Question

这是我的PHP代码。这将从MySQL数据库中获取数据并存储在数组中。

所以，最初我有这个数组

$ array_init;

的print_r（$ array_init）;

Array ( 
    [0] => Array ( [id] => 2 [class_name] => Jr KG ) 
    [1] => Array ( [id] => 3 [class_name] => Sr KG ) 
    [2] => Array ( [id] => 4 [class_name] => I ) 
    [3] => Array ( [id] => 5 [class_name] => II ) 
    [4] => Array ( [id] => 6 [class_name] => III ) 
    [5] => Array ( [id] => 7 [class_name] => IV ) 
    [6] => Array ( [id] => 8 [class_name] => V ) 
    [7] => Array ( [id] => 9 [class_name] => VI ) 
    [8] => Array ( [id] => 10 [class_name] => VII ) 
    [9] => Array ( [id] => 11 [class_name] => VIII ) 
    [10] => Array ( [id] => 12 [class_name] => IX ) 
    [11] => Array ( [id] => 13 [class_name] => X ) 
)

我想在编码时进行快速遍历

所以更快的编码

我想创建一个像这样的关联数组：

Array ( 
    [2] => Jr KG ) 
    [3] => Sr KG ) 
    [4] => I ) 
    [5] => II ) 
    [6] => III ) 
    [7] => IV ) 
    [8] => V ) 
    [9] => VI ) 
    [10] => VII ) 
    [11] => VIII ) 
    [12] => IX ) 
    [13] => X ) 
)

我试过这个

foreach ($array_init as $row_class) {
        $classes[] = [$row_class['id']=>$row_class['class_name']];
}

我得到了这个

Array ( [0] => Array ( 
    [2] => Jr KG ) 
    [1] => Array ( [3] => Sr KG ) 
    [2] => Array ( [4] => I ) 
    [3] => Array ( [5] => II ) 
    [4] => Array ( [6] => III ) 
    [5] => Array ( [7] => IV ) 
    [6] => Array ( [8] => V ) 
    [7] => Array ( [9] => VI ) 
    [8] => Array ( [10] => VII ) 
    [9] => Array ( [11] => VIII ) 
    [10] => Array ( [12] => IX ) 
    [11] => Array ( [13] => X ) 
)

顺便说一下，由于问题和解决方案都不同，所以并不重复。

Answer 1

使用array_column功能：

$classes = array_column($array_init, 'class_name', 'id');

索引数组到关联数组 - PHP

1 个答案: