.
<?php
/*
* 找子欄目
*/
$area=array(
array('id'=>1,'name'=>'中國','parent'=>0),
array('id'=>2,'name'=>'廣東','parent'=>1),
array('id'=>3,'name'=>'深圳','parent'=>2),
array('id'=>4,'name'=>'湖南','parent'=>1),
array('id'=>5,'name'=>'長沙','parent'=>4)
);
function findson($arr,$id=0) {
$son=array();
foreach ($arr as $value) {
if ($value['parent']==$id) {
$son[]=$value;
}
}
return $son;
}
/*
* 找子孫樹
* @param array 傳入的數組
* @param int 傳入的id
*/
function substree($arr,$id=0,$level=1) {
static $grandson=array();
foreach ($arr as $value) {
if ($value['parent']==$id) {
$value['level']=$level;
$grandson[]=$value;
substree($arr,$value['id'],$level+1);
}
}
return $grandson;
}
//var_dump( findson($area,1));
echo "</br>";
//var_dump(substree($area,2));
/*
* 爲了讓它顯示縮進效果
*/
$tt=substree($area,0,1);
foreach ($tt as $value) {
echo str_repeat(' ', $value["level"]).$value["name"]."</br>";
}
?>