php完整表單驗證例項
阿新 • • 發佈:2018-11-13
<!DOCTYPE HTML> <html> <head> <style> .error{color:#FF0000} </style> </head> <body> <?php $nameErr=$emailErr=$genderErr=$websiteErr=""; $name=$email=$comment=$gender=$website=""; if($_SERVER["REQUEST_METHOD"]=="POST") { if(empty($_POST["name"])) { $nameErr="使用者名稱是必須的"; } else { $name=test_input($_POST["name"]); if(!preg_match("/^[a-zA-Z ]*$/",$name)) { $nameErr="使用者名稱只能為數字和空格"; } } if (empty($_POST["email"])) { $emailErr = "郵箱是必填的"; } else { $email = test_input($_POST["email"]); // check if e-mail address syntax is valid if (!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/",$email)) { $emailErr = "不是郵箱格式"; } } if (empty($_POST["website"])) { $website = ""; } else { $website = test_input($_POST["website"]); // check if URL address syntax is valid (this regular expression also allows dashes in the URL) if (!preg_match("/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i",$website)) { $websiteErr = "不是url"; } } if (empty($_POST["comment"])) { $comment = ""; } else { $comment = test_input($_POST["comment"]); } if (empty($_POST["gender"])) { $genderErr = "性別是必須的"; } else { $gender = test_input($_POST["gender"]); } } function test_input($data) { $data=$trim($data); $data=$stripslashes($data); $data=$htmlspecialchars($data); return $data; } ?> <h2>php表單驗證例項</h2> <p><span class="error"> * 必須輸入的</span></p> <form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>"> Name: <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> Website: <input type="text" name="website" value="<?php echo $website;?>"> <span class="error"><?php echo $websiteErr;?></span> <br><br> Comment: <textarea name="comment" rows="5" cols="40"><?php echo $comment;?></textarea> <br><br> Gender: <input type="radio" name="gender" <?php if (isset($gender) && $gender=="female") echo "checked";?> value="female">Female <input type="radio" name="gender" <?php if (isset($gender) && $gender=="male") echo "checked";?> value="male">Male <span class="error">* <?php echo $genderErr;?></span> <br><br> <input type="submit" name="submit" value="Submit"> </form> <?php echo "<h2>Your Input:</h2>"; echo $name; echo "<br>"; echo $email; echo "<br>"; echo $website; echo "<br>"; echo $comment; echo "<br>"; echo $gender; ?> </body> </html>