Use pass-by-reference only if you have to.
必要时才使用引用变量参数传递。
In Listing 6, the connector can either pass the result inline or by reference.
在清单6中，连接器可以以内联或引用的方式传递结果。
PHP 4 added the ability to pass and return by reference.
PHP4添加了基于引用的传递和返回功能。
In Listing 6, the connector can either pass the result inline or by reference.
在清单6薸中，连接器可以以内联或引用的方式传递结果。
How to pass parameter by reference to the proc?
如何通过引用传递参数的过程？
Why does this method pass 'stop' by reference instead of return?
为什么这个方法通过“停止”而返回参考？
Why does this method pass 'stop' by reference instead of return?
为什么这个方法通过“停止”而返回参考？
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