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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 |
---|---|
307 | // If strict, reduce to ASCII for max portability. |
308 | if ( $strict ) |
309 | $username = preg_replace('|[^a-z0-9 _.\-@]|i', '', $username); |
310 |
|
311 | return apply_filters('sanitize_user', $username, $raw_username, $strict); |
312 | } |
313 |
|
314 | function sanitize_title($title, $fallback_title = '') { |
315 | $title = strip_tags($title); |
316 | $title = apply_filters('sanitize_title', $title); |
317 |
|
318 | if (empty($title)) { |
319 | $title = $fallback_title; |
320 | } |
321 |
|
322 | return $title; |
323 | } |
324 |
|
325 | function sanitize_title_with_dashes($title) { |