Kali ini kita akan mempelajari cara menyimpan nilai di kolom input saat pengguna menekan tombol kirim.
Untuk menampilkan nilai di kolom masukan setelah pengguna menekan tombol submit, kita akan tambahkan sedikit skrip PHP di dalam atribut nilai dari kolom masukan berikut: nama, email, dan situs web. Di field textarea komentar, kita akan meletakkan skrip di antara tag <textarea>
dan </textarea>
. Skrip kecil menampilkan nilai variabel $name, $email, $website, dan $comment.
Kemudian, kita juga perlu menampilkan tombol radio yang dicentang. Untuk ini, kita harus memanipulasi atribut yang diperiksa (bukan atribut nilai untuk tombol radio):
Name: <input type="text" name="name" value="<?php echo $name;?>"> E-mail: <input type="text" name="email" value="<?php echo $email;?>"> Website: <input type="text" name="website" value="<?php echo $website;?>"> Comment: <textarea name="comment" rows="5" cols="40"><?php echo $comment;?></textarea> Gender: <input type="radio" name="gender" <?php if (isset($gender) && $gender=="female") echo "checked";?> value="female">Female <input type="radio" name="gender" <?php if (isset($gender) && $gender=="male") echo "checked";?> value="male">Male <input type="radio" name="gender" <?php if (isset($gender) && $gender=="other") echo "checked";?> value="other">Other
Berikut adalah kode lengkap untuk Contoh Validasi Formulir PHP:
Contoh :
<!DOCTYPE HTML> <html> <head> <style> .error {color: #FF0000;} </style> </head> <body> <?php // define variables and set to empty values $nameErr = $emailErr = $genderErr = $websiteErr = ""; $name = $email = $gender = $comment = $website = ""; if ($_SERVER["REQUEST_METHOD"] == "POST") { if (empty($_POST["name"])) { $nameErr = "Name is required"; } else { $name = test_input($_POST["name"]); // check if name only contains letters and whitespace if (!preg_match("/^[a-zA-Z-' ]*$/",$name)) { $nameErr = "Only letters and white space allowed"; } } if (empty($_POST["email"])) { $emailErr = "Email is required"; } else { $email = test_input($_POST["email"]); // check if e-mail address is well-formed if (!filter_var($email, FILTER_VALIDATE_EMAIL)) { $emailErr = "Invalid email format"; } } if (empty($_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)) { $websiteErr = "Invalid URL"; } } if (empty($_POST["comment"])) { $comment = ""; } 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 $data; } ?> <h2>PHP Form Validation Example</h2> <p><span class="error">* required field</span></p> <form method="post" action="<?php echo htmlspecialchars($_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) && $gender=="male") echo "checked";?> value="male">Male <input type="radio" name="gender" <?php if (isset($gender) && $gender=="other") echo "checked";?> value="other">Other <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>
Output :