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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 |
---|---|
930 | //Strip out any % encoded octets |
931 | $sanitized = preg_replace( '|%[a-fA-F0-9][a-fA-F0-9]|', '', $class ); |
932 |
|
933 | //Limit to A-Z,a-z,0-9,_,- |
934 | $sanitized = preg_replace( '/[^A-Za-z0-9_-]/', '', $sanitized ); |
935 |
|
936 | if ( '' == $sanitized ) |
937 | $sanitized = $fallback; |
938 |
|
939 | return apply_filters( 'sanitize_html_class', $sanitized, $class, $fallback ); |
940 | } |
941 |
|
942 | /** |
943 | * Converts a number of characters from a string. |
944 | * |
945 | * Metadata tags <<title>> and <<category>> are removed, <<br>> and <<hr>> are |
946 | * converted into correct XHTML and Unicode characters are converted to the |
947 | * valid range. |
948 | * |