evaluating variable in different statement

Sorry I love to figure out things for myself but need some beginner direction.
I'm trying to use _GET to pass a variable to php and modify a Java applet configuration file.
<?php
$symbol = $_GET['symbol'];
$text1 = @file_get_contents("ondemand.txt") or die("file not found!");
print "$symbol";
print "$text1";

The portion of ondemand.txt I'm trying to modify
<param name="symbol" value = "$symbol">

it evaluates the variable in print "$symbol"; but not in
<param name="symbol" value = "$symbol">

Help Please

 

If i understand you correctly, this should be what you need:

<?php
error_reporting(E_ALL);
$symbol = $_GET['symbol'];

$text1 = file_get_contents("ondemand.txt") or die("file not found!");

$text1 = preg_replace("@<param name=\"symbol\" value = \"(.*)\">@", "<param name=\"symbol\" value = \"$symbol\">", $text1);

echo $text1;

?>

PHP:

 

Wow thanks you're good

I'll study what you did thanks again.