如何在php中对具有相同索引的数组元素进行分组
我有以下数组和如何在php中对具有相同索引的数组元素进行分组,php,arrays,Php,Arrays,我有以下数组和 Array ( [0] => Array ( [70] => Array ( [0] => d ) ) [1] => Array ( [71] => Array ( [0] => a ) ) [2] => Array ( [71] => Array ( [0] => c ) ) [3] => Array ( [71] => Array ( [0] => d ) )
Array (
[0] => Array ( [70] => Array ( [0] => d ) )
[1] => Array ( [71] => Array ( [0] => a ) )
[2] => Array ( [71] => Array ( [0] => c ) )
[3] => Array ( [71] => Array ( [0] => d ) )
[4] => Array ( [72] => Array ( [0] => b ) )
[5] => Array ( [73] => Array ( [0] => a ) )
[6] => Array ( [73] => Array ( [0] => c ) )
[7] => Array ( [74] => Array ( [0] => a ) )
[8] => Array ( [75] => Array ( [0] => a ) )
)
我想使上面的数组如下所示
Array (
[70] => Array ( [0] => c )
[71] => Array ( [1] => b [2] => c )
[72] => Array ( [2] => c )
[73] => Array ( [0] => a [2] => c )
[74] => Array ( [4] => c )
[75] => Array ( [5] => c )
)
请帮助我如何在php中实现这一点?不清楚这两个数组之间有什么关系。你能详细说明和/或验证这些数组是否是你想要的吗?嗨,我正在构建一个在线测验应用程序,第一个数组表示71,72的问题id。。正确答案70=>d(只有一个答案),71=>a,c,d,(71有3个正确答案,是多个答案),这是从数据库中检索到的,第二个数组是候选答案,它也有问题id 71,72,。。和相对答案,我想比较两个数组,并想显示用户如果选择了错误的选项,正确答案是什么,或者请告诉我当测验完成时显示的好方法候选人必须知道他们的结果和正确答案,你是如何得出
[70]=>数组的([0]=>c
作为答案?您的示例具有[70]=>Array([0]=>d
我已从数据库表中检索,并将其存储为数组。您不能有重复的键!