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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 |
|---|---|
| 206 | $title = strip_tags($posts[0]->post_title); |
| 207 | $title = apply_filters('single_post_title', $title); |
| 208 | } |
| 209 | |
| 210 | $prefix = ''; |
| 211 | if ( !empty($title) ) |
| 212 | $prefix = " $sep "; |
| 213 | |
| 214 | $title = $prefix . $title; |
| 215 | $title = apply_filters('wp_title', $title, $sep); |
| 216 | |
| 217 | // Send it out |
| 218 | if ( $display ) |
| 219 | echo $title; |
| 220 | else |
| 221 | return $title; |
| 222 | } |
| 223 | |
| 224 | |