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HomeBackend DevelopmentPHP Tutorialphp 统计二维数组中某个相等值的总个数,并且组合成一个新的数组

php  多维数组 


比如这样的,我想将这个数组里面 m_id 相等数组元素再组合成一个新的数组:效果图如下:



回复讨论(解决方案)

举例时要自圆其说,不然会产生误解

原始数据中并没有:
'sv_id' => 5, 'mid' => 0
'sv_id' => 9, 'mid' => 3
的项,结果中是如何出来的?

举例时要自圆其说,不然会产生误解

原始数据中并没有:
'sv_id' => 5, 'mid' => 0
'sv_id' => 9, 'mid' => 3
的项,结果中是如何出来的?

额,是的,不过数据是可以随便改的啊,好好看看两张图的数组结构吧。。。

这根结构没什么关系吧?
从算法角度上看:是如何产生不在原始数据中的项

<?php $arr=array(		array(				'sv_id'=>1,				'm_id'=>1,				'sv_question1'=>20				),			array(				'sv_id'=>2,				'm_id'=>2,				'sv_question1'=>10		),		array(				'sv_id'=>3,				'm_id'=>1,				'sv_question1'=>20		),		array(				'sv_id'=>4,				'm_id'=>3,				'sv_question1'=>20		),		array(				'sv_id'=>5,				'm_id'=>2,				'sv_question1'=>10		)	);//var_dump($arr);$ar=array();foreach($arr as $v){		if(empty($ar) || !in_array($v,$ar)){			$ar[$v['m_id']][$v['sv_id']]=$v;		}else{			foreach($ar as $ka=>$va){				if($ka==$v['m_id']){					$ar[$ka][$v['sv_id']]=$v;				}			}		}}echo "<pre class="brush:php;toolbar:false">";var_dump($ar);

你复制运行一下看是不是你要的效果。
效果图:



不考虑你多出的项目(我无法臆造)

$ar = array(  array( 'sv_id' => 1, 'mid' => 1, 'sv_question1' => 20 ),  array( 'sv_id' => 2, 'mid' => 2, 'sv_question1' => 10 ),  array( 'sv_id' => 3, 'mid' => 1, 'sv_question1' => 20 ),  array( 'sv_id' => 4, 'mid' => 3, 'sv_question1' => 20 ),  array( 'sv_id' => 5, 'mid' => 2, 'sv_question1' => 20 ),);$res = array();foreach($ar as $item) {  $res[$item['mid']][$item['sv_id']] = $item;}print_r($res);
Array(    [1] => Array        (            [1] => Array                (                    [sv_id] => 1                    [mid] => 1                    [sv_question1] => 20                )            [3] => Array                (                    [sv_id] => 3                    [mid] => 1                    [sv_question1] => 20                )        )    [2] => Array        (            [2] => Array                (                    [sv_id] => 2                    [mid] => 2                    [sv_question1] => 10                )            [5] => Array                (                    [sv_id] => 5                    [mid] => 2                    [sv_question1] => 20                )        )    [3] => Array        (            [4] => Array                (                    [sv_id] => 4                    [mid] => 3                    [sv_question1] => 20                )        ))

哇,#5版主,,,为啥我想不到你写的方法呢。。你的好简洁。

<?php $arr=array(		array(				'sv_id'=>1,				'm_id'=>1,				'sv_question1'=>20				),			array(				'sv_id'=>2,				'm_id'=>2,				'sv_question1'=>10		),		array(				'sv_id'=>3,				'm_id'=>1,				'sv_question1'=>20		),		array(				'sv_id'=>4,				'm_id'=>3,				'sv_question1'=>20		),		array(				'sv_id'=>5,				'm_id'=>2,				'sv_question1'=>10		)	);//var_dump($arr);$ar=array();foreach($arr as $v){		if(empty($ar) || !in_array($v,$ar)){			$ar[$v['m_id']][$v['sv_id']]=$v;		}else{			foreach($ar as $ka=>$va){				if($ka==$v['m_id']){					$ar[$ka][$v['sv_id']]=$v;				}			}		}}echo "<pre class="brush:php;toolbar:false">";var_dump($ar);

你复制运行一下看是不是你要的效果。
效果图:



嗯,这个办法可以,谢啦, 不过下面的大神更恐怖,太简单了!!!

不考虑你多出的项目(我无法臆造)

$ar = array(  array( 'sv_id' => 1, 'mid' => 1, 'sv_question1' => 20 ),  array( 'sv_id' => 2, 'mid' => 2, 'sv_question1' => 10 ),  array( 'sv_id' => 3, 'mid' => 1, 'sv_question1' => 20 ),  array( 'sv_id' => 4, 'mid' => 3, 'sv_question1' => 20 ),  array( 'sv_id' => 5, 'mid' => 2, 'sv_question1' => 20 ),);$res = array();foreach($ar as $item) {  $res[$item['mid']][$item['sv_id']] = $item;}print_r($res);
Array(    [1] => Array        (            [1] => Array                (                    [sv_id] => 1                    [mid] => 1                    [sv_question1] => 20                )            [3] => Array                (                    [sv_id] => 3                    [mid] => 1                    [sv_question1] => 20                )        )    [2] => Array        (            [2] => Array                (                    [sv_id] => 2                    [mid] => 2                    [sv_question1] => 10                )            [5] => Array                (                    [sv_id] => 5                    [mid] => 2                    [sv_question1] => 20                )        )    [3] => Array        (            [4] => Array                (                    [sv_id] => 4                    [mid] => 3                    [sv_question1] => 20                )        ))



太牛了!!!膜拜   谢谢!!

这根结构没什么关系吧?
从算法角度上看:是如何产生不在原始数据中的项

额,是,sorry 我写错,少了一个下划线 m_id 写成了mid


<?php $arr=array(		array(				'sv_id'=>1,				'm_id'=>1,				'sv_question1'=>20				),			array(				'sv_id'=>2,				'm_id'=>2,				'sv_question1'=>10		),		array(				'sv_id'=>3,				'm_id'=>1,				'sv_question1'=>20		),		array(				'sv_id'=>4,				'm_id'=>3,				'sv_question1'=>20		),		array(				'sv_id'=>5,				'm_id'=>2,				'sv_question1'=>10		)	);//var_dump($arr);$ar=array();foreach($arr as $v){		if(empty($ar) || !in_array($v,$ar)){			$ar[$v['m_id']][$v['sv_id']]=$v;		}else{			foreach($ar as $ka=>$va){				if($ka==$v['m_id']){					$ar[$ka][$v['sv_id']]=$v;				}			}		}}echo "<pre class="brush:php;toolbar:false">";var_dump($ar);

你复制运行一下看是不是你要的效果。
效果图:



嗯,这个办法可以,谢啦, 不过下面的大神更恐怖,太简单了!!!



<?php $arr=array(		array(				'sv_id'=>1,				'm_id'=>1,				'sv_question1'=>20				),			array(				'sv_id'=>2,				'm_id'=>2,				'sv_question1'=>10		),		array(				'sv_id'=>3,				'm_id'=>1,				'sv_question1'=>20		),		array(				'sv_id'=>4,				'm_id'=>3,				'sv_question1'=>20		),		array(				'sv_id'=>5,				'm_id'=>2,				'sv_question1'=>10		)	);//var_dump($arr);$ar=array();foreach($arr as $v){		if(empty($ar) || !in_array($v,$ar)){			$ar[$v['m_id']][$v['sv_id']]=$v;		}else{			foreach($ar as $ka=>$va){				if($ka==$v['m_id']){					$ar[$ka][$v['sv_id']]=$v;				}			}		}}echo "<pre class="brush:php;toolbar:false">";var_dump($ar);

你复制运行一下看是不是你要的效果。
效果图:



嗯,这个办法可以,谢啦, 不过下面的大神更恐怖,太简单了!!!

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