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54 lines
1.1 KiB
54 lines
1.1 KiB
<?php
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//命名空间a
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namespace a
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{
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const const_a=1; //常量a
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function func_a()
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{
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echo __FUNCTION__.'<br>';
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}
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class cls_a
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{
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static function func()
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{
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echo __CLASS__.'--'.__FUNCTION__.'<br>';
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}
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}
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}
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//命名空间b
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namespace b
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{
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//导入类
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use a\cls_a as cls_b; //导入命名空间a\b\c的类cls_a，设置别名cls_a
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$obj=new cls_b;
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$obj -> func();
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//导入函数
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use function a\func_a;
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func_a();
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//导入常量
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use const a\const_a;
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echo const_a.'<br>';
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}
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namespace c
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{
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//导入命名空间
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use a as aa;
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echo aa\const_a.'<br>';;
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aa\func_a();
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$obj=new aa\cls_a();
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$obj -> func();
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}
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//感悟：命名空间就像在一个文件中把其中一筐代码框住，放在一个空间中，当要使用是就用use导入
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//注意：导入不同文件的命名空间需要用iclude'file'
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?>
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