PHP 数组函数

<?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
)

array_column()
array_column() 返回输入数组中某个单一列的值。array_column(array,column_key,index_key);

<?php

$a = array("1","2","3");

$b = array_chunk($a,2);

echo "<pre>";
print_r($b);


?>
<pre>Array
(
    [0] => Array    
        (
            [0] => 1
            [1] => 2
        )

    [1] => Array
        (
            [0] => 3
        )

)

array_chunk() 函数把数组分割为新的数组块。

array_chunk(array,size,preserve_key);

$fname=array("Bill","Steve","Mark");
$age=array("60","56","31");

$c=array_combine($fname,$age);
print_r($c);

Array
(
[Bill] => 60
[Steve] => 56
[Mark] => 31
)