<?php
// 表示由数据库返回的可能记录集的数组
$a = array(
  array(
    \'id\' => 5698,
    \'first_name\' => \'Bill\',
    \'last_name\' => \'Gates\',
  ),
  array(
    \'id\' => 4767,
    \'first_name\' => \'Steve\',
    \'last_name\' => \'Jobs\',
  ),
  array(
    \'id\' => 3809,
    \'first_name\' => \'Mark\',
    \'last_name\' => \'Zuckerberg\',
  )
);

$last_names = array_column($a, \'last_name\');
print_r($last_names);
?>

输出
Array
(
  [0] => Gates
  [1] => Jobs
  [2] => Zuckerberg
)

<?php
$fname=array("Peter","Ben","Joe");
$age=array("35","37","43");
$c=array_combine($fname,$age);
print_r($c);
?>
输出：
Array ( [Peter] => 35 [Ben] => 37 [Joe] => 43 )