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foreach引用问题

WBOY
WBOYOriginal
2016-06-06 20:10:16958browse

foreach($arr as $k=>&$v){} 到底是&v=元素值 还是$v=&name(元素值)

回复内容:

foreach($arr as $k=>&$v){} 到底是&v=元素值 还是$v=&name(元素值)

$v就是数组中元素的值,只不过不使用引用是foreach是拷贝元素值到$v里,所以修改$v时不会影响数组里的值,而使用引用时修改能直接体现在数组上。

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