数组的PHP排序元素

我正在使用这种排序来按我需要的方式排列$arr中的数据

它工作得很好，但是，当有超过16个数组时，它似乎丢失了最后一个数组

我认为问题在于数据，但我还没有找到问题的根源

我在使用此阵列时：

array ( 
0 => array ( 'race_order' => 1, 'heat_nbr' => 4, 'racer_id' => 620, 'heat_finish' => 4, 'race_time' => '120.00', ), 
1 => array ( 'race_order' => 1, 'heat_nbr' => 4, 'racer_id' => 645, 'heat_finish' => 5, 'race_time' => '120.00', ), 
2 => array ( 'race_order' => 1, 'heat_nbr' => 4, 'racer_id'=> 487, 'heat_finish' => 6, 'race_time' => '120.00', ), 
3 => array ( 'race_order' => 2, 'heat_nbr' => 3, 'racer_id' => 857, 'heat_finish' => 4, 'race_time' => '160.00', ), 
4 => array ( 'race_order' => 2, 'heat_nbr' => 3, 'racer_id'=> 1191, 'heat_finish' => 5, 'race_time' => '160.00', ), 
5 => array ( 'race_order' => 2, 'heat_nbr' => 3, 'racer_id' => 1269, 'heat_finish' => 6, 'race_time' =>'160.00', ), 
6 => array ( 'race_order' => 2, 'heat_nbr' => 3, 'racer_id'=> 723, 'heat_finish' => 7, 'race_time' => '160.00', ), 
7 => array ( 'race_order' => 3, 'heat_nbr' => 2, 'racer_id' => 245, 'heat_finish' => 3, 'race_time' =>'180.0000', ), 
8 => array ( 'race_order' => 3, 'heat_nbr' => 2, 'racer_id'=> 65, 'heat_finish' => 4, 'race_time' => '180.0000', ), 
9 => array ( 'race_order' => 3, 'heat_nbr' => 2, 'racer_id' => 269, 'heat_finish' => 5, 'race_time' =>'180.0000', ), 
10 => array ( 'race_order' => 3, 'heat_nbr' => 2,'racer_id' => 860, 'heat_finish' => 6, 'race_time' => '180.0000', ), 
11 => array ('race_order' => 3, 'heat_nbr' => 2, 'racer_id' => 226, 'heat_finish' => 7,'race_time' => '180.0000', ), 
12 => array ( 'race_order' => 4, 'heat_nbr'=> 1, 'racer_id' => 24, 'heat_finish' => 3, 'race_time' => '240.00', ),
13 => array ('race_order' => 4, 'heat_nbr' => 1, 'racer_id' => 1006, 'heat_finish' =>4, 'race_time' => '240.00', ), 
14 => array ( 'race_order' => 4, 'heat_nbr'=> 1, 'racer_id' => 625, 'heat_finish' => 5, 'race_time' => '240.00', ), 
15 => array ('race_order' => 4, 'heat_nbr' => 1, 'racer_id' => 1115, 'heat_finish' =>6, 'race_time' => '240.00', ), 
16 => array ( 'race_order' => 4, 'heat_nbr'=> 1, 'racer_id' => 1208, 'heat_finish' => 7, 'race_time' => '240.00', ), 
);

它按预期工作。下面的代码中包含了数组，因此我丢失了：

16 => array ( 'race_order' => 4, 'heat_nbr'=> 1, 'racer_id' => 1208, 'heat_finish' => 7, 'race_time' => '240.00', ), 

我看不出有什么好理由

//the insertion sort    
function sortArr(&$arr){    

    for($i = 0; $i<count($arr); $i++){      //loop that iterates through the array indexes    
    //set the current index as the current minimum    
        $index = $i;    
        $posOfMin = $arr[$i];    

        for($k = $i+1; $k < count($arr); $k++){     //loop that iterates from the current index to the array end to find the smallest heat_finish value    
            if($arr[$k]['heat_finish'] < $arr[$index]['heat_finish']){      //if a value smaller than the current assumed minimum is found, that value will be set as the current minimum    
                $index = $k;    
                $posOfMin = $arr[$k];    
            }    
        }    
    //swaps the position of the current index and the current minimum    
        $arr[$index] = $arr[$i];    
        $arr[$i] = $posOfMin;    
}    
}    

$arr = array (    
0 => array ( 'nbr_of_semis' => 2, 'race_order' => 1, 'heat_nbr' => 3, 'racer_id' => 1191, 'heat_finish' => 4, 'race_time' => '121.0000', ),    
1 => array ( 'nbr_of_semis' => 2, 'race_order' => 1, 'heat_nbr' => 3, 'racer_id' => 502, 'heat_finish' => 5, 'race_time' => '121.0000', ),    
2 => array ( 'nbr_of_semis' => 2, 'race_order' => 1, 'heat_nbr' => 3, 'racer_id' => 1269, 'heat_finish' => 6, 'race_time' => '121.0000', ),    
3 => array ( 'nbr_of_semis' => 2, 'race_order' => 1, 'heat_nbr' => 3, 'racer_id' => 723, 'heat_finish' => 7, 'race_time' => '121.0000', ),    
4 => array ( 'nbr_of_semis' => 2, 'race_order' => 2, 'heat_nbr' => 1, 'racer_id' => 24, 'heat_finish' => 4, 'race_time' => '130.0000', ),    
5 => array ( 'nbr_of_semis' => 2, 'race_order' => 2, 'heat_nbr' => 1, 'racer_id' => 1006, 'heat_finish' => 5, 'race_time' => '130.0000', ),    
6 => array ( 'nbr_of_semis' => 2, 'race_order' => 2, 'heat_nbr' => 1, 'racer_id' => 625, 'heat_finish' => 6, 'race_time' => '130.0000', ),    
7 => array ( 'nbr_of_semis' => 2, 'race_order' => 2, 'heat_nbr' => 1, 'racer_id' => 1115, 'heat_finish' => 7, 'race_time' => '130.0000', ),    
8 => array ( 'nbr_of_semis' => 2, 'race_order' => 3, 'heat_nbr' => 4, 'racer_id' => 121, 'heat_finish' => 3, 'race_time' => '136.0000', ),    
9 => array ( 'nbr_of_semis' => 2, 'race_order' => 3, 'heat_nbr' => 4, 'racer_id' => 620, 'heat_finish' => 4, 'race_time' => '136.0000', ),    
10 => array ( 'nbr_of_semis' => 2, 'race_order' => 3, 'heat_nbr' => 4, 'racer_id' => 487, 'heat_finish' => 5, 'race_time' => '136.0000', ),    
11 => array ( 'nbr_of_semis' => 2, 'race_order' => 3, 'heat_nbr' => 4, 'racer_id' => 645, 'heat_finish' => 6, 'race_time' => '136.0000', ),    
12 => array ( 'nbr_of_semis' => 2, 'race_order' => 4, 'heat_nbr' => 2, 'racer_id' => 379, 'heat_finish' => 3, 'race_time' => '152.0000', ),    
13 => array ( 'nbr_of_semis' => 2, 'race_order' => 4, 'heat_nbr' => 2, 'racer_id' => 17, 'heat_finish' => 4, 'race_time' => '152.0000', ),    
14 => array ( 'nbr_of_semis' => 2, 'race_order' => 4, 'heat_nbr' => 2, 'racer_id' => 65, 'heat_finish' => 5, 'race_time' => '152.0000', ),    
15 => array ( 'nbr_of_semis' => 2, 'race_order' => 4, 'heat_nbr' => 2, 'racer_id' => 860, 'heat_finish' => 6, 'race_time' => '152.0000', ),    
16 => array ( 'nbr_of_semis' => 2, 'race_order' => 4, 'heat_nbr' => 2, 'racer_id' => 226, 'heat_finish' => 7, 'race_time' => '152.0000', )    
);    

$n = count($arr);    
//loop that prints the array    
for($i = 0; $i < $n; $i++)    
    echo nl2br("Sort Order:". $i ." Race Order:" . $arr[$i]['race_order'] . "| Heat Number:" . $arr[$i]['heat_nbr'] . "| Racer:" . $arr[$i]['racer_id'] . "| Heat Finish:" . $arr[$i]['heat_finish'] . "| Race Time:" . $arr[$i]['race_time']."\n");    

//loop that separates and sorts the racers according to their race_order    
$max = 0;           //variable that will use to determine the maximum size of race_order    
for($i = 0; $i < $n; $i++){    
    if($i == 0)    
        $arr1[] = $arr[$i];    
    else{    
        if($arr[$i]['race_order'] == $arr[$i-1]['race_order'])    
            $arr1[] = $arr[$i];    
        else{    
            sortArr($arr1);    
            $arr2[] = $arr1;    
            if($max < count($arr1))    
                $max  = count($arr1);    
            unset($arr1);    
            $arr1[] = $arr[$i];    
        }    
    }    
}    
$arr2[] = $arr1;    

//destroy the current array    
unset($arr);    


//loop to combine the sorted arrays    
for($i = 0; $i < $max; $i++){    
    for($j = 0; $j < count($arr2); $j++){    
        if(count($arr2[$j]) > $i)    
            $arr[] = $arr2[$j][$i];    
    }    
}    

echo nl2br("Sorted\n");    
for($i = 0; $i < $n; $i++)    
    echo nl2br("Sort Order:". $i ." Race Order:" . $arr[$i]['race_order'] . "| Heat Number:" . $arr[$i]['heat_nbr'] . "| Racer:" . $arr[$i]['racer_id'] . "| Heat Finish:" . $arr[$i]['heat_finish'] . "| Race Time:" . $arr[$i]['race_time']."\n");    

//插入排序
函数sortArr（&$arr）{
对于（$i=0；$i数组（'nbr\u of_semis'=>2，'race\u order'=>1，'heat\u nbr'=>3，'racer\u id'=>1191，'heat\u finish'=>4，'race\u time'=>121.0000'，），
1=>数组（'nbr\U of_semis'=>2，'race\u order'=>1，'heat\u nbr'=>3，'racer\u id'=>502，'heat\u finish'=>5，'race\u time'=>121.0000'，），
2=>数组（'nbr\U of_semis'=>2，'race\u order'=>1，'heat\u nbr'=>3，'racer\u id'=>1269，'heat\u finish'=>6，'race\u time'=>121.0000'，），
3=>数组（'nbr\U of_semis'=>2，'race\u order'=>1，'heat\u nbr'=>3，'racer\u id'=>723，'heat\u finish'=>7，'race\u time'=>121.0000，），
4=>数组（'nbr\U of_semis'=>2，'race\u order'=>2，'heat\u nbr'=>1，'racer\u id'=>24，'heat\u finish'=>4，'race\u time'=>130.0000'，），
5=>数组（'nbr\U of_semis'=>2，'race\u order'=>2，'heat\u nbr'=>1，'racer\u id'=>1006，'heat\u finish'=>5，'race\u time'=>130.0000，），
6=>数组（'nbr\U of_semis'=>2，'race\u order'=>2，'heat\u nbr'=>1，'racer\u id'=>625，'heat\u finish'=>6，'race\u time'=>130.0000'，），
7=>数组（'nbr\U of_semis'=>2，'race\u order'=>2，'heat\u nbr'=>1，'racer\u id'=>1115，'heat\u finish'=>7，'race\u time'=>130.0000'，），
8=>数组（'nbr\U of_semis'=>2，'race\u order'=>3，'heat\u nbr'=>4，'racer\u id'=>121，'heat\u finish'=>3，'race\u time'=>136.0000'，），
9=>数组（'nbr\U of_semis'=>2，'race\u order'=>3，'heat\u nbr'=>4，'racer\u id'=>620，'heat\u finish'=>4，'race\u time'=>136.0000'，），
10=>数组（'nbr\U of_semis'=>2，'race\u order'=>3，'heat\u nbr'=>4，'racer\u id'=>487，'heat\u finish'=>5，'race\u time'=>136.0000，），
11=>数组（'nbr\U of_semis'=>2，'race\u order'=>3，'heat\u nbr'=>4，'racer\u id'=>645，'heat\u finish'=>6，'race\u time'=>136.0000，），
12=>数组（'nbr_of u semis'=>2，'race_order'=>4，'heat_nbr'=>2，'racer_id'=>379，'heat_finish'=>3，'race_time'=>152.0000'，），
13=>数组（'nbr\U of_semis'=>2，'race\u order'=>4，'heat\u nbr'=>2，'racer\u id'=>17，'heat\u finish'=>4，'race\u time'=>152.0000'，），
14=>数组（'nbr\U of_semis'=>2，'race\u order'=>4，'heat\u nbr'=>2，'racer\u id'=>65，'heat\u finish'=>5，'race\u time'=>152.0000'，），
15=>数组（'nbr\U of_semis'=>2，'race\u order'=>4，'heat\u nbr'=>2，'racer\u id'=>860，'heat\u finish'=>6，'race\u time'=>152.0000，），
16=>数组（'nbr\U of_semis'=>2，'race\u order'=>4，'heat\u nbr'=>2，'racer\u id'=>226，'heat\u finish'=>7，'race\u time'=>152.0000，）
);    
$n=计数（$arr）；
//打印阵列的循环
对于（$i=0；$i<$n；$i++）
echo nl2br（“排序顺序：.$i.”比赛顺序：.$arr[$i]['Race\u Order']。”；赛区编号：.$arr[$i]['Heat\u nbr']。“；赛车手：.$arr[$i]['Racer\u id']。”；赛区终点：.$arr[$i]['Heat\u Finish']。“；赛区时间：.$arr[$i]['Race\n”）；
//根据参赛者的比赛顺序对其进行分类的回路
$max=0；//用于确定竞态订单最大大小的变量
对于（$i=0；$i<$n；$i++）{
如果（$i==0）
$arr1[]=$arr[$i]；
否则{
如果（$arr[$i]['race\u order']=$arr[$i-1]['race\u order']））
$arr1[]=$arr[$i]；
否则{
索塔尔（1美元）；
$arr2[]=$arr1；
如果（$max$i）
$arr[]=$arr2[$j][$i]；
}    
}    
echo nl2br（“已排序的\n”）；
对于（$i=0；$i<$n；$i++）
echo nl2br（“排序顺序：.$i.”比赛顺序：.$arr[$i]['Race\u Order']。”；赛区编号：.$arr[$i]['Heat\u nbr']。“；赛车手：.$arr[$i]['Racer\u id']。”；赛区终点：.$arr[$i]['Heat\u Finish']。“；赛区时间：.$arr[$i]['Race\n”）；

这里出了问题：

// less than $max
for($i = 0; $i < $max; $i++){

//小于$max
对于（$i=0；$i<$max；$i++）{

$max是基于$arr1的count（）的值，您应该这样做

// less than OR equal to $max
for($i = 0; $i <= $max; $i++){

//小于或等于$max
对于（$i=0；$i这里出现了错误：

// less than $max
for($i = 0; $i < $max; $i++){

//小于$max
对于（$i=0；$i<$max；$i++）{

$max是基于$arr1的count（）的值，您应该这样做

// less than OR equal to $max
for($i = 0; $i <= $max; $i++){

//小于或等于$max
对于（$i=0；$i），我已经回答了类似的问题：为什么要构建自己的排序函数？为什么不使用一个简单的比较器函数
usort（）
？您可能会丢失条目，因为代码中的一个错误导致在执行
$arr[$index]
和
$arr[$i]时它被覆盖
assignments。试过了。没用。我不明白为什么它可以完美地处理一组数据，而不能处理另一组非常相似的数据。@Alex我很感激，但这不是我需要的。我需要在多个字段上排序。而且不是按自然排序顺序排序。为什么要调用count（）在同一个数组上执行了54次？同样，您的错误是否在这里：“for（$k=$i+1；”？我已经回答了类似的问题：为什么您要构建自己的排序函数？为什么不使用一个简单的比较器函数来
usort（）
？您可能会丢失条目，因为代码中的一个错误导致它在执行
$arr[$index]时被覆盖
和
$arr[$i]
分配。尝试过。没有效果。我不明白为什么会这样