I have a contact form in a WordPress page like this:

$( '#contact_form' ).bootstrapValidator({
    fields: {
        // ...
    submitHandler: function( formInstance ) {
        $.post( "../send-message", $("#contact_form").serialize(), function( result ) { 
            alert( pw_script_vars.State );            

When the form is submitted using the Ajax request it goes to another WordPress page titled /send-message that has PHP code to send an email, then it should return a success or failure value to the Ajax request to alert a success or failure message. I have tried using the wp_localize_script function in the functions.php file using a fixed value and it worked fine:

function enqueue_scripts() {
    wp_enqueue_script( 'pw_script', get_stylesheet_directory_uri().'/inc/js/functions.min.js', array( 'jquery' ) );
    wp_localize_script( 'pw_script', 'pw_script_vars', array( 'State' => 'success' ) );
add_action( 'wp_enqueue_scripts', 'enqueue_scripts' );

But when I tried to use the wp_localize_script in the /send-message WordPress page it failed to work. Here are the contents of the '/send-message' page :

    $sendSuccess = sendMessage();

    if( $sendSuccess )
        wp_localize_script( 'pw_script', 'pw_script_vars', array( 'State' => 'success' ) );
        wp_localize_script( 'pw_script', 'pw_script_vars', array( 'State' => 'failure' ) );

    function sendMessage() {
        //This function will send the email then it will return true or false.

Using wp_localize_script in the /send-message causes an undefined variable pw_script_vars in the JavaScript file.

How can I use wp_localize_script in a WordPress page other than functions.php?

  • Is send-message a normal WP page ? What does sendMessage() function contains? How are you defining success or failure on send-message page to pass it back to AJAX handler?
    – bravokeyl
    Commented Jul 4, 2016 at 17:32
  • $.post is a shorthand form $.ajax post , for which the third parameter is the success callback
    – bravokeyl
    Commented Jul 4, 2016 at 17:48
  • @bravokeyl ... Yes, '/send-message' is a normal WordPress page. sendMessage() function has php code to send an email. I didn't implement it yet but it'd return success if the email is sent or failure if the email wasn't sent. It is just a PHP boolean or String variable! .. The thread you have shared is a different example; he's using a php page(sendmessage.php) and not a WordPress page.
    – Brad
    Commented Jul 6, 2016 at 10:12

2 Answers 2


You cannot use wp_localize_script in page template. You have to use it in functions.php or your custom plugin, after you register your script, which is usually in the wp_enqueue_scripts action.


  • You can hook into 'enqueue_scripts' anytime you want, also in plugins or in a custom page template. This answer is completely wrong.
    – Jebble
    Commented Jul 5, 2016 at 12:50

You don't need to move your wp_localize_script anywhere else. Your problem lies within the fact that you try to use AJAX outside of WordPress. Let me refer to an earlier answer of me showing a simple version of how to use AJAX in WordPress here

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