认真理解下面两个例子,就可以掌握PHP递归了
function test($n){
if($n>0){
echo 'a'.$n."\n";
$n = test($n-1);
}else{
echo 'b'.$n."\n";
return $n;
}
echo 'c'.$n."\n";
return $n;
}
echo test(2);exit;
返回结果:
a2
a1
b0
c0
c0
0
华丽分割线--------------------------------
function test($n){
if($n>0){
echo 'a'.$n."\n";
test($n-1);
}else{
echo 'b'.$n."\n";
return $n;
}
echo 'c'.$n."\n";
return $n;
}
echo test(2);exit;
返回结果:
a2
a1
b0
c1
c2
2