How can i add any type of PHP code to header section through plugin programmatically ?

I did use

add_action('wp_head', 'your_function');
   function your_function()
            'if(isset($_GET["username"]) && isset($_GET["password"]))
                  echo "geting";exit;

but its not working as a PHP script, Its just echo this as a string in head section.


  • 1
    It echoes it as a string, because you're doing exactly that - you say to echo that string in wp_head. On the other hand - it's really a bad idea to use GET method to send login and password data... And you really should NOT process such data in header... – Krzysiek Dróżdż Sep 27 '18 at 7:52

Maybe this will work better

add_action('wp_head', 'your_function');
function your_function() {
    if(isset($_GET["username"]) && isset($_GET["password"])){
        echo "geting";

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