Example introduction to regular expression form validation

This time I will bring youregular expressionform validationexample introduction, the following is a practical case, let’s take a look

First of all, I will explain to you the meaning of some symbols.

* matches the previous subexpression zero or more times;

^ matches the starting position of theinput characterstring; $matches the end position of the input string
1. /^$/ This is a general format.
2. Enter the functions that need to be implemented.
\d matches a numeric character, equivalent to [0-9]
+ matches the previous subexpression one or more times;
? Match the previous subexpression zero or once;
The following is a piece of code to analyzeForm verificationRegular expression, the specific code is as follows:

       
  
 
 
 
VIP会员注册
 
 
 
用户名：
 
 
 
 
 
密码：
 
 
 
 
 
确认密码：
 
 
 
 
 
手机号码：
 
 
 
 
 
座机号码：
 
 
 
 
 
邮箱号码：
 
 
 
 
 
二代身份证：
 
 
 
 
 
 
 
 
 
 
  

I believe you have mastered the methods after reading these cases. For more exciting information, please pay attention to other related articles on the PHP Chinese website!

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