php判断一个数组是否为有序的方法
这篇文章主要介绍了php判断一个数组是否为有序的方法,涉及php操作数组遍历的相关技巧,非常具有实用价值,需要的朋友可以参考下
本文实例讲述了php判断一个数组是否为有序的方法。分享给大家供大家参考。具体分析如下:
这段代码的时间复杂度为O(n)
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function JudegSortArray($array) { if ($array [0] > $array [1]) { $flag = 1; } else { $flag = 0; } $temp = $flag; $len = count ( $array ); for($i = 1; $i if ($flag == 0) { if ($array [$i] { continue; } else { $flag = 1; break; } } if ($flag == 1) { if ($array [$i] > $array [$i + 1]) { continue; } else { $flag = 0; break; } } } if ($flag != $temp) { echo "无序数组"; } else { echo "有序数组"; } } // 测试用例 $array = array ( 1, 2, 3, 4, 6, 5 ); $ret = JudegSortArray ( $array ); echo $ret; |
希望本文所述对大家的php程序设计有所帮助。

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