PHP开发技巧（三）-多维数组转化为一维数组的代码详解

<?php  
  
/** 
 * ======================================= 
 * Created by Zhihua_W. 
 * Author: Zhihua_W 
 * Date: 2016/11/28 0003 
 * Time: 上午 9:11 
 * Project: PHP开发小技巧 
 * Power: 实现多维数组转化为一维数组 
 * ======================================= 
 */  
  
/** 
 * 多维数组转化为一维数组 
 * @param array $array 多维数组 
 * @return array $result_array 一维数组 
 */  
function array_multi2single($array)  
{  
    //首先定义一个静态数组常量用来保存结果  
    static $result_array = array();  
    //对多维数组进行循环  
    foreach ($array as $value) {  
        //判断是否是数组，如果是递归调用方法  
        if (is_array($value)) {  
            array_multi2single($value);  
        } else  //如果不是，将结果放入静态数组常量  
            $result_array [] = $value;  
    }  
    //返回结果（静态数组常量）  
    return $result_array;  
}  
  
$arr = array(  
    array(  
        &#39;name&#39; => &#39;a&#39;,  
        &#39;sex&#39; => &#39;m&#39;,  
        &#39;sort&#39; => 5  
    ),  
    array(  
        &#39;name&#39; => &#39;c&#39;,  
        &#39;sex&#39; => &#39;m&#39;,  
        &#39;sort&#39; => 8  
    ),  
    array(  
        &#39;name&#39; => &#39;g&#39;,  
        &#39;sex&#39; => &#39;m&#39;,  
        &#39;sort&#39; => 3  
    ),  
    array(  
        &#39;name&#39; => &#39;e&#39;,  
        &#39;sex&#39; => &#39;w&#39;,  
        &#39;sort&#39; => 6  
    ),  
    array(  
        &#39;name&#39; => &#39;b&#39;,  
        &#39;sex&#39; => &#39;w&#39;,  
        &#39;sort&#39; => 2  
    ),  
);  
  
print_r(array_multi2single($arr));  
  
?>

Array  
(  
    [0] => a  
    [1] => m  
    [2] => 5  
    [3] => c  
    [4] => m  
    [5] => 8  
    [6] => g  
    [7] => m  
    [8] => 3  
    [9] => e  
    [10] => w  
    [11] => 6  
    [12] => b  
    [13] => w  
    [14] => 2  
)