PHP将多维数组转换为二维数组的方法：
<?php
$a = array(
0=>array(
'categoryid'=>1,
'name'=>"AA1",
'parent'=>0,
'childs'=>array(
0=>array(
'categoryid'=>2,
'name'=>"BB1",
'parent'=>1,
'childs'=>array(
0=>array(
'categoryid'=>3,
'name'=>"CC",
'parent'=>2,
'childs'=>array(
0=>array(
'categoryid'=>4,
'name'=>"dd1",
'parent'=>3,
),
1=>array(
'categoryid'=>5,
'name'=>"dd2",
'parent'=>3,
),
),
),
),
),
1=>array(
'categoryid'=>6,
'name'=>"BB2",
'parent'=>1,
),
),
),
1=>array(
'categoryid'=>7,
'name'=>"AA2",
'parent'=>0,
)
);
function imp($tree, $children='childs') {
$imparr = array();
foreach($tree as $w) {
if(isset($w[$children])) {
$t = $w[$children];
unset($w[$children]);
$imparr[] = $w;
if(is_array($t)) $imparr = array_merge($imparr, imp($t, $children));
} else {
$imparr[] = $w;
}
}
return $imparr;
}
var_dump(imp($a));
?>输出：
array (size=7)
0 =>
array (size=3)
'categoryid' => int 1
'name' => string 'AA1' (length=3)
'parent' => int 0
1 =>
array (size=3)
'categoryid' => int 2
'name' => string 'BB1' (length=3)
'parent' => int 1
2 =>
array (size=3)
'categoryid' => int 3
'name' => string 'CC' (length=2)
'parent' => int 2
3 =>
array (size=3)
'categoryid' => int 4
'name' => string 'dd1' (length=3)
'parent' => int 3
4 =>
array (size=3)
'categoryid' => int 5
'name' => string 'dd2' (length=3)
'parent' => int 3
5 =>
array (size=3)
'categoryid' => int 6
'name' => string 'BB2' (length=3)
'parent' => int 1
6 =>
array (size=3)
'categoryid' => int 7
'name' => string 'AA2' (length=3)
'parent' => int 0更多相关知识，请访问 PHP中文网！！
