看看有没有更好的法子
刚在技术群看到一条N个钟前的问题:
用PHP如何找出在一个字符串中出现最多的字符
我的思路是先将字符串侵害成数组,通过array_count_values得到元素个数统计,排序,取最顶那个为最多次数,然后可能有多个相同最多次数,for循环找出来..
$testStr = 'rewruo ewjrewm' . PHP_EOL . 'hcywer国bg gfaaf d中国国国s国rew';$testStr = preg_replace('/\s/', '', $testStr);preg_match_all('/./u', $testStr, $strList);$charCount = array_count_values($strList[0]);arsort($charCount);$maxCount = current($charCount);foreach($charCount as $char => $count){ if($count < $maxCount){ break; } echo $char . '出现了 ' . $count . ' 次<br />';}
回复讨论(解决方案)
既然都用 array_count_values ,用 max 求交集就是了,不必循环
你都arsort了,直接echo key($charCount); 就是出现最多的字符了。
既然都用 array_count_values ,用 max 求交集就是了,不必循环
你都arsort了,直接echo key($charCount); 就是出现最多的字符了。
我循环是为了将其他同属最多次数的字符也输出来..按照你们的做法只输出了其中一个而已呢
既然都用 array_count_values ,用 max 求交集就是了,不必循环
你都arsort了,直接echo key($charCount); 就是出现最多的字符了。
我循环是为了将其他同属最多次数的字符也输出来..按照你们的做法只输出了其中一个而已呢
你没试过吧?交集啊,array_intersect,先去试一下看看结果~
你没试过吧?交集啊,array_intersect,先去试一下看看结果~
求代码,我的代码求出结果如下:
r出现了 5 次
w出现了 5 次
国出现了 5 次
e出现了 5 次
因为有4个相同次数并且是最多次数的字符
已经没有都少简化的余地了
$testStr = 'rewruo ewjrewm' . PHP_EOL . 'hcywer国bg gfaaf d中国国国s国rew';$testStr = preg_replace('/\s/', '', $testStr);preg_match_all('/./u', $testStr, $strList);$strList = array_count_values($strList[0]);$r = array_keys($strList, $m = max($strList));echo join($t=" 出现了 $m 次<br />", $r).$t;
e 出现了 5 次
w 出现了 5 次
国 出现了 5 次

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