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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 |
|---|---|
| 1380 | |
| 1381 | if ( empty( $text ) ) |
| 1382 | return false; |
| 1383 | |
| 1384 | $protocol = $_SERVER["SERVER_PROTOCOL"]; |
| 1385 | if ( 'HTTP/1.1' != $protocol && 'HTTP/1.0' != $protocol ) |
| 1386 | $protocol = 'HTTP/1.0'; |
| 1387 | $status_header = "$protocol $header $text"; |
| 1388 | if ( function_exists( 'apply_filters' ) ) |
| 1389 | $status_header = apply_filters( 'status_header', $status_header, $header, $text, $protocol ); |
| 1390 | |
| 1391 | if ( version_compare( phpversion(), '4.3.0', '>=' ) ) |
| 1392 | return @header( $status_header, true, $header ); |
| 1393 | else |
| 1394 | return @header( $status_header ); |
| 1395 | } |
| 1396 | |
| 1397 | /** |
| 1398 | * Sets the headers to prevent caching for the different browsers. |