怎么在PHP中利用递归遍历多维数组-创新互联
本篇文章给大家分享的是有关怎么在PHP中利用递归遍历多维数组,小编觉得挺实用的,因此分享给大家学习,希望大家阅读完这篇文章后可以有所收获,话不多说,跟着小编一起来看看吧。
具体如下:
1,'parentid'=>0,'name'=>'中国','img'=>'52091199'); $data[]=array('id'=>1,'parentid'=>0,'name'=>'中国'); $data[]=array('id'=>2,'parentid'=>0,'name'=>'美国'); $data[]=array('id'=>3,'parentid'=>0,'name'=>'韩国'); $data[]=array('id'=>4,'parentid'=>1,'name'=>'北京'); $data[]=array('id'=>5,'parentid'=>1,'name'=>'上海'); $data[]=array('id'=>6,'parentid'=>1,'name'=>'广西'); $data[]=array('id'=>7,'parentid'=>6,'name'=>'桂林'); $data[]=array('id'=>8,'parentid'=>6,'name'=>'南宁'); $data[]=array('id'=>9,'parentid'=>6,'name'=>'柳州'); $data[]=array('id'=>10,'parentid'=>2,'name'=>'纽约'); $data[]=array('id'=>11,'parentid'=>2,'name'=>'华盛顿'); $data[]=array('id'=>12,'parentid'=>3,'name'=>'首尔'); $tree=build_tree($data,0); //echo memory_get_usage(); print_r($tree); function findChild(&$arr,$id){ $childs=array(); foreach ($arr as $k => $v){ if($v['parentid']== $id){ $childs[]=$v; } } return $childs; } function build_tree($rows,$root_id){ $childs=findChild($rows,$root_id); if(empty($childs)){ return null; } foreach ($childs as $k => $v){ $rescurTree=build_tree($rows,$v['id']); if( null != $rescurTree){ $childs[$k]['childs']=$rescurTree; } } return $childs; } ?>
运行结果:
Array ( [0] => Array ( [id] => 1 [parentid] => 0 [name] => 中国 [childs] => Array ( [0] => Array ( [id] => 4 [parentid] => 1 [name] => 北京 ) [1] => Array ( [id] => 5 [parentid] => 1 [name] => 上海 ) [2] => Array ( [id] => 6 [parentid] => 1 [name] => 广西 [childs] => Array ( [0] => Array ( [id] => 7 [parentid] => 6 [name] => 桂林 ) [1] => Array ( [id] => 8 [parentid] => 6 [name] => 南宁 ) [2] => Array ( [id] => 9 [parentid] => 6 [name] => 柳州 ) ) ) ) ) [1] => Array ( [id] => 2 [parentid] => 0 [name] => 美国 [childs] => Array ( [0] => Array ( [id] => 10 [parentid] => 2 [name] => 纽约 ) [1] => Array ( [id] => 11 [parentid] => 2 [name] => 华盛顿 ) ) ) [2] => Array ( [id] => 3 [parentid] => 0 [name] => 韩国 [childs] => Array ( [0] => Array ( [id] => 12 [parentid] => 3 [name] => 首尔 ) ) ) )
以上就是怎么在PHP中利用递归遍历多维数组,小编相信有部分知识点可能是我们日常工作会见到或用到的。希望你能通过这篇文章学到更多知识。更多详情敬请关注创新互联行业资讯频道。
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