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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 |
---|---|
848 |
|
849 | if ( empty( $text ) ) |
850 | return false; |
851 |
|
852 | $protocol = $_SERVER["SERVER_PROTOCOL"]; |
853 | if ( 'HTTP/1.1' != $protocol && 'HTTP/1.0' != $protocol ) |
854 | $protocol = 'HTTP/1.0'; |
855 | $status_header = "$protocol $header $text"; |
856 | if ( function_exists( 'apply_filters' ) ) |
857 | $status_header = apply_filters( 'status_header', $status_header, $header, $text, $protocol ); |
858 |
|
859 | if ( version_compare( phpversion(), '4.3.0', '>=' ) ) |
860 | return @header( $status_header, true, $header ); |
861 | else |
862 | return @header( $status_header ); |
863 | } |
864 |
|
865 |
|
866 | function nocache_headers() { |