PHP如何用array_filter过滤数组?
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>
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>
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>
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>
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>
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>
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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