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php- PHP的一个坑-----自增运算符

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2016-06-02 11:34:42929browse

php

$a=1;
echo $a+$a++; //3

$a = 1;
echo $a + $a + $a++; //3

输出都是3,为什么不先算$a++,玩了之后再和前面的$a相加,这样的话不是就是5了么

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