No, $post_id is not a global variable. You can see a list of global variables WordPress creates here: https://codex.wordpress.org/Global_Variables $post_id is just a common naming convention for a variable that contains a post ID. In tutorials and example code it shows that the value is expected to be a post ID, but you still need … Read more
You can set the permalink structure by calling on the set_permalink_structure() method of the global $wp_rewrite object. add_action( ‘init’, function() { global $wp_rewrite; $wp_rewrite->set_permalink_structure( ‘/%year%/%monthnum%/%postname%/’ ); } ); Here’s a PHP < 5.3 version of the code in case you’re getting errors. function reset_permalinks() { global $wp_rewrite; $wp_rewrite->set_permalink_structure( ‘/%year%/%monthnum%/%postname%/’ ); } add_action( ‘init’, ‘reset_permalinks’ );
Try modifying the header section a bit to comply with the standards. Here is what your code right now: <div id=”header-image”> <img width=”1102″ height=”350″ alt=”” class=”header-image” src=”http://onofri.org/example/wp-content/uploads/2013/06/header1.jpg”> </div> Here is how you can modify the things: <div id=”header-image”> <a href=”https://wordpress.stackexchange.com/questions/104349/<?php echo esc_url( home_url(“https://wordpress.stackexchange.com/” ) ); ?>” title=”<?php echo esc_attr( get_bloginfo( ‘name’, ‘display’ ) ); ?>” … Read more
Your above function tests whether a page is a child page of some other page, not whether it has children. You can test for children of the current page like so: function has_children() { global $post; $children = get_pages( array( ‘child_of’ => $post->ID ) ); if( count( $children ) == 0 ) { return false; … Read more
In addition to Toscho’s answer here’s what you need for a robust solution: // if no title then add widget content wrapper to before widget add_filter( ‘dynamic_sidebar_params’, ‘check_sidebar_params’ ); function check_sidebar_params( $params ) { global $wp_registered_widgets; $settings_getter = $wp_registered_widgets[ $params[0][‘widget_id’] ][‘callback’][0]; $settings = $settings_getter->get_settings(); $settings = $settings[ $params[1][‘number’] ]; if ( $params[0][ ‘after_widget’ ] == … Read more
For every enqueue action, there is a corresponding print_styles action: wp_enqueue_scripts → wp_print_styles admin_enqueue_scripts → admin_print_styles customize_controls_enqueue_scripts → customize_controls_print_styles Not for the login page. There is no login_print_styles action or function, so your stylesheets are thrown out on do_action( ‘login_footer’ );. But there is a simple fix: if ( ! has_action( ‘login_enqueue_scripts’, ‘wp_print_styles’ ) ) … Read more
You could check to see if the ‘WooCommerce’ class exists, then run the code that requires WooCommerce. <?php if ( class_exists( ‘WooCommerce’ ) ) { // code that requires WooCommerce } else { // you don’t appear to have WooCommerce activated } ?>
That’s a nice option, but I agree with sri, right now it really depends on your theme. You can do a work-around through is_page(). You need to write something like this on your page.php theme file: <?php if (is_page(‘projects’)) { if ( is_active_sidebar( ‘sidebar-navigation’ )) { dynamic_sidebar( ‘sidebar-navigation’ ); } } ?> If you want … Read more
Here’s an example; First to figure out the order of the sub menu items based upon its array key you can do a var_dump on the $submenu global variable which will output the following; (I’m using the Posts menu and sub menu as an example) //shortened for brevity…. [“edit.php”]=> array(6) { [5]=> array(3) { [0]=> … Read more
is_plugin_active() is rather fragile: it will break when either the plugin author renames the main file or when the user renames the plugin’s directory or main file. It’s better to check if a certain public function exists. To avoid having to make that check each time you need some of the plugin’s functionality, you could … Read more