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PHP如何判断字符串中包含重复的数字

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Jun 13, 2016 am 11:52 AM

dumpmatchnbsp

PHP怎么判断字符串中包含重复的数字？
比如我有这么一组字符串：
a01
a02
a03
a04
.......
a11
a220
a303

其中:a11，a220，a303其中都有重复的两个1，两个2，两个3.
请问怎么用语句判断出来。如字符串里有两个数字是一样的，则为真。否则为假。
------解决方案--------------------

var_dump(preg_match('/(\d).*\1/', 'a303') > 0); //bool(true) <br />var_dump(preg_match('/(\d).*\1/', 'a203') > 0); //bool(false)<br />var_dump(preg_match('/(\d).*\1/', 'a220') > 0); //bool(true)<br />

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