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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 |
|---|---|
| 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"; |
| 1855 | } |
| 1856 | |
| 1857 | echo apply_filters('robots_txt', $output, $public); |
| 1858 | } |
| 1859 | |
| 1860 | /** |
| 1861 | * Test whether blog is already installed. |
| 1862 | * |
| 1863 | * The cache will be checked first. If you have a cache plugin, which saves the |
| 1864 | * cache values, then this will work. If you use the default WordPress cache, |
| 1865 | * and the database goes away, then you might have problems. |
| 1866 | * |