Contoh borang lengkap PHP

Bahagian ini menunjukkan cara untuk mengekalkan nilai dalam medan input selepas pengguna menyerahkan borang

PHP - Pastikan nilai input dalam borang

Selepas pengguna mengklik butang hantar, untuk memastikan bahawa nilai medan adalah Input adalah betul Kami memasukkan skrip PHP ke dalam elemen input HTML Setiap medan dinamakan: nama, e-mel dan tapak web. Dalam medan textarea dalam nota,

kami meletakkan skrip di antara teg <textarea>

Nilai output skrip PHP ialah: $name, $email, $website dan $comment variables.

Kemudian, kita juga perlu menyemak butang radio yang dipilih Untuk ini, kita mesti menetapkan atribut yang diperiksa (bukan atribut nilai butang radio):

<borang. method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
Nama: <input type="text" name="name" value= "<?php echo $name;?>">
<span class="error">* <?php echo $nameErr;?></span>
< br><br>
E-mel: <input type="text" name="email" value="<?php echo $email;?>">
<span class ="error">* <?php echo $emailErr;?></span>
<br><br>
URL: <input type="text" name=" laman web" value="<?php echo $website;?>">
<span class="error"><?php echo $websiteErr;?></span>
<br><br>
Nota: <textarea name="comment" rows="5" cols="40"><?php echo $comment;?></textarea>
<br><br>
Jantina:
<input type="radio" name="gender" <?php if (isset($gender) && $gender=="female ") echo "checked";?> value="female">female
<input type="radio" name="gender" <?php if (isset($jantina) && $jantina== "lelaki") gema "ditanda";?> value="lelaki">Lelaki
<span class="error">* <?php echo $genderErr;?></span>
<br><br>
<input type="submit" name="submit" value="Submit">
</form>

PHP - Contoh borang lengkap

<!DOCTYPE HTML>
 <html>
 <head>
     <meta charset="utf-8">
     <title>PHP中文网(runoob.com)</title>
     <style>
         .error {color: #FF0000;}
     </style>
 </head>
 <body>
 <?php
 // 定义变量并默认设置为空值
 $nameErr = $emailErr = $genderErr = $websiteErr = "";
 $name = $email = $gender = $comment = $website = "";
 
 if ($_SERVER["REQUEST_METHOD"] == "POST")
 {
     if (empty($_POST["name"]))
     {
         $nameErr = "名字是必需的";
     }
     else
     {
         $name = test_input($_POST["name"]);
         // 检测名字是否只包含字母跟空格
         if (!preg_match("/^[a-zA-Z ]*$/",$name))
         {
             $nameErr = "只允许字母和空格";
         }
     }
 
     if (empty($_POST["email"]))
     {
         $emailErr = "邮箱是必需的";
     }
     else
     {
         $email = test_input($_POST["email"]);
         // 检测邮箱是否合法
         if (!preg_match("/^[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+$/",$email))
         {
             $emailErr = "非法邮箱格式";
         }
     }
 
     if (empty($_POST["website"]))
     {
         $website = "";
     }
     else
     {
         $website = test_input($_POST["website"]);
         // 检测 URL 地址是否合法
         if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$website))
         {
             $websiteErr = "非法的 URL 的地址";
         }
     }
 
     if (empty($_POST["comment"]))
     {
         $comment = "";
     }
     else
     {
         $comment = test_input($_POST["comment"]);
     }
 
     if (empty($_POST["gender"]))
     {
         $genderErr = "性别是必需的";
     }
     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" 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="提交">
 </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>

Hasil berjalan program:

Meneruskan pembelajaran

fail baharu

<!DOCTYPE HTML> <html> <head> <meta charset="utf-8"> <title>PHP中文网(runoob.com)</title> <style> .error {color: #FF0000;} </style> </head> <body> <?php // 定义变量并默认设置为空值 $nameErr = $emailErr = $genderErr = $websiteErr = ""; $name = $email = $gender = $comment = $website = ""; if ($_SERVER["REQUEST_METHOD"] == "POST") { if (empty($_POST["name"])) { $nameErr = "名字是必需的"; } else { $name = test_input($_POST["name"]); // 检测名字是否只包含字母跟空格 if (!preg_match("/^[a-zA-Z ]*$/",$name)) { $nameErr = "只允许字母和空格"; } } if (empty($_POST["email"])) { $emailErr = "邮箱是必需的"; } else { $email = test_input($_POST["email"]); // 检测邮箱是否合法 if (!preg_match("/^[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+$/",$email)) { $emailErr = "非法邮箱格式"; } } if (empty($_POST["website"])) { $website = ""; } else { $website = test_input($_POST["website"]); // 检测 URL 地址是否合法 if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$website)) { $websiteErr = "非法的 URL 的地址"; } } if (empty($_POST["comment"])) { $comment = ""; } else { $comment = test_input($_POST["comment"]); } if (empty($_POST["gender"])) { $genderErr = "性别是必需的"; } 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" 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="提交"> </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>

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