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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 |
|---|---|
| 623 | * print_footer_scripts() is called in the footer to print these scripts. |
| 624 | * |
| 625 | * @since 2.8 |
| 626 | * @see wp_print_scripts() |
| 627 | */ |
| 628 | function print_head_scripts() { |
| 629 | global $wp_scripts, $concatenate_scripts; |
| 630 | |
| 631 | if ( ! did_action('wp_print_scripts') ) |
| 632 | do_action('wp_print_scripts'); |
| 633 | |
| 634 | if ( !is_a($wp_scripts, 'WP_Scripts') ) |
| 635 | $wp_scripts = new WP_Scripts(); |
| 636 | |
| 637 | script_concat_settings(); |
| 638 | $wp_scripts->do_items( 'l10n' ); |
| 639 | $wp_scripts->do_concat = $concatenate_scripts; |
| 640 | $wp_scripts->do_head_items(); |
| 641 | |
| Line | Code |
| 701 | * Prints the script queue in the HTML head on the front end. |
| 702 | * |
| 703 | * Postpones the scripts that were queued for the footer. |
| 704 | * wp_print_footer_scripts() is called in the footer to print these scripts. |
| 705 | * |
| 706 | * @since 2.8 |
| 707 | */ |
| 708 | function wp_print_head_scripts() { |
| 709 | if ( ! did_action('wp_print_scripts') ) |
| 710 | do_action('wp_print_scripts'); |
| 711 | |
| 712 | global $wp_scripts; |
| 713 | |
| 714 | if ( !is_a($wp_scripts, 'WP_Scripts') ) |
| 715 | return array(); // no need to run if nothing is queued |
| 716 | |
| 717 | return print_head_scripts(); |
| 718 | } |
| 719 | |