Commit b4925d78 by Carsten Brandt

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.
parent b869f4e7
...@@ -14,13 +14,18 @@ namespace yii\caching; ...@@ -14,13 +14,18 @@ namespace yii\caching;
* The dependency is reported as unchanged if and only if the result of the expression is * 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. * 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> * @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0 * @since 2.0
*/ */
class ExpressionDependency extends Dependency 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; public $expression;
......
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