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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.
Line | Code |
---|---|
1577 |
|
1578 | /** |
1579 | * Fires once the Customizer preview has initialized and JavaScript |
1580 | * settings have been printed. |
1581 | * |
1582 | * @since 3.4.0 |
1583 | * |
1584 | * @param WP_Customize_Manager $this WP_Customize_Manager instance. |
1585 | */ |
1586 | do_action( 'customize_preview_init', $this ); |
1587 | } |
1588 |
|
1589 | /** |
1590 | * Filter the X-Frame-Options and Content-Security-Policy headers to ensure frontend can load in customizer. |
1591 | * |
1592 | * @since 4.7.0 |
1593 | * @access public |
1594 | * |
1595 | * @param array $headers Headers. |