php多维数组去除空元素

我就是我 2022-12-23 06:55 159阅读 0赞

<?php
    /** * 去除多维数组中的空值 * @author * @return mixed * @param $arr 目标数组 * @param array $values 去除的值 默认 去除 '',null,false,0,'0',[] */
    function filter_array($arr, $values = ['', null, false, 0, '0',[]]) { 
        foreach ($arr as $k => $v) { 
            if (is_array($v) && count($v)>0) { 
                $arr[$k] = filter_array($v, $values);
            }
            foreach ($values as $value) { 
                if ($v === $value) { 
                    unset($arr[$k]);
                    break;
                }
            }
        }
        return $arr;
    }
    
    $arr = array(
        array('name'=>"zhangsan",'age'=>18,'hobby'=>"reading"),
        array('name'=>"lisi",'age'=>19,'hobby'=>""),
        array()
    );
    var_dump($arr);
    $values = ['', null, false, 0, '0',[]];
    var_dump(filter_array($arr, $values));

处理前：

array(3) {
      [0]=>
      array(3) {
        ["name"]=>
        string(8) "zhangsan"
        ["age"]=>
        int(18)
        ["hobby"]=>
        string(7) "reading"
      }
      [1]=>
      array(3) {
        ["name"]=>
        string(4) "lisi"
        ["age"]=>
        int(19)
        ["hobby"]=>
        string(0) ""
      }
      [2]=>
      array(0) {
      }
    }

处理后：

array(2) {
      [0]=>
      array(3) {
        ["name"]=>
        string(8) "zhangsan"
        ["age"]=>
        int(18)
        ["hobby"]=>
        string(7) "reading"
      }
      [1]=>
      array(2) {
        ["name"]=>
        string(4) "lisi"
        ["age"]=>
        int(19)
      }
    }

如果要删除hobby值为空的数据，可以使用array\_filter函数。

/** * 使用array_filter函数 */
    $arr2 = array_filter($arr, function ($value) { 
        return !empty($value['hobby']);
    });
    var_dump($arr2);

效果：

array(1) {
      [0]=>
      array(3) {
        ["name"]=>
        string(8) "zhangsan"
        ["age"]=>
        int(18)
        ["hobby"]=>
        string(7) "reading"
      }
    }

--------------------

**原文链接：**  
[https://www.cnblogs.com/phpshen/p/6027388.html][https_www.cnblogs.com_phpshen_p_6027388.html]

**参考文章地址：**  
[https://www.cnblogs.com/yehuisir/p/13576568.html][https_www.cnblogs.com_yehuisir_p_13576568.html]

[https_www.cnblogs.com_phpshen_p_6027388.html]: https://www.cnblogs.com/phpshen/p/6027388.html
[https_www.cnblogs.com_yehuisir_p_13576568.html]: https://www.cnblogs.com/yehuisir/p/13576568.html