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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 |
|---|---|
| 2017 | * @global bool $concatenate_scripts |
| 2018 | * |
| 2019 | * @return array |
| 2020 | */ |
| 2021 | function print_head_scripts() { |
| 2022 | global $concatenate_scripts; |
| 2023 | |
| 2024 | if ( ! did_action( 'wp_print_scripts' ) ) { |
| 2025 | /** This action is documented in wp-includes/functions.wp-scripts.php */ |
| 2026 | do_action( 'wp_print_scripts' ); |
| 2027 | } |
| 2028 | |
| 2029 | $wp_scripts = wp_scripts(); |
| 2030 | |
| 2031 | script_concat_settings(); |
| 2032 | $wp_scripts->do_concat = $concatenate_scripts; |
| 2033 | $wp_scripts->do_head_items(); |
| 2034 | |
| 2035 | /** |
| Line | Code |
| 2137 | * @global WP_Scripts $wp_scripts |
| 2138 | * |
| 2139 | * @return array |
| 2140 | */ |
| 2141 | function wp_print_head_scripts() { |
| 2142 | global $wp_scripts; |
| 2143 | |
| 2144 | if ( ! did_action( 'wp_print_scripts' ) ) { |
| 2145 | /** This action is documented in wp-includes/functions.wp-scripts.php */ |
| 2146 | do_action( 'wp_print_scripts' ); |
| 2147 | } |
| 2148 | |
| 2149 | if ( ! ( $wp_scripts instanceof WP_Scripts ) ) { |
| 2150 | return array(); // No need to run if nothing is queued. |
| 2151 | } |
| 2152 | |
| 2153 | return print_head_scripts(); |
| 2154 | } |
| 2155 | |