Troubleshooting for “Warning: Illegal offset type in …” in PHP

System Environment:
Red Hat 9.0 + Apache 2.0.52 + PHP 4.3.10 + Zend Optimizer v2.1.0 etc.

• Description:I upgraded PHP 4.3.9 to 4.3.10 and when I opened my sites like phpMyAdmin or Nucleus v2.5 beta, the page led to:
  

  Warning: Illegal offset type in abc.php on line 91
  Warning: Illegal offset type in abc.php on line 108

  After I downgraded PHP to 4.3.9, everything goes well.

• Troubleshooting:I searched PHP Bugs and found some interesting issues:
• Bug #31116 Pear not working after update to 4.3.10
• Bug #30914 foreach returns the wrong value

So I was wondering that the low-version of Zend Optimizer caused the problem.

Upgrading Zend Optimizer to 2.5.7
Please read the Zend Optimizer User Guide first.

# tar -zxvf ZendOptimizer-2\[1\].5.7-linux-glibc21-i386.tar.gz
# cd ZendOptimizer-2.5.7-linux-glibc21-i386
# ./install

The following configuration changes have been made:

- The php.ini file has been relocated from /usr/local/lib to /usr/local/Zend/etc.
- A symbolic link for the php.ini file has been created in /usr/local/lib.
- The original php.ini was backed up to /usr/local/lib/php.ini-zend_optimizer.bak

Some lines updated in php.ini:

[Zend]
zend_optimizer.optimization_level=15
zend_extension_manager.optimizer=/usr/local/Zend/lib/Optimizer-2.5.7
zend_extension_manager.optimizer_ts=/usr/local/Zend/lib/Optimizer_TS-2.5.7
zend_extension=/usr/local/Zend/lib/ZendExtensionManager.so
zend_extension_ts=/usr/local/Zend/lib/ZendExtensionManager_TS.so

Then restart the apache and recombine the PHP 4.3.10 by using configure in my previous setting, and remember to run:
#libtool –finish /root/source/apache2/php-4.3.10/libs