Adding confirmation message while publishing content in WordPress

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Configuring confirmation message for WordPress classic editor

1. Log in to your WordPress site with an administrator account.
2. On the Dashboard in the left sidebar, click Appearance, and then click Theme Editor:
   
3. On the Theme Editor, select the Theme you want to edit from the dropdown:
   
4. The files for this selected theme are listed on the right column under Theme Files. Click on the file named “functions.php”:
   
5. Copy and insert the following code to the end of functions.php file and click Update File Button to save the changes:

add_action( 'admin_print_footer_scripts', 'wp_confirm_post' );

function wp_confirm_post() {

echo "

<script>
jQuery(document).ready(function($){

$('#publishing-action input[name=\"publish\"]').click(function() {

if(confirm('Are you sure you want to publish this?')) {

return true;

} else {

$('#publishing-action.spinner').hide();

$('#publishing-action img').hide();

$(this).removeClass('button-primary-disabled');

return false;

}

});

});

</script>
";

}

6. The confirmation message will be displayed on the classic editor when the Publish button is clicked:
   

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