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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 |
---|---|
1053 | * @global bool $concatenate_scripts |
1054 | * |
1055 | * @return array |
1056 | */ |
1057 | function print_head_scripts() { |
1058 | global $concatenate_scripts; |
1059 |
|
1060 | if ( ! did_action('wp_print_scripts') ) { |
1061 | /** This action is documented in wp-includes/functions.wp-scripts.php */ |
1062 | do_action( 'wp_print_scripts' ); |
1063 | } |
1064 |
|
1065 | $wp_scripts = wp_scripts(); |
1066 |
|
1067 | script_concat_settings(); |
1068 | $wp_scripts->do_concat = $concatenate_scripts; |
1069 | $wp_scripts->do_head_items(); |
1070 |
|
1071 | /** |
Line | Code |
1163 | * @since 2.8.0 |
1164 | * |
1165 | * @global WP_Scripts $wp_scripts |
1166 | * |
1167 | * @return array |
1168 | */ |
1169 | function wp_print_head_scripts() { |
1170 | if ( ! did_action('wp_print_scripts') ) { |
1171 | /** This action is documented in wp-includes/functions.wp-scripts.php */ |
1172 | do_action( 'wp_print_scripts' ); |
1173 | } |
1174 |
|
1175 | global $wp_scripts; |
1176 |
|
1177 | if ( ! ( $wp_scripts instanceof WP_Scripts ) ) { |
1178 | return array(); // no need to run if nothing is queued |
1179 | } |
1180 | return print_head_scripts(); |
1181 | } |