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Required fields for PHP form validation--w3school learning note w3school Offline manual w3school tiy w3school manual Download

Source: Internet
Author: User
Tags php form php form validation
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Next, verify the required fields via PHP

Validation rules:
Fields – Validation rules
Name – required, must contain letters and spaces
Email – required, must contain a valid e-mail address, including @ and.
URL (website) – optional, if the fill must be a valid URL
Comment (comment) – optional, multi-line input field
Gender (gender) – required, select an item

HTML code:

<html><head><title> 
     title
 > 
     Head
 ><body><formAction=htmlspecialchars (" 
      echo $_server['php_self'];?>") method= ' post ' > Name:<inputtype=' text 'name=' name ' /><spanstyle=' color:red '>*  
       echo$name _err; ?> 
    
       span
  ><br/>E-Mail:<inputtype=' text 'name=' email ' /><spanstyle=' color:red '>*  
       echo$email _err; ?> 
    
       span
  ><br/>Url:<inputtype=' text 'name=' website ' /><br/>Comments:<textareaname=' comment 'rows=3cols= >  
      textarea
 ><br/>Gender:<inputtype="Radio"name=' gender 'value =0checked=' checked '/>Women<inputtype="Radio"name=' gender 'value=1 / >Men<br/><inputtype=' Submit 'value=' Submit ' /> 
     Form
 > 
     Body
 > 
     HTML
 >

PHP code


    $name=$email=$website=$comment='';$name _err=$email _err='';//Store error messagesif($_server[' Request_method ']==' POST '){if($_post[' name ']==''){$name _err=' The name cannot be empty '; }Else{$name=test_input ($_post[' name ']); }if($_post[' Email ']==''){$email _err=' mailbox cannot be empty '; }Else{$email=test_input ($_post[' Email ']); }$website=test_input ($_post[' website ']);$comment=test_input ($_post[' comment ']);//Because I have a female selected by default in HTML, so sex does not have to be verified as empty$gender=test_input ($_post[' Gender ']);} functiontest_input($data){$data=trim ($data);$data=stripslashes ($data);$data=htmlspecialchars ($data);return$data;}?>

'). addclass (' pre-numbering '). Hide (); $ (this). addclass (' has-numbering '). Parent (). append ($numbering); for (i = 1; i <= lines; i++) {$numbering. Append ($ ('
  • '). Text (i)); }; $numbering. FadeIn (1700); }); });

    The above describes the PHP form verification required Fields--w3school learning notes, including the w3school aspects of the content, I hope that the PHP tutorial interested in friends to help.

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