Could someone explain me what is &&

Hi, I know && is Logical Operators in programming language.

But when I go through the The [color="#4169E1"]Definite Guide to Yii [/color], here is a example at

http://www.yiiframework.com/doc/guide/form.table documents.

In the actionBatchUpdate() method, there is a statement says: [color="#4169E1"]$valid=$valid && $item->validate();

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Could anyone tell me what does && means in this case?

I the first operand evaluates to false, no need to evaluate the second operand.

/Tommy

thanks a lot tommy. make sence now