Getting variables from functions

[Savour]

Hello,

I am still trying fully grasp functions in php. I wrote a script that picks a random number between 1 and whatever number is entered when calling the function. I can echo the number it creates in the its function and then I call it to get the number echoed. I am trying to randomly display an image from a folder. But I can not call the variable and its really weighing me down because I want get the images size with getimagesize. I have tried global but its not working. Any help would be great.

Thanks so much

Here is what I have and tried commented out:

function rand_uni($high){

$num_to_convert=rand(1,$high);


if($num_to_convert<10){
    $rand_num_out="000" . $num_to_convert ;    
}else if($num_to_convert<100){
    $rand_num_out="00" . $num_to_convert ;    
}else if($num_to_convert<1000){
    $rand_num_out="0" . $num_to_convert ;    
}else{
    $rand_num_out= $num_to_convert;    
}

echo $rand_num_out;

//global $rand_num_out;
}


                                                      //which is called in //

function obj(){
    
    $obj_height = "100";
    $obj_width = "150";


$obj_directory = "_img/_objects/";
if (glob("$obj_directory*.gif") != false)
{
 $obj_filecount = count(glob("$obj_directory*.gif")); 

//rand_uni($obj_filecount);
//global $rand_num_out;


                           //How I am Calling it now, wish I could just call the variable//
 
 echo"<img src=\"" . $obj_directory;
 
 rand_uni($obj_filecount);
 
 echo ".gif\">";


 
}else{echo "no objects found :(";}
                                 
} 

[NogDog]

Generally, you want to return the value of interest from the function.

// a stupid example function
function foo($value)
{
   return $value * 2;
}

echo  foo(3); // outputs "6"