转换为一个数组删除php中的重复值

Question

每个数组都持有不同类型的考试，具有相同的学生Id.second数组值，推送第一个数组接收值。

阵列1

Array ( 
    [0] => Array ( [student_id] => 1190101 [stname] => Student 1 [remarks] => [totals] => 21 ) 
    [1] => Array ( [student_id] => 1190102 [stname] => Student 2 [remarks] => 1 [totals] => 6 ) 
    [2] => Array ( [student_id] => 1190103 [stname] => Student 3 [remarks] => 
        [totals] => 11 ) 
    [3] => Array ( [student_id] => 1190104 [stname] => Student 4 [remarks] => 1 [totals] => 6 ) 
    [4] => Array ( [student_id] => 1190105 [stname] => Student 5 [remarks] => 1 [totals] => 6 ) 
    [5] => Array ( [student_id] => 1190106 [stname] => Student 6 [remarks] => 1 [totals] => 6 ) 
    [6] => Array ( [student_id] => 1190107 [stname] => Student 7 [remarks] => 1 [totals] => 6 ) 
    [7] => Array ( [student_id] => 1190108 [stname] => Student 8 [remarks] => 1 [totals] => 6 ) 
    [8] => Array ( [student_id] => 1190109 [stname] => Student 9 [remarks] => 1 [totals] => 6 ) 
    [9] => Array ( [student_id] => 1190110 [stname] => Student 10 [remarks] => 1 [totals] => 6 ) )

阵列2

Array ( 
    [0] => Array ( [student_id] => 1190104 [stname] => Student 4 [remarks] => [totals] => 5 ) 
    [1] => Array ( [student_id] => 1190105 [stname] => Student 5 [remarks] => [totals] => 5 ) )

阵列3

Array (
    [0] => Array ( [student_id] => 1190106 [stname] => Student 6 [remarks] => [totals] => 5 ) 
    [1] => Array ( [student_id] => 1190107 [stname] => Student 7 [remarks] => [totals] => 5 )
    [2] => Array ( [student_id] => 1190108 [stname] => Student 8 [remarks] => [totals] => 5 ) 
)

需要像这样的单一多维数组

Array ( 
    [0] => Array ( [student_id] => 1190101 [stname] => Student 1 [remarks] => 1 [totals] => 21 ) 
    [1] => Array ( [student_id] => 1190102 [stname] => Student 2 [remarks] => 1 [totals] => 6 ) 
    [2] => Array ( [student_id] => 1190103 [stname] => Student 3 [remarks] => [totals] => 11 ) 
    [3] => Array ( [student_id] => 1190104 [stname] => Student 4 [remarks] => 1 [totals] => 6*[totals] => 5* ) 
    [4] => Array ( [student_id] => 1190105 [stname] => Student 5 [remarks] => 1 [totals] =>4 [totals] => 5 ) 
    [5] => Array ( [student_id] => 1190106 [stname] => Student 6 [remarks] => 1 [totals] => 6[totals] => 5 ) 
    [6] => Array ( [student_id] => 1190107 [stname] => Student 7 [remarks] => 1 [totals] => 6 [totals] => 5 ) 
    [7] => Array ( [student_id] => 1190108 [stname] => Student 8 [remarks] => 1 [totals] => 6 ) 
    [8] => Array ( [student_id] => 1190109 [stname] => Student 9 [remarks] => 1 [totals] => 6 [totals] => 5 ) 
    [9] => Array ( [student_id] => 1190110 [stname] => Student 10 [remarks] => 1 [totals] => 6 ) 
)

Answer 1

您可以迭代每个数组并将所有数据放入一个新的数组中，使用学生ID作为键：

$new_array = [];
$old_arrays = [$array1, $array2, $array3];

foreach( $old_arrays as $old_array ) {
    foreach( $old_array as $key => $value ) {
        $new_array[ $old_array['student_id'] ][$key] = $value;
    }
}

因此，每当它找到一个已经被添加的学生时，它将再次添加信息。如果array2有array1没有的关于学生#123的数据，那么它将被按键添加到新数组中的学生#123的数组中。

这假设每个学生ID都是正确的，每个ID只有一个学生ID，每个学生只有一个ID，并且在不同的数组中没有任何其他信息(如stname或便条)相互冲突。