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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 |
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7 |
|
8 | require( './wp-blog-header.php' ); |
9 |
|
10 | if ( is_array( get_site_option( 'illegal_names' )) && isset( $_GET[ 'new' ] ) && in_array( $_GET[ 'new' ], get_site_option( 'illegal_names' ) ) == true ) { |
11 | wp_redirect( network_home_url() ); |
12 | die(); |
13 | } |
14 |
|
15 | function do_signup_header() { |
16 | do_action( 'signup_header' ); |
17 | } |
18 | add_action( 'wp_head', 'do_signup_header' ); |
19 |
|
20 | if ( !is_multisite() ) { |
21 | wp_redirect( site_url('wp-login.php?action=register') ); |
22 | die(); |
23 | } |
24 |
|
25 | if ( !is_main_site() ) { |