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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 |
|---|---|
| 615 | * print_footer_scripts() is called in the footer to print these scripts. |
| 616 | * |
| 617 | * @since 2.8 |
| 618 | * @see wp_print_scripts() |
| 619 | */ |
| 620 | function print_head_scripts() { |
| 621 | global $wp_scripts, $concatenate_scripts; |
| 622 | |
| 623 | if ( ! did_action('wp_print_scripts') ) |
| 624 | do_action('wp_print_scripts'); |
| 625 | |
| 626 | if ( !is_a($wp_scripts, 'WP_Scripts') ) |
| 627 | $wp_scripts = new WP_Scripts(); |
| 628 | |
| 629 | script_concat_settings(); |
| 630 | $wp_scripts->do_items( 'l10n' ); |
| 631 | $wp_scripts->do_concat = $concatenate_scripts; |
| 632 | $wp_scripts->do_head_items(); |
| 633 | |
| Line | Code |
| 693 | * Prints the script queue in the HTML head on the front end. |
| 694 | * |
| 695 | * Postpones the scripts that were queued for the footer. |
| 696 | * wp_print_footer_scripts() is called in the footer to print these scripts. |
| 697 | * |
| 698 | * @since 2.8 |
| 699 | */ |
| 700 | function wp_print_head_scripts() { |
| 701 | if ( ! did_action('wp_print_scripts') ) |
| 702 | do_action('wp_print_scripts'); |
| 703 | |
| 704 | global $wp_scripts; |
| 705 | |
| 706 | if ( !is_a($wp_scripts, 'WP_Scripts') ) |
| 707 | return array(); // no need to run if nothing is queued |
| 708 | |
| 709 | return print_head_scripts(); |
| 710 | } |
| 711 | |