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PHP的substr函数怎么完全模拟ASP的right函数

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Release： 2016-06-13 12:46:40
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PHP的substr函数如何完全模拟ASP的right函数
有人说substr能完全取代ASP的right函数
//right （x）
substr($str,-x); 

但如果x=0时，就完全不能取代了，有什么办法可以当x=0时，也用substr取代吗

Related labels：
asp function nbsp right substr
source：php.cn
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