Insert Code into Header Only on Blog Posts

Yes. In your functions.php file, add something like the following: function my_post_header_function() { if( is_single() ) { // Your Code Goes Here } } add_action( ‘wp_head’, ‘my_post_header_function’ ); What this will do is execute this when wp_head() is fired. It will see if you’re on a single post (NOTE: This will not work on pages … Read more

Stop plugin from adding cache headers

Add this file to your plugin folder. <?php /* Plugin Name: Remove cache headers Description: Remove Cache-Control and Pragram header Version: 0.1 Author: Deluxe Themes */ function varnish_safe_http_headers() { if( !session_id() ) { session_start(); } header_remove (‘Cache-Control’); header_remove (“Pragma”); } add_action( ‘send_headers’, ‘varnish_safe_http_headers’ );

Warning: Cannot modify header information – headers already sent by

OK. Thanks to @Milo and @Krzysiek Dróżdż I changed the code in index.html file and it works now. I put get_header() after redirection method. <?php if (is_user_logged_in()): ?> <?php $expensesFormPage = get_page_by_title(‘formularz wydatkow’); ?> <?php wp_redirect(get_permalink($expensesFormPage->ID)); ?> <?php else: ?> <?php get_header(); ?> <h1>Aby korzystać z aplikacji musisz się zarejestrować.</h1> <a href=”https://wordpress.stackexchange.com/questions/307132/<?php echo wp_registration_url(); ?>”>Zarejestruj … Read more

Enable CORS for getting an inline SVG by URL

By using custom rewrite_url, I was able to hijack the request and set its CORS-friendly headers. class Cors_Media { const QUERY_VAR = ‘cors_media_id’; public function init() { add_action(‘init’, [$this, ‘add_rewrite_rule’]); add_filter(‘query_vars’, [$this, ‘query_vars’]); add_action(‘template_redirect’, [$this, ‘template_redirect’]); } public function query_vars(array $qs) { $qs[] = ‘cors_media_id’; return $qs; } public function add_rewrite_rule() { add_rewrite_rule( ‘^cors_media_id/([0-9]+)/?’, ‘index.php?cors_media_id=$matches[1]’, … Read more

How to make custom_header_setup() image as background image?

Because you have used it as an image. <img src=”https://…” height=”…” width=”…”/> This code is used to display images, not background images. Use it with text: <div style=”background-image: url(../images/test-background.gif); height: 200px; width: 400px; border: 1px solid black;”>Example of a DIV element with a background image:</div> Or without text: <div style=”background-image: url(../images/test-background.gif); height: 200px; width: 400px; … Read more

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