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PHP echo十六进制数值

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Release： 2016-06-23 14:10:38
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<?phpecho 0x9f;?>
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运行程序输出159。
159的16进制是9f,为什么前面要加0x呢？
还有这里为什么可以直接输出一个16进制数值而不是报错呢？


回复讨论(解决方案)

所有的从 C 派生的源都是这么表示的，如果非要究个为什么，那就要去问贝尔电话实验室了

十六进制（Hex number system）不取 H （不过basic 是取 H 的）反而要取 x ，可见老外也不是很守“规矩”的

这是c的错，让你不解，就接受吧

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