Source View: sanitize_key

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Understanding Source Code

The best way to understand what a hook does is to look at where it occurs in the source code.

  • Action hooks look like this: do_action( "hook_name" )
  • Filter hooks look like this: 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.

Source View

Line Code
776  * @since 3.0.0
777  *
778  * @param string $key String key
779  * @return string Sanitized key
780  */
781 function sanitize_key( $key ) {
782      $raw_key = $key;
783      $key = strtolower( $key );
784      $key = preg_replace( '/[^a-z0-9_\-]/', '', $key );
785      return apply_filters( 'sanitize_key', $key, $raw_key );
786 }
787
788 /**
789  * Sanitizes title or use fallback title.
790  *
791  * Specifically, HTML and PHP tags are stripped. Further actions can be added
792  * via the plugin API. If $title is empty and $fallback_title is set, the latter
793  * will be used.
794  *