validation

Settings API validation callback

If you have an options page (which should be inside one form), then all data is sent from that form, regardless of whether or not the option has been changed. The array received for validation is the data received from (your part of) the form. If the data is ’empty’ it is because the data … Read more

Settings API – getting hidden input / submit button’s name

Using $_POST is too low level. Simply give it the same name as your other options. When you options are displayed they should have the names of the form: my_settings[a_particular_option]. For instance: <input name=”my_settings[some_input_option]”/> Then for your hidden input and submit button: <input type=”hiddden” name=”my_settings[foo]” value=”bar”/> <input name=”my_settings[SubmitButton]” type=”submit” class=”button-primary” value=”<?php _e(‘Save Changes’); ?>”/> In … Read more

Make post_content and other custom fields required

Don’t rely entirely on JavaScript validations. Use below hook for Server side validation. function check_if_post_content_set( $maybe_empty, $postarr ) { // Check if post is already created. IMPORTANT if($postarr[‘ID’] && (int)$postarr[‘ID’] > 0){ if( !$postarr[‘post_content’] OR $postarr[‘post_content’] == ” OR $postarr[‘post_content’] == NULL ){ $maybe_empty = true; } } return $maybe_empty; } add_filter( ‘wp_insert_post_empty_content’, ‘check_if_post_content_set’, 999999, … Read more

Display all WP Errors together during form validation

Sorry to bother . It was one of my other functions which was limiting the error to echo only once. Here is the previous code : function display_message( $message = false ) { if( is_wp_error( $message ) ) { echo ‘<div class=”error”><p>’ . $message->get_error_message() . ‘</p></div>’; } It worked fine when i changed it too … Read more

don’t publish custom post type post if a meta data field isn’t valid

You can stop the post from saving all together with minor JQuery hacks and validate the fields before saving on the client side or server side with ajax: first we add our JavaScript to capture the submit/publish event and use it to submit our own ajax function before the actual submit: add_action(‘wp_print_scripts’,’my_publish_admin_hook’); function my_publish_admin_hook(){ if … Read more

protect user submitted posts

Take a look at WordPress codex Data Validation entry, it covers most of the validation functions that come built-in with WordPress which you can use to validate your form submission.

+ More