array_column:将一个多维数组的转换为一个键值对数组

 
$array = [
    ['id' => 1,'name' => 'tom','age' => 18],
    ['id' => 2,'name' => 'jack','age' => 19],
    ['id' => 3,'name' => 'mick','age' => 20],
    ['id' => 4,'name' => 'lucy','age' => 21],
    ['id' => 5,'name' => 'bill','age' => 22],
];
  
$arr = array_column($array,'name','id');
  
echo '<pre>';
print_r($arr);
  
result:
Array
(
    [1] => tom
    [2] => jack
    [3] => mick
    [4] => lucy
    [5] => bill
)