Binary to Image

<?php
$fileName = $_FILES['file']['tmp_name'];
$fileSize = $_FILES['file']['size'];
$file = fopen($fileName, "r");
$data = fread($file,$fileSize);
$data2 = base64_decode($data);
$data3 = base64_decode($data2);
$image = imagecreatefromstring($data3);
if ($image !== false)
{
header("Content-type: image/jpg");
imagejpg($image);
imagedestroy($image);
}
else
{
echo "There Was An Error While Converting!";
}
?>

Code (markup):

Can someone tell me if I wrote this script right?

 

I have a C++ script here does someone know how to do this in PHP?

unsigned int lzDec(unsigned int DecLen,
unsigned char *Src, unsigned char *Dst) {
unsigned int sOff = 0, dOff = 0, Temp, Dist;
unsigned char cHdr, Bit, BitVal, Leng;
while (dOff < DecLen) {
cHdr = Src[sOff]; sOff++;
for (Bit = 0; Bit < 8; Bit++) {
BitVal = (cHdr >> (7 - Bit)) & 1;
if (BitVal == 0) {
Dst[dOff] = Src[sOff];
sOff++; dOff++;
} else {
Temp = Src[sOff] | (Src[sOff + 1] << 8);
Dist = Temp & 0x7FF;
Leng = (Temp >> 11) + 3;
sOff += 2;
if (Dist > dOff || Dist == 0) return 0;
for (Temp = 0; Temp < Leng; Temp++) {
Dst[dOff] = Dst[dOff - Dist];
dOff++; if (dOff == DecLen) break;
}
}
if (dOff == DecLen) break;
}
} 
return sOff;
}

Code (markup):

 

Thanks it's work

 

What works?