check email if valid/duplicate from database using codeigniter

Question

i have a code from tutorial that doesn't work well. I don't know why, i am a beginner in codeigniter. I want to submit the button update, if duplicate a text will response below the textbox that the email is exist and also check it if the email is a valid email syntax.

Here is my html code :

<form id="reg_form" class="form-horizontal">
    <div class="form-group">
    <label class="control-label col-sm-3" for="curEmail">New Email</label>
    <div class="col-sm-6">
    <input type="text" class="form-control" name="email" id="email" placeholder="[email protected]" required data-fv-emailaddress-message="The value is not a valid email address">                                                           
    </div>
    <div class="col-sm-8 ajax_response_result"></div>                                                       
    </div>
    <button onclick="editEmail()" class="btn btn-success btn-sm "><i class="fa fa-refresh"></i> Update Profile</button>
</form>

Here is my ajax:

function editEmail() {

    jQuery.ajax({
    type: "POST",
    url: "<?php echo site_url('manager/profile/check_email') ?>",    
    data: $("#reg_form").serialize(),
    success: function(res) {
     $(".ajax_response_result").html(res);

     }
    });

}

My CodeIgniter Controller:

public function check_email() {
         $this->form_validation->set_rules('email', 'Email', 'required|is_unique[user.user_email]|valid_email');

         $this->form_validation->set_message('is_unique', 'The %s is already taken');
         if ($this->form_validation->run() == FALSE):
                echo 'Enter valid email.';          
        else :           
            unset($_POST);
            echo 'Available';
        endif;

  }

thank you for your answer sir. I think for unique it is from database. if it is exist. but it doesnt work well. — Jc John
– Jc John, Commented Oct 7, 2016 at 9:19
yes sir. i already did. there are no errors sir. but the code behaves nothing. — Jc John
– Jc John, Commented Oct 7, 2016 at 9:22
yes, after this success: function(res) { $(".ajax_response_result").html(res); } }); add return false; — devpro
– devpro, Commented Oct 7, 2016 at 9:32

Rejoanul Alam · Accepted Answer · 2016-10-07 09:31:05Z

2

There are several issue in your code, Revised & given below

HTML (method POST was not there in your code, editEmail here event missing etc etc)

<form id="reg_form" class="form-horizontal" method="POST">
    <div class="form-group">
    <label class="control-label col-sm-3" for="curEmail">New Email</label>
    <div class="col-sm-6">
    <input type="text" class="form-control" name="email" id="email" placeholder="[email protected]" required data-fv-emailaddress-message="The value is not a valid email address">                                                           
    </div>
    <div class="col-sm-8 ajax_response_result"></div>                                                       
    </div>
    <button onclick="editEmail(event)" class="btn btn-success btn-sm "><i class="fa fa-refresh"></i> Update Profile</button>
</form>

Now JS (e.preventDefault(); used for prevent form submitting etc etc)

function editEmail(e) {
    e.preventDefault();
    jQuery.ajax({
    type: "POST",
    url: "<?php echo site_url('manager/profile/check_email') ?>",    
    data: $("#reg_form").serialize(),
    success: function(res) {
     $(".ajax_response_result").html(res);

     }
    });

}

answered Oct 7, 2016 at 9:31

Rejoanul Alam

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5 Comments

Jc John Over a year ago

@hey sir. very great answer sir. thanks for editting my code. it helps me very well. thank you very much sir.

Rejoanul Alam Over a year ago

@JcJohn enjoy your day

Jc John Over a year ago

hello sir. may i ask again ? why is my error message from $this->form_validation->set_message('is_unique', 'The %s is already taken'); is not working ?

Rejoanul Alam Over a year ago

to get validation error all you have to do is use echo strip_tags(validation_errors()) instead echo 'Enter valid email.'; in controller

Jc John Over a year ago

@RejoanulAlam sir, i mean the set_message error for every rules of form_validation

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