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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 |
|---|---|
| 2131 | * @param string $scheme The scheme to use. Default is 'admin', which obeys force_ssl_admin() and is_ssl(). 'http' or 'https' can be passed to force those schemes. |
| 2132 | * @return string Admin url link with optional path appended |
| 2133 | */ |
| 2134 | function network_admin_url( $path = '', $scheme = 'admin' ) { |
| 2135 | $url = network_site_url('wp-admin/', $scheme); |
| 2136 | |
| 2137 | if ( !empty($path) && is_string($path) && strpos($path, '..') === false ) |
| 2138 | $url .= ltrim($path, '/'); |
| 2139 | |
| 2140 | return apply_filters('network_admin_url', $url, $path); |
| 2141 | } |
| 2142 | |
| 2143 | /** |
| 2144 | * Output rel=canonical for singular queries |
| 2145 | * |
| 2146 | * @package WordPress |
| 2147 | * @since 2.9.0 |
| 2148 | */ |
| 2149 | function rel_canonical() { |