转换为一个数组删除php中的重复值

Question

每个数组都包含具有相同学生 ID 的不同类型的考试。 数组值推送第一个数组接收值。

数组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 ) )

数组2

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

数组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 ) 
)

需要单个多维数组，例如

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;
    }
}

因此每次它找到已添加的学生时，它都会再次添加信息。如果 array2 有关于 123 号学生的一条数据，而 array1 没有，则会通过 key 将其添加到新数组中的 123 号学生的数组中。

这假设每个学生 ID 都是正确的，并且每个 ID 中只有一个学生，每个学生只有一个 ID，并且其他信息（如 stname 或备注）在不同的数组中没有冲突。