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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 |
|---|---|
| 881 | //Strip out any % encoded octets |
| 882 | $sanitized = preg_replace( '|%[a-fA-F0-9][a-fA-F0-9]|', '', $class ); |
| 883 | |
| 884 | //Limit to A-Z,a-z,0-9,_,- |
| 885 | $sanitized = preg_replace( '/[^A-Za-z0-9_-]/', '', $sanitized ); |
| 886 | |
| 887 | if ( '' == $sanitized ) |
| 888 | $sanitized = $fallback; |
| 889 | |
| 890 | return apply_filters( 'sanitize_html_class', $sanitized, $class, $fallback ); |
| 891 | } |
| 892 | |
| 893 | /** |
| 894 | * Converts a number of characters from a string. |
| 895 | * |
| 896 | * Metadata tags <<title>> and <<category>> are removed, <<br>> and <<hr>> are |
| 897 | * converted into correct XHTML and Unicode characters are converted to the |
| 898 | * valid range. |
| 899 | * |