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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 |
|---|---|
| 132 | |
| 133 | $allowed_urls = array( home_url('/') ); |
| 134 | $admin_origin = parse_url( admin_url() ); |
| 135 | $home_origin = parse_url( home_url() ); |
| 136 | $cross_domain = ( strtolower( $admin_origin[ 'host' ] ) != strtolower( $home_origin[ 'host' ] ) ); |
| 137 | |
| 138 | if ( is_ssl() && ! $cross_domain ) |
| 139 | $allowed_urls[] = home_url( '/', 'https' ); |
| 140 | |
| 141 | $allowed_urls = array_unique( apply_filters( 'customize_allowed_urls', $allowed_urls ) ); |
| 142 | |
| 143 | $fallback_url = add_query_arg( array( |
| 144 | 'preview' => 1, |
| 145 | 'template' => $wp_customize->get_template(), |
| 146 | 'stylesheet' => $wp_customize->get_stylesheet(), |
| 147 | 'preview_iframe' => true, |
| 148 | 'TB_iframe' => 'true' |
| 149 | ), home_url( '/' ) ); |
| 150 | |