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POValidate fields of a form one by one
 

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  1. POValidate fields of a form one by one
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    <p>I have a form with 7 fields.When I submit it to "register.php" page it will process each field one by one and outputs the result. But this will output the results as whole. But I need to validate the data using ajax and collect the output one by one and display it to user as I leave the field.</p> <p>After this validations, also I need to send all fields in a single click; By using submit button.</p> <p>html file</p> <pre><code>&lt;form action="register.php" method="post" class="ajax"&gt; &lt;ul&gt; &lt;li&gt;Username*:&lt;br&gt; &lt;input type="text" name="username" required&gt;&lt;/li&gt; &lt;li&gt;Password*:&lt;br&gt; &lt;input type="password" name="password" required&gt;&lt;/li&gt; &lt;li&gt;Confirm the Password*:&lt;br&gt; &lt;input type="password" name="password_again" required&gt;&lt;/li&gt; &lt;li&gt;First Name*:&lt;br&gt; &lt;input type="text" name="first_name" required&gt;&lt;/li&gt; &lt;li&gt;Last Name:&lt;br&gt; &lt;input type="text" name="last_name"&gt;&lt;/li&gt; &lt;li&gt;Email*:&lt;br&gt; &lt;input type="text" name="email" required&gt;&lt;/li&gt; &lt;li&gt;&lt;input type="submit" value="Register"&gt;&lt;/li&gt; &lt;/ul&gt; &lt;/form&gt; </code></pre> <p>register.js file</p> <pre><code>$('form.ajax').on('submit',function(){ var that = $(this), url = that.attr('action'), type = that.attr('method'), data = {}; that.find('[name]').each(function(index,value){ var that =$(this), name =that.attr('name'), value = that.val(); data[name] = value; }); $.ajax({ url: url, type: type, data: data, success: function(response) { document.getElementById("demo").innerHTML= response; } }); return false; </code></pre> <p>});</p> <p>My php files:</p> <pre><code> if (empty($errors)=== TRUE) { if (user_exists($_POST['username'])=== TRUE) { $errors[] = 'Sorry, the Username \''. $_POST['username'] . '\' is already in use'; } if (preg_match("/\\s/", $_POST['username'])== TRUE) { $errors[] = 'Username must not contain any spaces'; } if (strlen($_POST['password']) &lt; 6) { $errors[] = 'Your password must be at least 6 characters'; } if ($_POST['password'] !== $_POST['password_again']) { $errors[] = 'Passwords do not match'; } if (filter_var($_POST['email'], FILTER_VALIDATE_EMAIL)=== FALSE) { $errors[] = 'Invalid email address'; } if (email_exists($_POST['email']) === TRUE) { $errors[] = 'Sorry, the email address \''. $_POST['email'] . '\' is already in use'; } } } if (isset($_GET['success']) &amp;&amp; empty($_GET['success'])) { echo "You've been registered successfully!"; } else{ if (empty($_POST)=== FALSE &amp;&amp; empty($errors) === TRUE) { $register_data = array( 'username' =&gt; $_POST['username'], 'password' =&gt; $_POST['password'], 'first_name'=&gt; $_POST['first_name'], 'last_name' =&gt; $_POST['last_name'], 'email' =&gt; $_POST['email'], ); register_user($register_data); header('Location: register.php?success'); exit(); }else if(empty($errors)=== FALSE){ </code></pre>
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    1. COWhy are you validating each individual field and then validating all of them again?
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    2. COno I just need to validate one by one. and then need to submit them to store at database.
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    3. COhere the problem is I can't post them separately using a single form.
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