我明白了
可以这么写
foreach($tree as $key=>$array_number){
foreach($array_number as $key1=>$number){
foreach($number as $number1){
}
}
}
可以这么写
foreach($tree as $key=>$array_number){
foreach($array_number as $key1=>$number){
foreach($number as $number1){
}
}
}
foreach($ar as $k=>$v) {
if(is_array($v)) {
echo str_repeat(" ",$n)."$k<br>";
show($v,$n+1);
}else
echo str_repeat(" ",$n)."$v<br>";
}
}show($tree);