From b4925d78db28fdf9b51b2e75fe4dc6d9a01191ab Mon Sep 17 00:00:00 2001
From: Carsten Brandt <mail@cebe.cc>
Date: Wed, 1 May 2013 23:48:33 +0200
Subject: [PATCH] better documentation for php expressions
related to issue yiisoft/yii#1921
Explain what a php expression is an refer to the php manual for more
details.
---
framework/caching/ExpressionDependency.php | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/framework/caching/ExpressionDependency.php b/framework/caching/ExpressionDependency.php
index e13c962..303ccdc 100644
--- a/framework/caching/ExpressionDependency.php
+++ b/framework/caching/ExpressionDependency.php
@@ -14,13 +14,18 @@ namespace yii\caching;
* The dependency is reported as unchanged if and only if the result of the expression is
* the same as the one evaluated when storing the data to cache.
*
+ * A PHP expression can be any PHP code that has a value. To learn more about what an expression is,
+ * please refer to the [php manual](http://www.php.net/manual/en/language.expressions.php).
+ *
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class ExpressionDependency extends Dependency
{
/**
- * @var string the PHP expression whose result is used to determine the dependency.
+ * @var string the string representation of a PHP expression whose result is used to determine the dependency.
+ * A PHP expression can be any PHP code that has a value. To learn more about what an expression is,
+ * please refer to the [php manual](http://www.php.net/manual/en/language.expressions.php).
*/
public $expression;
--
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