假设数组
array(0 => array('catid' => 10 , 'parent' => '1') , 1 => array('catid' => 11 , 'parent' => 1) , array('catid' => 21 , 'parent' => 2) );我希望只保留 parent 为2的值要怎么做呢?
小弟新人希望大侠帮忙 谢谢!
php
array(0 => array('catid' => 10 , 'parent' => '1') , 1 => array('catid' => 11 , 'parent' => 1) , array('catid' => 21 , 'parent' => 2) );我希望只保留 parent 为2的值要怎么做呢?
小弟新人希望大侠帮忙 谢谢!
php
$t = array_map(function($v) { return array('parent' => $v['parent']); }, $a);
/*
php 5.2.x 写作
$t = array_map(create_function('$v', 'return array("parent" => $v["parent"]);'), $a);
*/
print_r($t);Array
(
[0] => Array
(
[parent] => 1
) [1] => Array
(
[parent] => 1
) [2] => Array
(
[parent] => 2
))
{
foreach($arr2 as $v) $tmpArr[] = $v[$key];
foreach($arr1 as $k=>$v) if(in_array($v[$key], $tmpArr)) $arr[$k] = $v;
return $arr;
}
$a=array(0 => array('catid' => 10 , 'parent' => '1') , 1 => array('catid' => 11 , 'parent' => 1) , array('catid' => 21 , 'parent' => 2) );
$b=array(array('parent' => 2)); //这个自己编一个类似数组,包含所需key和值就行
$c= intersect2nd($a, $b, 'parent');
var_export($c);记忆中这是版主唠叨的代码,不敢僭越
foreach($a as $r) {
$t[] = array_intersect_key($r, array('parent' => ''));
}
嘿嘿,我说的是思路,我改成自己class里面一个方法用了,现在copy改动后的版本出来而已
print_r($t);
Array
(
[2] => Array
(
[catid] => 21
[parent] => 2
))