PHP image handling/resizing

benrose111488 · 07-06-2005, 11:06 PM

hello... I'm writing a PHP script that needs to take an image and trash the quality level until the filesize is 512k or less

I've written the following code:

PHP Code:



$fileContent = imap_base64(imap_fetchbody($mbox,$msgno,'2')); 
$newfilename=get_new_filename($suffix, 0); 
while(file_exists($newfilename)) 
{$newfilename=get_new_filename($suffix, 0);} 
$newfilenametemp=get_new_filename($suffix, 1); 
while(file_exists($newfilenametemp)) 
{$newfilenametemp=get_new_filename($suffix, 1);} 
$fdtemp = fopen($newfilenametemp, 'w'); 
fwrite($fdtemp, $fileContent); 
fclose($fdtemp); 
$fd = fopen($newfilename, 'w'); 
imagejpeg($newfilenametemp, $fd, 75); 
fclose($fd); 
 
function get_new_filename($suffix, $temp) 
{ 
srand(time()); 
$random = (rand()%999999999999999999); 
if($temp == "0") 
{$newfilename = "/home/scavenger/scavengerxhunt.com/subimgdir/" . $random . "" . $suffix;} 
elseif($temp == "1") 
{$newfilename = "/home/scavenger/scavengerxhunt.com/subimgdir/" . $random . "temp" . $suffix;} 
return $newfilename; 
}

however, this code always leads to the following error:
Warning: imagejpeg(): supplied argument is not a valid Image resource in /home/.elysium/scavenger/scavengerxhunt.com/getmail.php on line 105

apparently the image itself on the server isn't a valid resource

any ideas what's going wrong? I've heard of using imagecreatetruecolor() but I have no idea how or why to use it

please assist...

keefaz · 07-07-2005, 02:00 AM

imagejpeg is defined as :

PHP Code:



bool imagejpeg ( resource image [, string filename [, int quality]] )

So try replace :

PHP Code:



$fd = fopen($newfilename, 'w'); 
imagejpeg($newfilenametemp, $fd, 75); 
fclose($fd);

with :

PHP Code:



$im = imagecreatefromstring ($fileContent); 
imagejpeg($im, $newfilenametemp, 75); 
imageDestroy($im);

[edit]
Or write content directly as you did with $fdtemp

PHP Code:



$fd = fopen($newfilename, 'w'); 
fwrite($fd, $fileContent); 
fclose($fd);