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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 |
---|---|
315 | // If strict, reduce to ASCII for max portability. |
316 | if ( $strict ) |
317 | $username = preg_replace('|[^a-z0-9 _.\-@]|i', '', $username); |
318 |
|
319 | return apply_filters('sanitize_user', $username, $raw_username, $strict); |
320 | } |
321 |
|
322 | function sanitize_title($title, $fallback_title = '') { |
323 | $title = strip_tags($title); |
324 | $title = apply_filters('sanitize_title', $title); |
325 |
|
326 | if (empty($title)) { |
327 | $title = $fallback_title; |
328 | } |
329 |
|
330 | return $title; |
331 | } |
332 |
|
333 | function sanitize_title_with_dashes($title) { |