mjd82

Increasing the varchar() did the trick in the end.

I fixed this by manually creating a new database row using phpmyadmin and now everything seems to work fine. Very strange…

Just for completeness, here is my javascript AJAX handler. The error printed in the console is the result of the error callback (console.log(errorThrown))

jQuery(document).ready(function() {

  jQuery('#submit-img').click(function(e) {
    e.preventDefault();
    jQuery.ajax({
      url: MyAjax.ajaxURL,
      type: 'post',
      data: {
        action: 'ajax-submit-handler',
        postID: MyAjax.postID,
        nonceID: MyAjax.nonceID,
        imgURL: jQuery('#img-url').val()
      },
      success: function(response) {
        console.log(response.data);
      },
      error: function(jqXHR, textStatus, errorThrown) {
        console.log(errorThrown);
      }
    });
  });

});

where MyAjax is defined with wp_localize_script.