Do_action( 'wp_head' );

function hook_javascript() {
    ?>
        <script>
            alert('Page is loading...');
        </script>
    <?php
}
add_action('wp_head', 'hook_javascript');

Source: developer.wordpress.org

Do_action( 'wp_head' );

function hook_css() {
    ?>
        <style>
            .wp_head_example {
                background-color : #f1f1f1;
            }
        </style>
    <?php
}
add_action('wp_head', 'hook_css');

Source: developer.wordpress.org

Similar codes

0 vote202 views2 answers
Woocommerce_breadcrumb chnage house icon
PHP
0 vote256 views1 answer
Function id codeigniter 3
PHP CodeIgniter
0 vote176 views1 answer
Woocommerce get the price from session after add to cart
PHP
5 votes285 views1 answer
Php trim all array elements
PHP
2 votes161 views2 answers
Php unique string
PHP
0 vote182 views1 answer
Installing Maatwebsite excel import export package
PHP
1 vote161 views2 answers
Class 'App\Http\Controllers\Session' not found
PHP
3 votes207 views4 answers
Get base url in wordpress
PHP Wordpress
2 votes196 views1 answer
Custom rule laravel validation
PHP Laravel
0 vote157 views1 answer
Remove all items of an array except the last one in php
PHP