I'm migrating a Wordpress site from one server another and I've run to to a problem with some of the images not being displayed. The images are being piped though a PHP script to dynamically resize them. After some investigation I've noticed that the issue is only effecting PNG images and found errors relating to gd-png in the webserver logs. As a test I created a simple php script (at the bottom of this post) which just opens a PNG with imagecreatefrompng and every time access the script via a browser I get the following errors...
I have tried several different png's from several different sources in case the png's where the problem, but alias it seems to effect all png's regardless of origin.
Most interestingly, if I run the same script from the command line (su'd to the webserver user!) I do not get the errors (I get the raw PNG but that's expected).
I'm not sure if that makes it a PHP problem or an apache24 problem, but I can't think of any reason why running the script via the webserver should cause such a problem. No permission issues are in play.
I have two webservers setup very similar, both experience the same problem.
My apologies if this is not the correct place to report such a problem. I have also posted this problem to PHP's Bug Tracking System (https://bugs.php.net/bug.php?id=70276) but I'm not 100% sure its a PHP problem (because it works via the CLI).
Note, I spent quite a few hours on this yesterday evening and was running PHP 5.6.11 at the time but I have this morning upgraded to 5.6.12 , however the problem persists.
Any advice gratefully received!
Regards
Steve
Test script:
Code:
PHP Warning: imagecreatefrompng(): gd-png: fatal libpng error: bad parameters to zlib in .../test.php on line 10
Code:
PHP Warning: imagecreatefrompng(): gd-png error: setjmp returns error condition in .../test.php on line 10
Code:
PHP Warning: imagecreatefrompng(): 'test.png' is not a valid PNG file in .../test.php on line 10I have tried several different png's from several different sources in case the png's where the problem, but alias it seems to effect all png's regardless of origin.
Most interestingly, if I run the same script from the command line (su'd to the webserver user!) I do not get the errors (I get the raw PNG but that's expected).
I'm not sure if that makes it a PHP problem or an apache24 problem, but I can't think of any reason why running the script via the webserver should cause such a problem. No permission issues are in play.
I have two webservers setup very similar, both experience the same problem.
My apologies if this is not the correct place to report such a problem. I have also posted this problem to PHP's Bug Tracking System (https://bugs.php.net/bug.php?id=70276) but I'm not 100% sure its a PHP problem (because it works via the CLI).
Note, I spent quite a few hours on this yesterday evening and was running PHP 5.6.11 at the time but I have this morning upgraded to 5.6.12 , however the problem persists.
Any advice gratefully received!
Regards
Steve
# uname -a
Code:
FreeBSD indigo 10.0-RELEASE-p17 FreeBSD 10.0-RELEASE-p17 #0: Tue Jan 27 13:45:18 UTC 2015 # httpd -V
Code:
Server version: Apache/2.4.16 (FreeBSD)
Server built: Aug 14 2015 23:52:56
Server's Module Magic Number: 20120211:47
Server loaded: APR 1.5.2, APR-UTIL 1.5.4
Compiled using: APR 1.5.2, APR-UTIL 1.5.4
Architecture: 64-bit
Server MPM: prefork
threaded: no
forked: yes (variable process count)
Server compiled with....
-D APR_HAS_SENDFILE
-D APR_HAS_MMAP
-D APR_HAVE_IPV6 (IPv4-mapped addresses disabled)
-D APR_USE_FLOCK_SERIALIZE
-D APR_USE_PTHREAD_SERIALIZE
-D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
-D APR_HAS_OTHER_CHILD
-D AP_HAVE_RELIABLE_PIPED_LOGS
-D DYNAMIC_MODULE_LIMIT=256
-D HTTPD_ROOT="/usr/local"
-D SUEXEC_BIN="/usr/local/bin/suexec"
-D DEFAULT_PIDLOG="/var/run/httpd.pid"
-D DEFAULT_SCOREBOARD="/var/run/apache_runtime_status"
-D DEFAULT_ERRORLOG="/var/log/httpd-error.log"
-D AP_TYPES_CONFIG_FILE="etc/apache24/mime.types"
-D SERVER_CONFIG_FILE="etc/apache24/httpd.conf" # php -i
Code:
phpinfo()
PHP Version => 5.6.12
System => FreeBSD indigo 10.0-RELEASE-p17 FreeBSD 10.0-RELEASE-p17 #0: Tue Jan 27 13:45:18 UTC 2015 root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC amd64
Build Date => Aug 15 2015 12:38:40
Configure Command => './configure' '--with-layout=GNU' '--localstatedir=/var' '--with-config-file-scan-dir=/usr/local/etc/php' '--disable-all' '--enable-libxml' '--enable-mysqlnd' '--with-libxml-dir=/usr/local' '--with-pcre-regex=/usr/local' '--with-zlib-dir=/usr' '--program-prefix=' '--enable-fpm' '--with-fpm-user=www' '--with-fpm-group=www' '--with-regex=php' '--with-zend-vm=CALL' '--prefix=/usr/local' '--mandir=/usr/local/man' '--infodir=/usr/local/info/' '--build=amd64-portbld-freebsd10.0' 'build_alias=amd64-portbld-freebsd10.0' 'CC=cc' 'CFLAGS=-O2 '-pipe' '-fstack-protector' '-fno-strict-aliasing'' 'LDFLAGS= '-fstack-protector'' 'LIBS=-lpthread' 'CPPFLAGS=' 'CPP=cpp' 'CXX=c++' 'CXXFLAGS=-O2 '-pipe' '-fstack-protector' '-fno-strict-aliasing''
Server API => Command Line Interface
Virtual Directory Support => disabled
Configuration File (php.ini) Path => /usr/local/etc
Loaded Configuration File => /usr/local/etc/php.ini
Scan this dir for additional .ini files => /usr/local/etc/php
Additional .ini files parsed => /usr/local/etc/php/extensions.ini
PHP API => 20131106
PHP Extension => 20131226
Zend Extension => 220131226
Zend Extension Build => API220131226,NTS
PHP Extension Build => API20131226,NTS
Debug Build => no
Thread Safety => disabled
Zend Signal Handling => disabled
Zend Memory Manager => enabled
Zend Multibyte Support => provided by mbstring
IPv6 Support => enabled
DTrace Support => disabled
Registered PHP Streams => compress.bzip2, php, file, glob, data, http, ftp, https, ftps, compress.zlib, zip, phar
Registered Stream Socket Transports => tcp, udp, unix, udg, ssl, sslv3, sslv2, tls, tlsv1.0, tlsv1.1, tlsv1.2
Registered Stream Filters => bzip2.*, string.rot13, string.toupper, string.tolower, string.strip_tags, convert.*, consumed, dechunk, convert.iconv.*, mcrypt.*, mdecrypt.*, zlib.*
...
...
...
gd
GD Support => enabled
GD Version => bundled (2.1.0 compatible)
FreeType Support => enabled
FreeType Linkage => with freetype
FreeType Version => 2.6.0
T1Lib Support => enabled
GIF Read Support => enabled
GIF Create Support => enabled
JPEG Support => enabled
libJPEG Version => 8
PNG Support => enabled
libPNG Version => 1.6.17
WBMP Support => enabled
XPM Support => enabled
libXpm Version => 30411
XBM Support => enabled
JIS-mapped Japanese Font Support => enabled
...
...
...
zlib
ZLib Support => enabled
Stream Wrapper => compress.zlib://
Stream Filter => zlib.inflate, zlib.deflate
Compiled Version => 1.2.8
Linked Version => 1.2.8Test script:
Code:
<?php
ini_set('display_errors',1);
ini_set('display_startup_errors',1);
error_reporting(-1);
function LoadPNG($imgname)
{
/* Attempt to open */
$im = imagecreatefrompng($imgname);
/* See if it failed */
if(!$im)
{ // create error image
$im = imagecreatetruecolor(1500, 30);
$bgc = imagecolorallocate($im, 255, 255, 255);
$tc = imagecolorallocate($im, 0, 0, 0);
imagefilledrectangle($im, 0, 0, 1500, 30, $bgc);
imagestring($im, 1, 5, 5, 'Error loading ' . $imgname, $tc);
}
return $im;
}
header('Content-Type: image/png');
$img = LoadPNG('test.png');
imagepng($img);
imagedestroy($img);
?>
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