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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 |
---|---|
1836 | * The echo content should be with usage of the permalinks or for creating the |
1837 | * robot.txt file. |
1838 | * |
1839 | * @since 2.1.0 |
1840 | * @uses do_action() Calls 'do_robotstxt' hook for displaying robot.txt rules. |
1841 | */ |
1842 | function do_robots() { |
1843 | header( 'Content-Type: text/plain; charset=utf-8' ); |
1844 |
|
1845 | do_action( 'do_robotstxt' ); |
1846 |
|
1847 | $output = ''; |
1848 | $public = get_option( 'blog_public' ); |
1849 | if ( '0' == $public ) { |
1850 | $output .= "User-agent: *\n"; |
1851 | $output .= "Disallow: /\n"; |
1852 | } else { |
1853 | $output .= "User-agent: *\n"; |
1854 | $output .= "Disallow:\n"; |