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如何把4字节数字转为16进制

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Release： 2016-06-13 12:04:18
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怎么把4字节数字转为16进制？
我只知道dechex函数，但转出来是　

<br />echo dechex(1407401322869);<br />
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afa7e975

计算器选四字节出来的结果147afa82c60　才是我要的结果

请问怎么用PHP实现？
------解决方案--------------------
你那是什么计算器？
应该是 147AFA7E975
echo base_convert(1407401322869, 10, 16); //147afa7e975<br />
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