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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 |
---|---|
7958 | * Filters the URL to learn more about updating the PHP version the site is running on. |
7959 | * |
7960 | * Providing an empty string is not allowed and will result in the default URL being used. Furthermore |
7961 | * the page the URL links to should preferably be localized in the site language. |
7962 | * |
7963 | * @since 5.1.0 |
7964 | * |
7965 | * @param string $update_url URL to learn more about updating PHP. |
7966 | */ |
7967 | $update_url = apply_filters( 'wp_update_php_url', $update_url ); |
7968 |
|
7969 | if ( empty( $update_url ) ) { |
7970 | $update_url = $default_url; |
7971 | } |
7972 |
|
7973 | return $update_url; |
7974 | } |
7975 |
|
7976 | /** |