Always wait for init or wp_loaded, so you know all needed functions and classes are available. add_action( ‘wp_loaded’, ‘plugin_prefix_start’ ); function plugin_prefix_start() { if (isset($_REQUEST[‘action’]) && $_REQUEST[‘action’] == ‘update’) { doUpdate(); } }
Check the Filter Reference — there are filters like the_content, the_title, wp_title, etc. I’m not sure what you’d filter to get the logo description and footer — you might need to delve into your theme’s code. Also, make sure you sanitize anything you get from $_GET — never ever trust user-generated content. See Data Validation … Read more
You shouldn’t be calling get_the_ID() outside of a post loop, and the post ID is handed to you using the filter as a function argument: function insert_new_table( $post_id ){ So use $post_id Added notes Don’t use mysql_connect etc that extension was deprecated and is no longer included by default in newer versions of PHP. This … Read more
I always thought that the memory size was the limit for the string length, but according to the PHP documentation: string can be as large as up to 2GB (2147483647 bytes maximum) There is also the maximum allowed memory size (memory_limit) for the PHP script, to consider. Testing: Do not perform this on a production … Read more
Since you ruled out remove_action there is only one way you can do it. And you’ve guessed it: preg_repalce, substr mixture but with a little help and PHP DOM add_action(‘wp_footer’, ‘my_start_footer_ob’, 1); function my_start_footer_ob() { ob_start(“my_end_footer_ob_callback”); } add_action(‘wp_footer’, ‘my_end_footer_ob’, 1000); function my_end_footer_ob() { ob_end_flush(); } function my_end_footer_ob_callback($buffer) { // remove what you need from he … Read more
It must be pretty late in the action order because I’ve tried hooking to admin_notices from it and it doesn’t work. $function callback (param of add_submenu_page) is used to output the content of admin pages, so it runs when WordPress is actually displaying the markup (body) of page. That should be pretty clear because you … Read more
There is nothing technically wrong with that, but backslashes are hard to type on some keyboard layouts. On a German keyboard for example, you have to hit the right AltGr key plus \ at the same time. This is not easy to type (and one of the reasons why I use an English keyboard). Use … Read more
You should be able to use category_name=$matches[1] instead of cat=$matches[1] Generally speaking, you can use any built-in public query variable and custom ones, after some additional work, see the add_rewrite_rule() codex entry for more information.
The error message you are seeing is normal for that operation. By the time the transition_post_status hook fires, the HTTP page headers is already sent. By simply echoing an error message inside a hook like transition_post_status which was never intended to echo any output to the browser, as you did, you are actually trying to … Read more
Use update_post_meta(), because if the meta key already exists add_post_meta() will do nothing if $unique is true and otherwise won’t update neither, while update_post_meta(), well, it will update the value of a existing field or create it, if it doesn’t exist yet.