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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 |
---|---|
2086 | * @global bool $concatenate_scripts |
2087 | * |
2088 | * @return array |
2089 | */ |
2090 | function print_head_scripts() { |
2091 | global $concatenate_scripts; |
2092 |
|
2093 | if ( ! did_action( 'wp_print_scripts' ) ) { |
2094 | /** This action is documented in wp-includes/functions.wp-scripts.php */ |
2095 | do_action( 'wp_print_scripts' ); |
2096 | } |
2097 |
|
2098 | $wp_scripts = wp_scripts(); |
2099 |
|
2100 | script_concat_settings(); |
2101 | $wp_scripts->do_concat = $concatenate_scripts; |
2102 | $wp_scripts->do_head_items(); |
2103 |
|
2104 | /** |
Line | Code |
2206 | * @global WP_Scripts $wp_scripts |
2207 | * |
2208 | * @return array |
2209 | */ |
2210 | function wp_print_head_scripts() { |
2211 | global $wp_scripts; |
2212 |
|
2213 | if ( ! did_action( 'wp_print_scripts' ) ) { |
2214 | /** This action is documented in wp-includes/functions.wp-scripts.php */ |
2215 | do_action( 'wp_print_scripts' ); |
2216 | } |
2217 |
|
2218 | if ( ! ( $wp_scripts instanceof WP_Scripts ) ) { |
2219 | return array(); // No need to run if nothing is queued. |
2220 | } |
2221 |
|
2222 | return print_head_scripts(); |
2223 | } |
2224 |
|