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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 |
---|---|
1828 | * @global bool $concatenate_scripts |
1829 | * |
1830 | * @return array |
1831 | */ |
1832 | function print_head_scripts() { |
1833 | global $concatenate_scripts; |
1834 |
|
1835 | if ( ! did_action( 'wp_print_scripts' ) ) { |
1836 | /** This action is documented in wp-includes/functions.wp-scripts.php */ |
1837 | do_action( 'wp_print_scripts' ); |
1838 | } |
1839 |
|
1840 | $wp_scripts = wp_scripts(); |
1841 |
|
1842 | script_concat_settings(); |
1843 | $wp_scripts->do_concat = $concatenate_scripts; |
1844 | $wp_scripts->do_head_items(); |
1845 |
|
1846 | /** |
Line | Code |
1946 | * @since 2.8.0 |
1947 | * |
1948 | * @global WP_Scripts $wp_scripts |
1949 | * |
1950 | * @return array |
1951 | */ |
1952 | function wp_print_head_scripts() { |
1953 | if ( ! did_action( 'wp_print_scripts' ) ) { |
1954 | /** This action is documented in wp-includes/functions.wp-scripts.php */ |
1955 | do_action( 'wp_print_scripts' ); |
1956 | } |
1957 |
|
1958 | global $wp_scripts; |
1959 |
|
1960 | if ( ! ( $wp_scripts instanceof WP_Scripts ) ) { |
1961 | return array(); // No need to run if nothing is queued. |
1962 | } |
1963 | return print_head_scripts(); |
1964 | } |