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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 |
---|---|
2085 | * @global bool $concatenate_scripts |
2086 | * |
2087 | * @return array |
2088 | */ |
2089 | function print_head_scripts() { |
2090 | global $concatenate_scripts; |
2091 |
|
2092 | if ( ! did_action( 'wp_print_scripts' ) ) { |
2093 | /** This action is documented in wp-includes/functions.wp-scripts.php */ |
2094 | do_action( 'wp_print_scripts' ); |
2095 | } |
2096 |
|
2097 | $wp_scripts = wp_scripts(); |
2098 |
|
2099 | script_concat_settings(); |
2100 | $wp_scripts->do_concat = $concatenate_scripts; |
2101 | $wp_scripts->do_head_items(); |
2102 |
|
2103 | /** |
Line | Code |
2205 | * @global WP_Scripts $wp_scripts |
2206 | * |
2207 | * @return array |
2208 | */ |
2209 | function wp_print_head_scripts() { |
2210 | global $wp_scripts; |
2211 |
|
2212 | if ( ! did_action( 'wp_print_scripts' ) ) { |
2213 | /** This action is documented in wp-includes/functions.wp-scripts.php */ |
2214 | do_action( 'wp_print_scripts' ); |
2215 | } |
2216 |
|
2217 | if ( ! ( $wp_scripts instanceof WP_Scripts ) ) { |
2218 | return array(); // No need to run if nothing is queued. |
2219 | } |
2220 |
|
2221 | return print_head_scripts(); |
2222 | } |
2223 |
|