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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 |
|---|---|
| 1037 | //Strip out any % encoded octets |
| 1038 | $sanitized = preg_replace( '|%[a-fA-F0-9][a-fA-F0-9]|', '', $class ); |
| 1039 | |
| 1040 | //Limit to A-Z,a-z,0-9,_,- |
| 1041 | $sanitized = preg_replace( '/[^A-Za-z0-9_-]/', '', $sanitized ); |
| 1042 | |
| 1043 | if ( '' == $sanitized ) |
| 1044 | $sanitized = $fallback; |
| 1045 | |
| 1046 | return apply_filters( 'sanitize_html_class', $sanitized, $class, $fallback ); |
| 1047 | } |
| 1048 | |
| 1049 | /** |
| 1050 | * Converts a number of characters from a string. |
| 1051 | * |
| 1052 | * Metadata tags <<title>> and <<category>> are removed, <<br>> and <<hr>> are |
| 1053 | * converted into correct XHTML and Unicode characters are converted to the |
| 1054 | * valid range. |
| 1055 | * |