请问一下为什么我print_r 输出的值是对的,然后想马值 $location return就是return不出来.谢谢,望高手赐教!!! 急

[suchengfei]

function fuc_location($ID,$location){
global $table_class;
//if(!$ID){ print_r($location); return $location;}
if($ID){
$sql="select * from $table_class where ID=$ID";
$result=mysql_query($sql) or die(mysql_error());
$row1 = mysql_fetch_array($result);
$location[]=$row1["ID"]."".$row1["class_name"]."";

fuc_location($row1["parentID"],$location); //
}else{
print_r($location);return $location;}

}
请问一下为什么我print_r 输出的值是对的,然后想马值 $location return就是return不出来.谢谢,望高手赐教!!!

[princekey]

不知所云

[suchengfei]

??这么清楚还不知所云??? 看最后一句，print_r($location);return $location;} print_r出来的值是有的 但是用return，函数就是没值回去.:(

[shubin_lin]

确实不知道楼主在说什么，呵呵，给两个回答，１,return是返回值，而不会打印出来，２,$location好象是数组，如果是数组要打印不可以直接echo $location．

[foolbirdflyfirst]

static $location;

[suchengfei]

晕了,这么明白还听不懂,我用return是出不来值的 所以用print_r打印看看是有值的,明白了吗,超级晕晕...

[suchengfei]

如果return出来有值我就不用问了,就是不出,但是我用print_r打印值是有的,这回应该明白了吧,不明白本人也没办法,望高人指点!!

[foolbirdflyfirst]

lz知不知道什么是局部变量?你应该将$location设为静态变量或者全局变量，这样在整个递归调用中都会应用同一个变量．

[foolbirdflyfirst]

改写试试:

function fuc_location($ID){
global $table_class;
static $location = array();

//if(!$ID){ print_r($location); return $location;}
if($ID){
$sql="select * from $table_class where ID=$ID";
$result=mysql_query($sql) or die(mysql_error());
$row1 = mysql_fetch_array($result);
$location[]=$row1["ID"]."".$row1["class_name"]."";

fuc_location($row1["parentID"]); //
}else{
print_r($location);return $location;}

}

[foolbirdflyfirst]

应该不要else，否则无法return.
function fuc_location($ID){
global $table_class;
static $location = array();

//if(!$ID){ print_r($location); return $location;}
if($ID){
$sql="select * from $table_class where ID=$ID";
$result=mysql_query($sql) or die(mysql_error());
$row1 = mysql_fetch_array($result);
$location[]=$row1["ID"]."".$row1["class_name"]."";

fuc_location($row1["parentID"]); //
}
return $location;

}

[SysTem128]

<?php
function   fuc_location($ID,$location){
	global   $table_class;
	//if(!$ID){   print_r($location);   return   $location;}
	if($ID){
		$sql="select   *   from   $table_class   where   ID=$ID";
		$result=mysql_query($sql)   or   die(mysql_error());
		$row1   =   mysql_fetch_array($result);
		$location[]=$row1["ID"]."".$row1["class_name"]."";
		return fuc_location($row1["parentID"],$location);   //
	}else{
		return   $location;
	}
}
?>