For one text book, the export process begins fine, then fails part way through. The PHP logs show the following error getting recorded:
PHP Fatal error: Maximum execution time of 600 seconds exceeded in /data/pressbooks/htdocs/wp-content/plugins/pressbooks-mpdf/symbionts/mpdf/mpdf.php on line 10750
And here’s the corresponding line of code from mpdf.php, lines 10747-10755:
10747 // extract alpha channel
10748 for ($ypx = 0; $ypx < $h; ++$ypx) {
10749 for ($xpx = 0; $xpx < $w; ++$xpx) {
10750 $alpha = (imagecolorat($im, $xpx, $ypx) & 0x7F000000) >> 24;
10751 if ($alpha < 127) {
10752 imagesetpixel($imgalpha, $xpx, $ypx, (255-($alpha * 2)));
10753 }
10754 }
10755 }
I am aiming to explain how it is the php-errors.log file continues to show the “maximum execution time of 600 seconds exceeded” when I am able to point to all the following config settings I have been sure to revise with higher values for timeouts.
php.ini
max_execution_time = 2000
wp-config.php
set_time_limit(2000);
.htaccess
<IfModule mod_php5.c>
php_value max_execution_time 2000
</IfModule>
So, the number “600” doesn’t correlate. In addition, I have downloaded php source files to do global searching for any place a value of “600” is set for a timeout variable (of any kind) and I’m unable to track it down.
If it helps, here is the diagnostic info straight out of PressBooks:
### System Information
#### Book Info
Book ID: 3
Book URL: http://library.open.oregonstate.edu/computationalbiology/
Book Privacy: Public
#### Browser
Platform: Apple
Browser Name: Firefox
Browser Version: 51.0
User Agent String: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:51.0) Gecko/20100101 Firefox/51.0
#### WordPress Configuration
Network URL: http://library.open.oregonstate.edu/
Network Type: Subdirectory
Version: 4.7.1
Language: en_US
WP_ENV: Not set
WP_DEBUG: Disabled
Memory Limit: 64M
#### Pressbooks Configuration
Version: 3.9.6
Book Theme: Pressbooks Custom CSS
Book Theme Version: 0.1
Root Theme: Pressbooks Publisher
Root Theme Version: 3.0.1
#### Pressbooks Dependencies
Epubcheck: Not Installed
Kindlegen: Installed
xmllint: Installed
PrinceXML: Not Installed
Saxon-HE: Not Installed
#### Must-Use Plugins
#### Network Active Plugins
CM Tooltip Glossary: 3.4.4
Pressbooks: 3.9.6
Pressbooks mPDF: 1.0.1
Pressbooks Textbook: 3.0.1
SSH SFTP Updater Support: 0.7.1
Table of Contents Plus: 1601
WP Broken Link Status Checker: 1.0.4
WP QuickLaTeX: 3.8.4
#### Book Active Plugins
#### Inactive Plugins
Akismet: 3.2
#### Server Configuration
PHP Version: 5.4.16
MySQL Version: 5.5.52
Webserver Info: Apache/2.4.6 (CentOS) PHP/5.4.16
#### PHP Configuration
Safe Mode: Disabled
Memory Limit: 1024M
Upload Max Size: 99M
Post Max Size: 99M
Upload Max Filesize: 99M
Time Limit: 2000
Max Input Vars: 1000
URL-aware fopen: On (1)
Display Errors: N/A
#### PHP Extensions
cURL: Supported
cURL Version: 7.29.0
imagick: Not Installed
sass: Not Installed
xsl: Installed