关联参数传递的使用方法

1、方法一：functionfoo(&$bar){$bar.="andsomethingextra";}$str="ThisisaString,";foo($str);echo$str;//output:ThisisaString,andsomethingextra echo"＜br＞";

2、方法二：functionfoo1($bar){$bar.="andsomethingextra";}$str="ThisisaString,";foo1($str);echo$str;//output:ThisisaString,echo"＜br＞";foo1(&$str);echo$str;//output:ThisisaString,andsomethingextra?＞