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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 |
|---|---|
| 7443 | * Filters the URL to learn more about updating the PHP version the site is running on. |
| 7444 | * |
| 7445 | * Providing an empty string is not allowed and will result in the default URL being used. Furthermore |
| 7446 | * the page the URL links to should preferably be localized in the site language. |
| 7447 | * |
| 7448 | * @since 5.1.0 |
| 7449 | * |
| 7450 | * @param string $update_url URL to learn more about updating PHP. |
| 7451 | */ |
| 7452 | $update_url = apply_filters( 'wp_update_php_url', $update_url ); |
| 7453 | |
| 7454 | if ( empty( $update_url ) ) { |
| 7455 | $update_url = $default_url; |
| 7456 | } |
| 7457 | |
| 7458 | return $update_url; |
| 7459 | } |
| 7460 | |
| 7461 | /** |