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Cache API: introduce wp_cache_get_last_changed to improve DRY

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One thing fairly common to the cache groups is a block of code to look to see when the cache was last changed, and if there isn't one, to set it for the current microtime(). It appears in 8 different places in core. This adds a new helper `wp_cache_get_last_changed` to DRY things up a bit.

Since `wp-includes/cache.php` isn't guaranteed to be loaded, this new function is in `wp-includes/functions.php`

Props spacedmonkey, desrosj.
Fixes #37464.



git-svn-id: https://develop.svn.wordpress.org/trunk@38849 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Aaron Jorbin
2016-10-21 02:53:19 +00:00
parent ce21d8210a
commit a8aa7b0ca2
7 changed files with 29 additions and 40 deletions
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20
src/wp-includes/functions.php
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@@ -5553,3 +5553,23 @@ function wp_generate_uuid4() {
mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff )
);
}
/**
* Get last changed date for the specified cache group.
*
* @since 4.7.0
*
* @param $group Where the cache contents are grouped.
*
* @return string $last_changed UNIX timestamp with microseconds representing when the group was last changed.
*/
function wp_cache_get_last_changed( $group ) {
$last_changed = wp_cache_get( 'last_changed', $group );
if ( ! $last_changed ) {
$last_changed = microtime();
wp_cache_set( 'last_changed', $last_changed, $group );
}
return $last_changed;
}