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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 |
|---|---|
| 173 | $allowed_urls[] = home_url( '/', 'https' ); |
| 174 | |
| 175 | /** |
| 176 | * Filter the list of URLs allowed to be clicked and followed in the Customizer preview. |
| 177 | * |
| 178 | * @since 3.4.0 |
| 179 | * |
| 180 | * @param array $allowed_urls An array of allowed URLs. |
| 181 | */ |
| 182 | $allowed_urls = array_unique( apply_filters( 'customize_allowed_urls', $allowed_urls ) ); |
| 183 | |
| 184 | $fallback_url = add_query_arg( array( |
| 185 | 'preview' => 1, |
| 186 | 'template' => $wp_customize->get_template(), |
| 187 | 'stylesheet' => $wp_customize->get_stylesheet(), |
| 188 | 'preview_iframe' => true, |
| 189 | 'TB_iframe' => 'true' |
| 190 | ), home_url( '/' ) ); |
| 191 | |