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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 |
---|---|
1530 | * The echo content should be with usage of the permalinks or for creating the |
1531 | * robot.txt file. |
1532 | * |
1533 | * @since 2.1.0 |
1534 | * @uses do_action() Calls 'do_robotstxt' hook for displaying robot.txt rules. |
1535 | */ |
1536 | function do_robots() { |
1537 | header( 'Content-Type: text/plain; charset=utf-8' ); |
1538 |
|
1539 | do_action( 'do_robotstxt' ); |
1540 |
|
1541 | if ( '0' == get_option( 'blog_public' ) ) { |
1542 | echo "User-agent: *\n"; |
1543 | echo "Disallow: /\n"; |
1544 | } else { |
1545 | echo "User-agent: *\n"; |
1546 | echo "Disallow:\n"; |
1547 | } |
1548 | } |