how to change the scope of variables?

Anon

I have created a php script, butI found that the scope variables in functions are limited to the function itself. But I don't know how to use declear global variables in php.
Please see the following code and test it.

<?php

#file name: tester.php

function input (){
?>
<head><title>enter var for testing</title></head>
<body>
<form action ="tester.php" method="get">
this program add 2 numbers<br>
Please enter a number, 1-4 for var1<br>
<input type="text" size="2" name="var1"><br>
Please enter a number, 0-10 for var2<br>
<input type="text" size="2" name="var2"><br>
<input type="submit">
</form></body>
<?php
}

if (isset ($var1)){
print ("the variables you entered are: $var1 and $var2 <br>");
cal($var1, $var2);
print ("the result is $result");
}
else{
input();
}
?>

Anon

INSIDE of your function:

function functioname(){
globale $varname1;
globale $varname2;

[the rest of your function script]

}

kparker

Instead of writing to a global variable inside the function, why not return the value instead?

   function cal ($var1, $var2)
   {
   if ( $var &bt;= 1 && $var1 &lt= 4 )
      $result = $var2 + $var1;
   else
      $result = " var1 not in range";

   return $result;
   }

Note I've simplified the logic somewhat at the same time. Now you can use it like this:

   $result = cal($var1, $var2);
   print ("the result is $result");

or even better, get rid of $result and just print the return value directly (unless you need it for further computation):

   print ("the result is " . cal($var1, $var2) );

kparker

The first line of the function should read:

if ( $var >= 1 && $var1 <= 4 )

Sorry for the confusion.