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Source View: pre_set_transient_{$transient}

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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
752  *
753  * @param string $transient Transient name. Expected to not be SQL-escaped.
754  * @param mixed $value Transient value. Expected to not be SQL-escaped.
755  * @param int $expiration Time until expiration in seconds, default 0
756  * @return bool False if value was not set and true if value was set.
757  */
758 function set_transient( $transient, $value, $expiration = 0 ) {
759      global $_wp_using_ext_object_cache;
760
761     $value = apply_filters( 'pre_set_transient_' . $transient, $value );
762
763      if ( $_wp_using_ext_object_cache ) {
764           $result = wp_cache_set( $transient, $value, 'transient', $expiration );
765      } else {
766           $transient_timeout = '_transient_timeout_' . $transient;
767           $transient = '_transient_' . $transient;
768           if ( false === get_option( $transient ) ) {
769                $autoload = 'yes';
770                if ( $expiration ) {