Wordpress validation for title - wordpress

Question

Need to add blank and already exist validation for 'supports' => array( 'title') on my custom post type. But i dont want to use any plugin for this.
Thanks in advance.
add_action( 'admin_notices', 'custom_error_notice' );
function custom_error_notice(){
global $current_screen, $post;
if ( $current_screen->parent_base == 'edit' ){
if((!$post->post_name) && $_GET['post']) {
wp_redirect(admin_url('post-new.php?empty=1'));
}
if($_GET['empty']) echo '<div class="error"><p>Warning - Please fill up all fields correctly!</p></div>';
}
}
But this not working properly.

Answer 1

This may help you:-
add_action('save_post', 'album_save_post', 10, 2);
function album_save_post( $album_id, $album ) {
if( defined('DOING_AUTOSAVE') && DOING_AUTOSAVE || $album->post_type != 'music_album') return;
// echo '<pre>';
// print_r($album);
// echo '</pre>';
// die();
$errors = array();
// Validation filters
$title = $album->post_title;
if ( ! $title ) {
$errors['title'] = "The title is required";
}
// if we have errors lets setup some messages
if (! empty($errors)) {
// we must remove this action or it will loop for ever
remove_action('save_post', 'album_save_post');
// save the errors as option
update_option('album_errors', $errors);
// Change post from published to draft
$album->post_status = 'draft';
// update the post
wp_update_post( $album );
// we must add back this action
add_action('save_post', 'album_save_post');
// admin_notice is create by a $_GET['message'] with a number that wordpress uses to
// display the admin message so we will add a filter for replacing default admin message with a redirect
add_filter( 'redirect_post_location', 'album_post_redirect_filter' );
}
}
function album_post_redirect_filter( $location ) {
// remove $_GET['message']
$location = remove_query_arg( 'message', $location );
// add our new query sting
$location = add_query_arg( 'album', 'error', $location );
// return the location query string
return $location;
}
// Add new admin message
add_action( 'admin_notices', 'album_post_error_admin_message' );
function album_post_error_admin_message() {
if ( isset( $_GET['album'] ) && $_GET['album'] == 'error' ) {
// lets get the errors from the option album_errors
$errors = get_option('album_errors');
// now delete the option album errors
delete_option('album_errors');
$display = '<div id="notice" class="error"><ul>';
// Because we are storing as an array we should loop through them
foreach ( $errors as $error ) {
$display .= '<li>' . $error . '</li>';
}
$display .= '</ul></div>';
// finally echo out our display
echo $display;
// add some jQuery
?>
<script>
jQuery(function($) {
$("#title").css({"border": "1px solid red"})
});
</script>
<?php
}
}

Answer 2

i got the solution.
/** ADD Validation for title */
function force_post_title_init()
{
wp_enqueue_script('jquery');
}
function force_post_title()
{
echo "<script type='text/javascript'>\n";
echo "
jQuery('#publish').click(function(){
var testervar = jQuery('[id^=\"titlediv\"]')
.find('#title');
if (testervar.val().length < 1)
{
jQuery('[id^=\"titlediv\"]').css('border', '1px solid red');
alert('Post title is required');
return false;
}
});
";
echo "</script>\n";
}
add_action('admin_init', 'force_post_title_init');
add_action('edit_form_advanced', 'force_post_title');
// Add this row below to get the same functionality for page creations.
add_action('edit_page_form', 'force_post_title');
May be this also help for all of you.