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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 |
|---|---|
| 205 | $allowed_urls[] = home_url( '/', 'https' ); |
| 206 | |
| 207 | /** |
| 208 | * Filter the list of URLs allowed to be clicked and followed in the Customizer preview. |
| 209 | * |
| 210 | * @since 3.4.0 |
| 211 | * |
| 212 | * @param array $allowed_urls An array of allowed URLs. |
| 213 | */ |
| 214 | $allowed_urls = array_unique( apply_filters( 'customize_allowed_urls', $allowed_urls ) ); |
| 215 | |
| 216 | $fallback_url = add_query_arg( array( |
| 217 | 'preview' => 1, |
| 218 | 'template' => $wp_customize->get_template(), |
| 219 | 'stylesheet' => $wp_customize->get_stylesheet(), |
| 220 | 'preview_iframe' => true, |
| 221 | 'TB_iframe' => 'true' |
| 222 | ), home_url( '/' ) ); |
| 223 | |