内爆的多阵列

Question

我有数组：

$array = array(
    0 => array('first' => 'aaa', 
       'second' => 'bbb'), 
    1 => array('first' => 'erw', 
       'second' => 'wer'), 
    2 => array('first' => 'aaawe', 
       'second' => '345'), 
    3 => array('first' => 'aa345a', 
       'second' => 'dfgdfg'), 
); 

，我想得值与破灭：

$first = implode(';', $array['first']); 
$second = implode(';', $array['second']); 

但当然这不是工作。这样做的最好方法是什么？

Answer 1

随着PHP 5.5存在功能array_column()：http://php.net/array_column

$first = implode(';', array_column($array, 'first')); 
// same for $second 

PS：为了向后相容表象检查还https://github.com/ramsey/array_column了

---

按照要求，一些 “简单”（PHP 5.3兼容）：

$first = array_reduce($array, function ($array, $string) { return ($string !== null?"$string;":"").$array['first']; }, null); 

Answer 2

你可以做到这一点没有array_column();

<?php 
$array = array(
    0 => array('first' => 'aaa', 
       'second' => 'bbb'), 
    1 => array('first' => 'erw', 
       'second' => 'wer'), 
    2 => array('first' => 'aaawe', 
       'second' => '345'), 
    3 => array('first' => 'aa345a', 
       'second' => 'dfgdfg'), 
); 
foreach ($array as $row) 
{ 
    $values[] = $row['first']; 
    $val[] = $row['second']; 
} 
$first= implode(',', $values); 
$second= implode(',', $val); 
echo $first."<br>"; 
echo $second; 
?> 

我测试，这给了我输出

aaa,erw,aaawe,aa345a 
bbb,wer,345,dfgdfg