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php运算符-11月12号作业
wenbin0209
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688 people have browsed it

手写：

image.png

image.png


&&：and  与

 必须两边的值都为true,否则返回false,有断路效果

||：or  或

有一边的值符合返回true即可

empty:  0 也属于有值，会判断为不是空

Correcting teacher：天蓬老师天蓬老师

Correction status：qualified

Teacher's comments：你这作业, 差的不只一点了, 尽快赶上来
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