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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.
| Line | Code |
|---|---|
| 575 | /** |
| 576 | * Prints the scripts that were queued for the footer on admin pages. |
| 577 | * |
| 578 | * @since 2.8 |
| 579 | */ |
| 580 | function print_footer_scripts() { |
| 581 | global $wp_scripts, $concatenate_scripts; |
| 582 | |
| 583 | if ( ! did_action('wp_print_footer_scripts') ) |
| 584 | do_action('wp_print_footer_scripts'); |
| 585 | |
| 586 | if ( !is_a($wp_scripts, 'WP_Scripts') ) |
| 587 | return array(); // No need to run if not instantiated. |
| 588 | |
| 589 | script_concat_settings(); |
| 590 | $wp_scripts->do_concat = $concatenate_scripts; |
| 591 | $wp_scripts->do_footer_items(); |
| 592 | |
| 593 | if ( apply_filters('print_footer_scripts', true) ) |