pre_transient_<transient>

Filters the value of an existing transient.

Description

apply_filters( 'pre_transient_<transient>', (bool) $false, (string) $transient ); 

The dynamic portion(s) of the hook name refer to the transient name.

Passing a truthy value to the filter will effectively short-circuit retrieval of the transient, returning the passed value instead.

Parameters (2)

0. $false (bool) => false
The default value to return if the transient does not exist. Any value other than false will short-circuit the retrieval of the transient, and return the returned value.
1. $transient (string)
Transient name.

Usage

To run the hook, copy the example below.
  1. $false = apply_filters( 'pre_transient_{$transient}', $false, $transient ); 
  2.  
  3. if ( !empty( $false ) ) { 
  4.  
  5. // everything has led up to this point... 
  6.  
  7.  
The following example is for adding a hook callback.
  1. // define the pre_transient_<transient> callback 
  2. function filter_pre_transient_transient( $false, $transient ) { 
  3. // make filter magic happen here... 
  4. return $false
  5. }; 
  6.  
  7. // add the filter 
  8. add_filter( "pre_transient_{$transient}", 'filter_pre_transient_transient', 10, 2 ); 
To remove a hook callback, use the example below.
  1. // remove the filter 
  2. remove_filter( "pre_transient_{$transient}", 'filter_pre_transient_transient', 10, 2 ); 

Defined (1)

The filter is defined in the following location(s).

/wp-includes/option.php  
  1. $pre = apply_filters( "pre_transient_{$transient}", false, $transient );