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PHP如何用array_filter过滤数组?

WBOY
Release: 2016-06-06 20:26:54
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数据库输出数组是

<code>Array
(
    [0] => Array
        (
            [id] => 1
            [name] => 你好,234
            [cate] =>  生活日记
       )

    [1] => Array
        (
            [id] => 2
            [name] => 79798
            [cate] => 摄影美图

        )

    [2] => Array
        (
            [id] => 3
            [name] => 567567
            [cate] =>  生活日记
       )

)</code>
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过滤里面cate = 摄影美图,其它全部保留,效果是

<code>Array
(
   [0] => Array
       (
           [id] => 1
           [name] => 你好,234
           [cate] =>  生活日记
       )

   [1] => Array
       (
           [id] => 2
           [name] => 79798
           [cate] => 生活日记

      )
)</code>
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如何用array_filter实现呢? 感觉array_filter不太好用。

回复内容:

数据库输出数组是

<code>Array
(
    [0] => Array
        (
            [id] => 1
            [name] => 你好,234
            [cate] =>  生活日记
       )

    [1] => Array
        (
            [id] => 2
            [name] => 79798
            [cate] => 摄影美图

        )

    [2] => Array
        (
            [id] => 3
            [name] => 567567
            [cate] =>  生活日记
       )

)</code>
Copy after login
Copy after login

过滤里面cate = 摄影美图,其它全部保留,效果是

<code>Array
(
   [0] => Array
       (
           [id] => 1
           [name] => 你好,234
           [cate] =>  生活日记
       )

   [1] => Array
       (
           [id] => 2
           [name] => 79798
           [cate] => 生活日记

      )
)</code>
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Copy after login

如何用array_filter实现呢? 感觉array_filter不太好用。

啥也不说,直接上代码,可惜php的闭包跟js一样又臭又长:

<code>$data = [
   [ 'id' => 1, 'name' => '你好,234', 'cate' => '生活日记'],
   [ 'id' => 2, 'name' => '79798', 'cate' => '摄影美图'],
   [ 'id' => 3, 'name' => '567567', 'cate' => '生活日记'],
];

$filtered = array_filter($data, function($item){ 
                 return $item['cate'] !== '摄影美图'; 
            });
print_r($filtered);</code>
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注意看array_filter的第二个参数,第二个参数是一个自定义函数。这个自定义函数是为了设置过滤条件。

<code><?php $arr = array(
        array('id'=>1, 'cate'=>"生活日记"),
        array('id'=>2, 'cate'=>"摄影美图"),
    );
    var_dump($arr);
    
    function filter($rows){
        if($rows['cate']==="摄影美图"){
            return false;
        }else{
            return true;
        }
    }
    
    $arr = array_filter($arr, 'filter');
    var_dump($arr);

</code>
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我觉得不用array_filter也能达到目的呀

<code><?php $oriArr = array(
       0 => array('id' => '1', 'name' => '你好,234', 'cate' => '生活日记'),
       1 => array('id' => '2', 'name' => '79798', 'cate' => '摄影美图'),
       2 => array('id' => '3', 'name' => '567567', 'cate' => '生活日记'),
   );

   $resultArr = array();
   foreach ($oriArr as $key => $value)
   {
       if ($value['cate'] === '摄影美图')
       {
           continue;
       }
       else
       {
           $resultArr[] = $value;
       }
   }
   print_r($resultArr);</code>
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