From b054b952bc853362c49c7a61e4f75b1511eb3a7b Mon Sep 17 00:00:00 2001
From: Scott Taylor <wonderboymusic@git.wordpress.org>
Date: Tue, 6 Oct 2015 14:10:00 +0000
Subject: [PATCH] Transients, add filters for `$expiration`: *
 `'expiration_pre_set_site_transient_' . $transient` *
 `'expiration_pre_set_transient_' . $transient`

Props chriscct7, wpsmith, nacin.
Fixes #21330.


git-svn-id: https://develop.svn.wordpress.org/trunk@34865 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-includes/option.php | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/src/wp-includes/option.php b/src/wp-includes/option.php
index 701e485cf9..4ee24fdf4b 100644
--- a/src/wp-includes/option.php
+++ b/src/wp-includes/option.php
@@ -695,6 +695,19 @@ function set_transient( $transient, $value, $expiration = 0 ) {
 	 */
 	$value = apply_filters( 'pre_set_transient_' . $transient, $value, $expiration, $transient );
 
+	/**
+	 * Filter the expiration for a transient before its value is set.
+	 *
+	 * The dynamic portion of the hook name, `$transient`, refers to the transient name.
+	 *
+	 * @since 4.4.0
+	 *
+	 * @param mixed  $value      New value of transient.
+	 * @param int    $expiration Time until expiration in seconds.
+	 * @param string $transient  Transient name.
+	 */
+	$expiration = apply_filters( 'expiration_pre_set_transient_' . $transient, $expiration, $value, $transient );
+
 	if ( wp_using_ext_object_cache() ) {
 		$result = wp_cache_set( $transient, $value, 'transient', $expiration );
 	} else {
@@ -1589,6 +1602,19 @@ function set_site_transient( $transient, $value, $expiration = 0 ) {
 
 	$expiration = (int) $expiration;
 
+	/**
+	 * Filter the expiration for a transient before its value is set.
+	 *
+	 * The dynamic portion of the hook name, `$transient`, refers to the transient name.
+	 *
+	 * @since 4.4.0
+	 *
+	 * @param mixed  $value      New value of transient.
+	 * @param int    $expiration Time until expiration in seconds.
+	 * @param string $transient  Transient name.
+	 */
+	$expiration = apply_filters( 'expiration_pre_set_site_transient_' . $transient, $expiration, $value, $transient );	
+
 	if ( wp_using_ext_object_cache() ) {
 		$result = wp_cache_set( $transient, $value, 'site-transient', $expiration );
 	} else {