A Variable Losing its value? Are they losing scope maybe?

[mhoctober]

Sorry guys - this is a tricky one to explain!

Basically I am trying to use a value from a form submitted on a previous page to form part of a file name. Everything is workig fine - files are uploaoding and remaning - however the value in the $frmTransNum variable is getting wiped for some reason....anyone any ideas?

<?php

//get the transaction number from the previous form submit...
$transNum=$frmTransNum;

//these two lines echo both values to the screen succesfully..
echo $frmTransNum. "<br>";
echo $transNum. "<br>";

/***********************************************
* Snippet Name : File Uploader *
* Scripted By : Hermawan Haryanto *
* License : GPL (General Public License) *
***********************************************/
$numoffile = 4;
// Fix path of your file to be uploaded, don't forget to CHMOD 777 to this folder
$file_dir = "/home/#*$!/public_html/files/";
if ($_POST) {

for ($i=0;$i<$numoffile;$i++) {

if (trim($_FILES['myfiles']['name'][$i])!="") {

$newFile = $file_dir.$_FILES['myfiles']['name'][$i];

//attempting here to use the value in the $transNum variable to prefix the file name...
$revisedFileName=$transNum."(".$i.")".$_FILES['myfiles']['name'][$i];

//the values in both $frmTransNum and $transNum dont echo out to the screen here and appear to have been wiped!
echo "frmTransNum = ".$frmTransNum;
echo "TransNum =". $transNum;

// a few echos just for goo measure!
echo "<br>";
echo "1=".$_FILES['myfiles']['name'][$i];
echo "2=".$file_dir.$_FILES['myfiles']['name'][$i];
echo "3=".$newFile;
echo "4=".$revisedFileName;

move_uploaded_file($_FILES['myfiles']['tmp_name'][$i], $newFile);
echo "File " .$i. "Uploaded";

rename($newFile, $file_dir.$revisedFileName);

$j++;
}
}
}

if (isset($j)&&$j>0) print "Your file(s) has been uploaded.<br>";

print "<form method='post' enctype='multipart/form-data'>";
for($i=0;$i<$numoffile;$i++) {
print "<input type='file' name='myfiles[]' size='30'><br>";
}
print "<input type='submit' name='action' method=POST value='Upload'>";
print "</form>";
$transNum=$frmTransNum;

?>

[edited by: jatar_k at 5:39 pm (utc) on Jan. 27, 2006]
[edit reason] no urls thanks [/edit]

[ramoneguru]

Hmmm, that call to trim() in your if statement may not give you the results you're looking for if your just testing for an empty string. Set the return value from trim() equal to a temp variable, then check to see if its empty like so:

$temp = trim($_FILES['myfiles']['name'][$i]);

if (!(empty($temp)) ) {
//do whatever,
}

I would venture to guess the statements inside that 'if' aren't even being executed.....The variables shouldn't be out of scope. Well, give it a go and let us know.

--Nick