Wu Yuxiong - born natural development of learning PHP: Form - verification message and URL

$ name = test_input ( $ _POST [ "name" ]);
 IF (! the preg_match ( "/ ^ [A-zA-the Z] * $ /", $ name )) {
   $ nameErr = "allows only letters and spaces" ; 
}

In Email $ = test_input ( $ _POST [ "In Email" ]);
 IF (! the preg_match ( "/([\w\-]+\@[\w\-]+\.[\w\-]+)/" , $ In email )) {
   $ emailErr = "illegal mailbox format" ; 
}

Website $ = test_input ( $ _POST [ "Website" ]);
 IF (! the preg_match ( "/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0- + # & @ 9 \ /% = ~ _ |:?!.,;] * [- A-Z0-9 + & @ # \ /% = ~ _ |] / i ", $ Website )) {
   $ websiteErr = "illegal address of the URL" ; 
}

<! DOCTYPE the HTML> 
<HTML> 
<head> 
<Meta charset = "UTF-. 8"> 
<title> novice tutorial (runoob.com) </ title> 
<style> 
.error {Color: # FF0000;} 
</ style > 
</ head> 
<body> 

<? PHP
 // custom variable and defaults to null value 
$ nameErr = $ emailErr = $ genderErr = $ websiteErr = "" ;
 $ name = $ In Email = $ Gender = $ Comment = $ Website = "" ; 

IF ( $ _SERVER [ "REQUEST_METHOD"] == "POST") {
   IF ( empty ( $ _POST [ "name" ])) {
       $ nameErr = "required the Name IS" ; 
      } the else {
          $ name = test_input ( $ _POST [ "name" ]);
          // detect whether the name spaces contain only letters with 
         IF (! the preg_match ( "/ ^ [A-zA-the Z] * $ /", $ name )) {
          $ nameErr = "allows only letters and spaces" ; 
         } 
     } 
   
   IF ( empty ( $ _POST [ "In Email" ]) ) {
       $ emailErr = "Email IS required";
   }the else {
       $ In Email = test_input ( $ _POST [ "In Email" ]);
       // detecting whether legitimate mail 
      IF (! the preg_match ( "/ ([\ W \ -] + \ @ [\ W \ -] + \ [\. W \ -] +) / ", $ In email )) {
          $ emailErr =" illegal mailbox format " ; 
      } 
   } 
     
   IF ( empty ( $ _POST [" Website " ])) {
       $ Website =" " ; 
   } the else {
       $ Website test_input = ( $ _POST [ "Website" ]);
      // detect whether the URL address legitimate 
     IF (! Preg_match ( "/ \ b (:( ?: HTTPS | the FTP):??.? \ / \ / | The WWW \) [- A-Z0-9 + & @ # \ /% = ~ _ | !: .,;] * [- a-Z0-9 + & @ # \ /% = ~ _ |] / I ", $ Website )) {
          $ websiteErr =" URL address of the illegal " ; 
      } 
   } 

   IF ( empty ( $ _POST [ "Comment" ])) {
       $ Comment = "" ; 
   } the else {
       $ Comment = test_input ( $ _POST [ "Comment" ]); 
   } 

   IF ( empty ( $ _POST [ "Gender" ])) {
       $ genderErr = "gender is required.";
   } else {
      $gender = test_input($_POST["gender"]);
   }
}

function test_input($data) {
   $data = trim($data);
   $data = stripslashes($data);
   $data = htmlspecialchars($data);
   return $data;
}
?>

<h2>PHP 表单验证实例</h2>
<p><span class="error">* 必需字段。</span></p>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>"> 
   名字: <input type="text" name="name">
   <span class="error">* <?php echo $nameErr;?></span>
   <br><br>
   E-mail: <input type="text" name="email">
   <span class="error">* <?php echo $emailErr;?></span>
   <br><br>
   网址: <input type="text" name="website">
   <span class="error"><?php echo $websiteErr;?></span>
   <br><br>
   备注: <textarea name="comment" rows="5" cols="40"></textarea>
   <br><br>
   性别:
   <input type="radio" name="gender" value="female">女
   <input type="radio" name="gender" value="male">男
   <span class="error">* <?php echo $genderErr;?></span>
   <br><br>
   <input type="submit" name="submit" value="Submit"> 
</form>

<?php
echo "<h2>您输入的内容是:</h2>";
echo $name;
echo "<br>";
echo $email;
echo "<br>";
echo $website;
echo "<br>";
echo $comment;
echo "<br>";
echo $gender;
?>

</body>
</html>

<! DOCTYPE the HTML> 
<HTML> 
<head> 
<Meta charset = "UTF-. 8"> 
<title> novice tutorial (runoob.com) </ title> 
<style> 
.error {Color: # FF0000;} 
</ style > 
</ head> 
<body> 

<? PHP
 // custom variable and defaults to null value 
$ nameErr = $ emailErr = $ genderErr = $ websiteErr = "" ;
 $ name = $ In Email = $ Gender = $ Comment = $ Website = "" ; 

IF ( $ _SERVER [ "REQUEST_METHOD"] == "POST")
{
    IF ( empty ( $ _POST [ "name" ])) 
    { 
        $ nameErr = "name is required" ; 
    } 
    the else 
    { 
        $ name = test_input ( $ _POST [ "name" ]);
         // detect name contains only letters with space 
        IF (! the preg_match ( "/ ^ [A-zA-the Z] * $ /", $ name )) 
        { 
            $ nameErr = "only letters and spaces" ; 
        } 
    } 
    
    IF ( empty ( $ _POST [ "In Email" ] )) 
    { 
      $ emailErr = "mailbox is required" ;
    }
     //the else 
    { 
        $ In Email = test_input ( $ _POST [ "In Email" ]);
         // detecting whether legitimate mail 
        IF (! the preg_match ( "/ ([\ W \ -] + \ @ [\ W \ -] + \ [\. W \ -] +) / ", $ In email )) 
        { 
            $ emailErr =" illegal mailbox format " ; 
        } 
    } 
    
    IF ( empty ( $ _POST [" Website " ])) 
    { 
        $ Website =" " ; 
    } 
    the else 
    { 
        $ Website test_input = ( $ _POST [ "Website" ]);
         detecting the URL is legitimate if
         (! Preg_match ( "/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%? ~ _ = |:!.,;] * [- a-Z0-9 + & @ # \ /% = ~ _ |] / i ", $ Website )) 
        { 
            $ websiteErr =" URL address illegal " ; 
        } 
    } 
    
    IF ( empty ( $ _POST [ "Comment" ])) 
    { 
        $ Comment = "" ; 
    } 
    the else 
    { 
        $ Comment = test_input ( $ _POST [ "Comment" ]); 
    } 
    
    IF ( empty ( $ _POST [ "Gender"]))
    {
        $ genderErr = "sex is required" ; 
    } 
    the else 
    { 
        $ Gender = test_input ( $ _POST [ "Gender" ]); 
    } 
} 

function test_input ( $ Data ) 
{ 
    $ Data = TRIM ( $ Data );
     $ Data = stripslashes ( Data $ );
     $ Data = htmlspecialchars ( $ Data );
     return  $ Data ; 
}
 ?> 

<H2> examples of the PHP form validation </ H2> 
<P> <span class = "error"> * required field. </ span> </ p>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>"> 
   名字: <input type="text" name="name" value="<?php echo $name;?>">
   <span class="error">* <?php echo $nameErr;?></span>
   <br><br>
   E-mail: <input type="text" name="email" value="<?php echo $email;?>">
   <span class="error">* <?php echo $emailErr;?></span>
   <br><br>
   网址: <input type="text" name="website" value="<?php echo $website;?>">
   <span class="error"><?php echo $websiteErr;?></span>
   <br><br>
   备注: <textarea name="comment" rows="5" cols="40"><?php echo $comment;?></textarea>
   <br><br>
   性别:
   <input type="radio" name="gender" <?php if (isset($gender) && $gender=="female") echo "checked";?>  value="female">女
   <input type="radio" name="gender" <?php if (isset($gender) && $gender=="male") echo "checked";?>  value="male">男
   <span class="error">* <?php echo $genderErr;?></span>
   <br><br>
   <input type="submit" name="submit" value="Submit"> 
</form>

<?php
echo "<h2>您输入的内容是:</h2>";
echo $name;
echo "<br>";
echo $email;
echo "<br>";
echo $website;
echo "<br>";
echo $comment;
echo "<br>";
echo $gender;
?>

</body>
</html>

Wu Yuxiong - born natural development of learning PHP: Form - verification message and URL

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