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POPHP SQL Form validation
 

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  1. POPHP SQL Form validation
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    <p>I want to make a simple form which displays error if a field has not been inputted. I don't know how to do it. Here's my code: php code:</p> <pre><code>&lt;?php //include the connection file require_once('connection.php'); //save the data on the DB and send the email if(isset($_POST['action']) &amp;&amp; $_POST['action'] == 'submitform') { //recieve the variables $name = $_POST['name']; $email = $_POST['email']; $message = $_POST['message']; $ip = gethostbyname($_SERVER['REMOTE_ADDR']); //save the data on the DB mysql_select_db($database_connection, $connection); $insert_query = sprintf("INSERT INTO feedback (name, email, message, date, ip) VALUES (%s, %s, %s, NOW(), %s)", sanitize($name, "text"), sanitize($email, "text"), sanitize($message, "text"), sanitize($ip, "text")); $result = mysql_query($insert_query, $connection) or die(mysql_error()); if($result) { //send the email $to = "abc@xyz.com"; $subject = "New message from the website"; //headers and subject $headers = "MIME-Version: 1.0\r\n"; $headers .= "Content-type: text/html; charset=iso-8859-1\r\n"; $headers .= "From: ".$name." &lt;".$email."&gt;\r\n"; $body = "New contact&lt;br /&gt;"; $body .= "Name: ".$name."&lt;br /&gt;"; $body .= "Email: ".$email."&lt;br /&gt;"; $body .= "Message: ".$message."&lt;br /&gt;"; $body .= "IP: ".$ip."&lt;br /&gt;"; mail($to, $subject, $body, $headers); //ok message echo "Your message has been sent"; } } function sanitize($value, $type) { $value = (!get_magic_quotes_gpc()) ? addslashes($value) : $value; switch ($type) { case "text": $value = ($value != "") ? "'" . $value . "'" : "NULL"; break; case "long": case "int": $value = ($value != "") ? intval($value) : "NULL"; break; case "double": $value = ($value != "") ? "'" . doubleval($value) . "'" : "NULL"; break; case "date": $value = ($value != "") ? "'" . $value . "'" : "NULL"; break; } return $value; } ?&gt; &lt;form id="ContactForm" method="post" action="mail.php"&gt; &lt;div class="wrapper"&gt;&lt;input class="input" name="name" id="name" type="text" value="Name:" onBlur="if(this.value=='') this.value='Name:'" onFocus="if(this.value =='Name:' ) this.value=''" &gt;&lt;/div&gt; &lt;div class="wrapper"&gt;&lt;input class="input" name="email" id="email" type="text" value="E-mail:" onBlur="if(this.value=='') this.value='E-mail:'" onFocus="if(this.value =='E-mail:' ) this.value=''" &gt;&lt;/div&gt; &lt;div class="textarea_box"&gt;&lt;textarea cols="1" rows="1" onBlur="if(this.value=='') this.value='Message:'" onFocus="if(this.value =='Message:' ) this.value=''" &gt;Message:&lt;/textarea&gt;&lt;/div&gt; &lt;input type="hidden" id="action" name="action" value="submitform" /&gt; &lt;input type="submit" class="button" id="submit" name="submit" value="Submit" /&gt; &lt;input type="reset" class="button" id="reset" name="reset" value="Reset" /&gt; &lt;/form&gt; </code></pre>
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    1. USJohn Conde
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      1. VTUpMod
    1. COyou can validate your form using php on the server side but I would recommend using javascript/jQuery to validate the form inputs before the form is submitted and then also checking server side with PHP. There are loads of jQuery form validation plugins that make it really simple and easy to do.
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      1. USmartincarlin87
    2. CO@martincarlin87 Well, i prefer doing the checks server side. Because not every client enabled javascript...
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      1. USRon van der Heijden
    3. COyes, but as I said, you can do BOTH.
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      1. USmartincarlin87
 

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