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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
This hook occurs 2 times in this file.
| Line | Code |
|---|---|
| 690 | * print_footer_scripts() is called in the footer to print these scripts. |
| 691 | * |
| 692 | * @since 2.8 |
| 693 | * @see wp_print_scripts() |
| 694 | */ |
| 695 | function print_head_scripts() { |
| 696 | global $wp_scripts, $concatenate_scripts; |
| 697 | |
| 698 | if ( ! did_action('wp_print_scripts') ) |
| 699 | do_action('wp_print_scripts'); |
| 700 | |
| 701 | if ( !is_a($wp_scripts, 'WP_Scripts') ) |
| 702 | $wp_scripts = new WP_Scripts(); |
| 703 | |
| 704 | script_concat_settings(); |
| 705 | $wp_scripts->do_concat = $concatenate_scripts; |
| 706 | $wp_scripts->do_head_items(); |
| 707 | |
| 708 | if ( apply_filters('print_head_scripts', true) ) |
| Line | Code |
| 769 | * Prints the script queue in the HTML head on the front end. |
| 770 | * |
| 771 | * Postpones the scripts that were queued for the footer. |
| 772 | * wp_print_footer_scripts() is called in the footer to print these scripts. |
| 773 | * |
| 774 | * @since 2.8 |
| 775 | */ |
| 776 | function wp_print_head_scripts() { |
| 777 | if ( ! did_action('wp_print_scripts') ) |
| 778 | do_action('wp_print_scripts'); |
| 779 | |
| 780 | global $wp_scripts; |
| 781 | |
| 782 | if ( !is_a($wp_scripts, 'WP_Scripts') ) |
| 783 | return array(); // no need to run if nothing is queued |
| 784 | |
| 785 | return print_head_scripts(); |
| 786 | } |
| 787 | |