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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 |
|---|---|
| 843 | //Strip out any % encoded octets |
| 844 | $sanitized = preg_replace('|%[a-fA-F0-9][a-fA-F0-9]|', '', $class); |
| 845 | |
| 846 | //Limit to A-Z,a-z,0-9,'-' |
| 847 | $sanitized = preg_replace('/[^A-Za-z0-9-]/', '', $sanitized); |
| 848 | |
| 849 | if ('' == $sanitized) |
| 850 | $sanitized = $fallback; |
| 851 | |
| 852 | return apply_filters('sanitize_html_class',$sanitized, $class, $fallback); |
| 853 | } |
| 854 | |
| 855 | /** |
| 856 | * Converts a number of characters from a string. |
| 857 | * |
| 858 | * Metadata tags <<title>> and <<category>> are removed, <<br>> and <<hr>> are |
| 859 | * converted into correct XHTML and Unicode characters are converted to the |
| 860 | * valid range. |
| 861 | * |