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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 |
|---|---|
| 1197 | |
| 1198 | if ( empty( $text ) ) |
| 1199 | return false; |
| 1200 | |
| 1201 | $protocol = $_SERVER["SERVER_PROTOCOL"]; |
| 1202 | if ( 'HTTP/1.1' != $protocol && 'HTTP/1.0' != $protocol ) |
| 1203 | $protocol = 'HTTP/1.0'; |
| 1204 | $status_header = "$protocol $header $text"; |
| 1205 | if ( function_exists( 'apply_filters' ) ) |
| 1206 | $status_header = apply_filters( 'status_header', $status_header, $header, $text, $protocol ); |
| 1207 | |
| 1208 | if ( version_compare( phpversion(), '4.3.0', '>=' ) ) |
| 1209 | return @header( $status_header, true, $header ); |
| 1210 | else |
| 1211 | return @header( $status_header ); |
| 1212 | } |
| 1213 | |
| 1214 | /** |
| 1215 | * Sets the headers to prevent caching for the different browsers. |