[RESOLVED] Image dimensions from zip_open

[jdc44]

Greetings all-
I'm using php's zip_open() functions to parse through a zip file of images. I need to get the width and height of each image in the zip file. I'm having problems doing this.

I'm able to loop through the zip file and get each image and upload it to an Oracle database table. But, when adding in code to get an image size, I can't get anything to work.

My code, in part is below, so you can see what I have as far as file names.

Any help would be appreciated.

# code in part
# $zipfile_path_name is temp dir where uploaded zip is stored temporarily

$zip = zip_open(realpath($zipfile_path_name));
while( $zip_entry = zip_read($zip) ){
   $zip_name = zip_entry_name($zip_entry);
   $image_file_size = zip_entry_filesize($zip_entry);
   if( preg_match('/(\.jpg)|(\.jpeg)|(\.gif)/', $zip_name) ){
      $file=null;
      if( zip_entry_open($zip, $zip_entry) ){
         $file = zip_entry_read($zip_entry, $image_file_size);
         zip_entry_close($zip_entry);

     // my other processing code is here...

  }
   }
}

Regards,

[scrupul0us]

when you say size do you mean dimensions (w & h)? If so check this out:

http://us.php.net/getimagesize

If you just need the size of the file itself (in bytes):

http://us.php.net/manual/en/function.filesize.php

[jdc44]

Thanks, I did mean width and height, sorry for the confusion.

getimagesize() doesn't work for me. I get an error with it.

# code in part
# $zipfile_path_name is temp dir where uploaded zip is stored temporarily

$zip = zip_open(realpath($zipfile_path_name));
while( $zip_entry = zip_read($zip) ){
   $zip_name = zip_entry_name($zip_entry);
   $image_file_size = zip_entry_filesize($zip_entry);
   if( preg_match('/(\.jpg)|(\.jpeg)|(\.gif)/', $zip_name) ){
      $file=null;
      if( zip_entry_open($zip, $zip_entry) ){
         $file = zip_entry_read($zip_entry, $image_file_size);
         zip_entry_close($zip_entry);

     if($size = getimagesize($file)){
         if(is_array($size)){
		$width=$size[0];
		$height=$size[1];
     }
     }


     // my other processing code is here...

  }
   }
} 

Error: Inner exception message: getimagesize(���&#65533😉: failed to open stream: No such file or directory

[scrupul0us]

well you could do this:

<?php
$data = $file;
$data = base64_decode($data);

$im = imagecreatefromstring($data);
$width = imagesx($im);
$height = imagesy($im);
imagedestroy($im);
?>

in place of

         if($size = getimagesize($file)){
             if(is_array($size)){
            $width=$size[0];
            $height=$size[1];
         }
         } 

...i think

[jdc44]

Thanks,
I tried your suggestion, but still get an error.

error: Inner exception message: imagecreatefromstring(): Empty string or invalid image

I can view my images coming out of the database, so I know that $file is an image going into the database (my upload script) for each image.

Thanks for the suggestions. Appreciated.

[scrupul0us]

yeah... hrm... the issue that is that GD expects a physical file to runs those functions and i presume that zip_open simply keeps them in memory and handles accordingly

what happens if you try to 'echo $file;' instead of doing any file size processing? the output might be indicative of what you are dealing with whether its an object/array etc

[jdc44]

I had to create a zip file of one image to keep my web page from timing out and crashing.

var_dump($file) displays as boat load of these characters:

string(274066) "�����JFIF��d�d�����Photoshop 3.0�8BIM�������d�����d����8BIM ��������x8BIM��������������8BIM �������8BIM'����� ��������8BIM������H�/ff��lff�������/ff������������2����Z���������5����-��������8BIM������p������������������������..."

[scrupul0us]

what filetypes are you working with? that looks like it might be a PSD

[jdc44]

I figured it out finally. I was blinded by my own vision.

the function tempnam() needs a temp directory and a "prefix for the filename". I was using the file $file. Doh!

I believe I was trying to get the contents or width and height of the image file before I had actually extracted it from the zip file.

I needed to create the temp directory and file name. Then write my image file to that. Then I could work on the contents of the file.

It works now.

// my image file from the zip file is in $file

 $width = $height = $size = null;
 $tmpfname = tempnam("/tmp", 'imagefile');
$handle = fopen($tmpfname, "w");

fwrite($handle, $file);  // store the image to the temp dir.

$size = getimagesize($tmpfname);
if(is_array($size)){
	print "<br />Width: $size[0] - height: $size[1]";
}
fclose($handle);

Thanks for all the help. It got me to looking closer at it all.

[scrupul0us]

AEWSOME! does it automatically clean up the temp files for you or is there some manual housekeeping todo?