyy
*/
public static function Year($subject) {
$pattern='/^(\d{4})$/';
return Regex::PublicMethod($pattern, $subject);
}
/**
* @ Month   Format :mm
*/
public static function Month($subject) {
$pattern='/^0?([1-9])$|^(1[0-2])$/';
return Regex::PublicMethod($pattern, $subject);
}
/**
* @ Date   Format: yyyy-mm-dd
*/
public static function Day($subject) {
$pattern='/^(\d{4})-(0?\d{1}|1[0-2])-(0?\d{1}|[12]\d{1}|3[01])$/';
return Regex::PublicMethod($pattern, $subject);
}
/**
* @ Date time   Format: yyyy-mm-dd hh:ii:ss
*/
public static function DateTime($subject) {
$pattern='/^(\d{4})-(0?\d{1}|1[0-2])-(0?\d{1}|[12]\d{1}|3[01])\s(0\d{1}|1\d{1}|2[0-3]):[0-5]\d{1}:([0-5]\d{1})$/';
return Regex::PublicMethod($pattern, $subject);
}
/**
* @ Mailbox 
*/
public static function Email($subject) {
$pattern='/\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*/';
return Regex::PublicMethod($pattern, $subject);
}
/**
* @ Zip code 
*/
public static function Postcode($subject) {
$pattern='/[1-9]\d{5}(?!\d)/';
return Regex::PublicMethod($pattern, $subject);
}
/**
* @ Valid picture address 
*/
public static function Photo($subject) {
$pattern='/\b(([\w-]+:\/\/?|www[.])[^\s()<>]+(?:\([\w\d]+\)|([^[:punct:]\s]|\/)))/';
return Regex::PublicMethod($pattern, $subject);
}
/**
* @URL Address 
*/
public static function UrlAddress($subject) {
$pattern='/\b(([\w-]+:\/\/?|www[.])[^\s()<>]+(?:\([\w\d]+\)|([^[:punct:]\s]|\/)))/';
return Regex::PublicMethod($pattern, $subject);
}
/**
* @ Effective HTTP Address 
*/
public static function EffectiveHttp($subject) {
$pattern='/\b(([\w-]+:\/\/?|www[.])[^\s()<>]+(?:\([\w\d]+\)|([^[:punct:]\s]|\/)))/';
return Regex::PublicMethod($pattern, $subject);
}
/**
* @ Identity card 
*/
public static function Identity($subject) {
$pattern='/(^\d{15}$)|(^\d{17}([0-9]|X)$)/';
return Regex::PublicMethod($pattern, $subject);
}
/**
* @IPv4
*/
public static function Ipv4($subject) {
$pattern='/^(((\d{1,2})|(1\d{2})|(2[0-4]\d)|(25[0-5]))\.){3}((\d{1,2})|(1\d{2})|(2[0-4]\d)|(25[0-5]))$/';
return Regex::PublicMethod($pattern, $subject);
}
/**
* @IPv6
*/
public static function Ipv6($subject) {
$pattern='/^([\da-fA-F]{1,4}:){7}[\da-fA-F]{1,4}$/';
return Regex::PublicMethod($pattern, $subject);
}
/**
* @ Matching regular common method 
*/
public static function PublicMethod($pattern, $subject){
if(preg_match($pattern, $subject)){
return true;
}
return false;
}
}

Ok, that's all the content. I hope it will be helpful to everyone!