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function b($name, &$value) 里面 $value 前面的& 是干啥的啊？

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2016-06-23 14:19:501155browse

function b($name, &$value)  里面 $value 前面的& 是干啥的啊？


回复讨论(解决方案)

http://www.baidu.com/s?wd=php%D2%FD%D3%C3
PHP 引用

引用传递 

function b($name, &$value) {  $value = $name . $value;}$x = 'abc';$y = 123;b($x, $y);echo $y;//abc123

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