1.如果不加命名空间
test1.php
<code><span><span>function</span><span>test</span><span>()</span>
{</span><span>echo</span><span>'test1'</span>;
}</code>test2.php
<code><span><span>function</span><span>test</span><span>()</span>
{</span><span>echo</span><span>'test2'</span>;
}</code>test.php
<code><span>require</span><span>'test1.php'</span>; <span>require</span><span>'test2.php'</span>;</code>
报错： 
2.加了命名空间
test1.php
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<code><span>namespace</span><span>Test1</span>;
<span><span>function</span><span>test</span><span>()</span>
{</span><span>echo</span><span>'test1'</span>;
}</code>test2.php
<code><span>namespace</span><span>Test2</span>;
<span><span>function</span><span>test</span><span>()</span>
{</span><span>echo</span><span>'test2'</span>;
}</code>test.php
<code><span>require</span><span>'test1.php'</span>; <span>require</span><span>'test2.php'</span>; Test1\test(); <span>echo</span><span>'<br/>*************<br/>'</span>; Test2\test();</code>
以上就介绍了90 php 命名空间，包括了方面的内容，希望对PHP教程有兴趣的朋友有所帮助。
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