Ajax and PHP Regular expression validation form and verification Code _php instance

Pattern-matching characters:

\: Escape character example: \b escaped B

^: Regular expression Start symbol

$: Regular expression End symbol

*: Matches the preceding character to appear 0 times or n times

+: Match the preceding character to appear 1 times or n times

?: matches the preceding character appears 0 or 1 times

.: matches all single characters except line breaks

|: Or, for example, x|y matches x or y

{n}: matches the preceding n characters

{n,m}: matches at least n up to M preceding characters

[XYZ]: matches any one of the characters in the brackets

[^XYZ]: Match any one of the characters except in brackets is equivalent to [0-9]

\w: Matching any number or letter or underscore is equivalent to [a-za-z0-9_]

\d: Matches the number between any one 0--9

Pattern modifier:

I: Ignore case

Examples of common regular expressions:

The username is made up of 6-18-digit alphanumeric underscores and cannot be preceded by a number

var r_name=/^[a-z]\w{5,17}$/i

Password length must not be less than six digits

var r_pwd=/^\w{6,}$/

All the general email addresses

var r_eamil=/^\w+@\w+ (\.) \w+$/

Match a QQ email address

861745122@qq.com
var r_qq_email=/^\d{5,} @qq (\.) com$/

Match a 163 email address

var r_163_email=/^\w+@163 (\.) com$/

Matching a suffix name may be. com|.net|.cn|.edu

var email=/^\w+@\w+ (\.) com|net|cn|edu$/

Required to enter a valid age section

var r_age=/^\d{1,2}$/

if (age>=18&&age "=100")

Verify mobile phone Number: 11 digits 13 15 18 Start

var r_tel=/^1[3,5,8]\d{9}$/

Verify ID number 18 digits or 17 digits plus an X

var r_s=/^\d{18}|\d{17}x$/i

Verify Chinese var reg=/^[\u4e00-\u9fa5]{2,17}$/

Php

$reg = "/^[\x{4e00}-\x{9fa5}]$/u"

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php Regular validation

<?php header ("Content-type:text/html;charset=utf8"); 
Var_dump ($_post);d ie; Array (5) {["uname"]=> string (9) "Liu Weishu" ["Uqq"]=> string (a) "1111111111" ["Uemail"]=> string (12) "66555@" Qq.com "[Utel"]=> string (one) "15863162320" ["Uinfo"]=> string (48) "Place to begin a holiday to open activity healthy words Summary"} empty ($_post["uname"])? $ 
Uname= "": $uname =$_post["uname"]; 
Empty ($_post["Uemail"])? $uemail = "": $uemail =$_post["Uemail"]; 
Empty ($_post["Utel"])? $utel = "": $utel =$_post["Utel"]; 
Empty ($_post["UQQ"])? $uqq = "": $uqq =$_post["UQQ"]; 
Empty ($_post["Uinfo"])? $uinfo = "": $uinfo =$_post["Uinfo"]; 
Verify name $reg = "/^[\x{4e00}-\x{9fa5}]{2,3}$/u"; 
if (!preg_match ($reg, $uname)) {echo "User name should be 2-3 characters";d ie; 
Header ("refresh:1;url=form.html"); //Verify Mailbox $reg = "/^ (\w+@\w+ (\.) 
COM|NET|CN) $/"; 
if (!preg_match ($reg, $uemail)) {echo mailbox must contain @ and end with COM; header ("refresh:1;url=form.html"); die; 
/Verify the landline number $reg = "/^\d{11}$/"; 
if (!preg_match ($reg, $utel)) {echo "landline number in 010-22222222 format"; Header ("refresh:1;url=form.html"); die; }//Verify QQ number 
$reg = "/^\d{5,11}$/"; 
if (!preg_match ($reg, $uqq)) {echo "QQ must be a 5-11-digit pure number"; Header ("refresh:1;url=form.html"); die; 
}//Authentication profile/* $reg = "/^[\x{4e00}-\x{9fa5}]{10,100}\w+/u"; 
if (!preg_match ($reg, $uinfo)) {echo "Introduction should be 10-100 Chinese characters";d ie; 
Header ("refresh:1;url=form.html"); 
///Connection Database $link =mysql_connect (' 127.0.0.1 ', ' root ', ' root ') or Die ("Connection failed"); 
Select Database mysql_select_db (' Kaoshi ', $link); 
Sets the character set mysql_query ("Set names UTF8"); Write SQL statements $sql = "INSERT into Zhuce (c_name,c_qq,c_email,c_tel,c_info) VALUES (' $uname ', ' $uqq ', ' $uemail ', ' $utel ', ' $ 
Uinfo ') "; 
echo $sql;d ie; 
$rel =mysql_query ($sql); 
if ($rel) {echo "registered successfully"; Header ("refresh:1;url=show.php"); 
}else{echo "registration failed"; Header ("refresh:1;url=form.html"); ?>

The above is a small series to introduce Ajax and PHP regular expression verification form and verification code, I hope to help you, if you have any questions please give me a message, small series will promptly reply to everyone. Here also thank you very much for the cloud Habitat Community website support!