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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 |
---|---|
1979 | * @global bool $concatenate_scripts |
1980 | * |
1981 | * @return array |
1982 | */ |
1983 | function print_head_scripts() { |
1984 | global $concatenate_scripts; |
1985 |
|
1986 | if ( ! did_action( 'wp_print_scripts' ) ) { |
1987 | /** This action is documented in wp-includes/functions.wp-scripts.php */ |
1988 | do_action( 'wp_print_scripts' ); |
1989 | } |
1990 |
|
1991 | $wp_scripts = wp_scripts(); |
1992 |
|
1993 | script_concat_settings(); |
1994 | $wp_scripts->do_concat = $concatenate_scripts; |
1995 | $wp_scripts->do_head_items(); |
1996 |
|
1997 | /** |
Line | Code |
2099 | * @global WP_Scripts $wp_scripts |
2100 | * |
2101 | * @return array |
2102 | */ |
2103 | function wp_print_head_scripts() { |
2104 | global $wp_scripts; |
2105 |
|
2106 | if ( ! did_action( 'wp_print_scripts' ) ) { |
2107 | /** This action is documented in wp-includes/functions.wp-scripts.php */ |
2108 | do_action( 'wp_print_scripts' ); |
2109 | } |
2110 |
|
2111 | if ( ! ( $wp_scripts instanceof WP_Scripts ) ) { |
2112 | return array(); // No need to run if nothing is queued. |
2113 | } |
2114 |
|
2115 | return print_head_scripts(); |
2116 | } |
2117 |
|