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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 |
---|---|
1064 | * Filter an HTTP status header. |
1065 | * |
1066 | * @since 2.2.0 |
1067 | * |
1068 | * @param string $status_header HTTP status header. |
1069 | * @param int $code HTTP status code. |
1070 | * @param string $description Description for the status code. |
1071 | * @param string $protocol Server protocol. |
1072 | */ |
1073 | $status_header = apply_filters( 'status_header', $status_header, $code, $description, $protocol ); |
1074 |
|
1075 | @header( $status_header, true, $code ); |
1076 | } |
1077 |
|
1078 | /** |
1079 | * Get the header information to prevent caching. |
1080 | * |
1081 | * The several different headers cover the different ways cache prevention |
1082 | * is handled by different browsers |