From PHP 4 to PHP 5.. PHP Fatal zlib error: imagepng()

Posted on January 3rd, 2007 in code tidbits

Getting this error?

PHP Fatal error: imagepng() [function.imagepng]: gd-png: fatal libpng error: zlib error in example.php on line 10

Fix it easily by changing your compression variable of imagepng, imagegif or imagejpg/imagejpeg into a 1-10 ranged number – instead of the PHP 4 1-100 standard.

It should work smoothly now :)

If you enjoyed this post:

Please take the time to leave a comment with any of your thoughts, follow me on Twitter or subscribe to my RSS Feed for automatic updates on all future posts.

There are 12 responses to this post so far

• 
  Joe wrote:

  It works like heaven. Thank you.

  # September 2nd, 2007 at 1:47pm

• 
  Jatin wrote:

  Yes…the solution works. Had the same problem while migrating from php4 to php5

  Thanks
  jatin

  # September 22nd, 2007 at 4:26am

• 
  vic wrote:

  thanks dude … my code works nicely now!

  # November 24th, 2007 at 8:06am

• 
  fedora_rocks wrote:

  YES! thanks dude!

  # May 14th, 2008 at 7:01am

• 
  David Barnes wrote:

  Actually, 10 causes this error too. Set it to 9 to fix this problem.

  # August 21st, 2008 at 7:31pm

• 
  Blake wrote:

  Hey Jamie, thanks for taking the time to post this. You came up quite high on Google for this error message. Within less than a minute of encountering it in a project I’m working on, I was able to remedy it, thanks to your post.

  Kudos!

  # December 7th, 2008 at 5:59am

• 
  RaYa wrote:

  Hey, thx.. i used 7 and its works fine ^^

  # December 10th, 2008 at 7:49pm

• 
  Pece wrote:

  Works with values 0-9.
  Thanks!

  # June 18th, 2009 at 6:36am

• 
  creed wrote:

  Thanks for the fix! Tried it with 9 (after it not working with 10) and it worked like a charm. Gotta love easy solutions! Thanks again!

  # June 19th, 2009 at 1:03pm

• 
  Vaibhav wrote:

  Thank you so much! This one problem took two days of my life away :/

  # October 26th, 2009 at 8:36pm

• 
  Sham wrote:

  Thank you for posting this, you’re a life saver!

  # October 31st, 2009 at 5:43am

• 
  Warning: imagepng() [function.imagepng]: gd-png: fatal libpng error: zlib error « Leonel Santos wrote:

  [...] I googled this error and browsed through several Websites until I found this explanation: From PHP 4 to PHP 5.. PHP Fatal zlib error: imagepng() [...]

  # January 14th, 2010 at 5:27pm

Need a freelance developer?

Do you need a freelance PHP, Wordpress or Magento developer? Get in touch!