array_map()与array_shift()搭配使用 PK array_column()函数

array_map()与arra_shift()搭配使用，还是来看例子吧，比较直观一点

 1 <?php
 2     $user = array( 
 3         0 => array( 
 4         'name' => '张三', 
 5         'id' => 1, 
 6         'email' => 'zhangsan@sina.com', 
 7         ), 
 8         7 => array( 
 9         'name' => '李四', 
10         'id' => 2, 
11         'email' => 'lisi@163.com', 
12         ), 
13         9 => array( 
14         'name' => '王五', 
15         'id' => 5, 
16         'email' => '10000@qq.com', 
17         )
18     );
19     $ids = array(); 
20     $ids = array_map('array_shift', $user);
21     echo "<pre>";  
22     print_r($ids);
23     echo "</pre>";

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