FYI, this was an SELinux issue; I noticed an error in the audit log:
Code:
type=AVC msg=audit(1229925320.287:1721): avc: denied { execute } for pid=21477 comm="httpd" path="/usr/local/Zend/lib/ZendExtensionManager.so" dev=sda2 ino=2615770 scontext=use
r_u

ystem_r:httpd_t

0 tcontext=user_u

bject_r:usr_t

0 tclass=file
The following set of commands resolved the issue:
Code:
setsebool allow_execheap 1
chcon -t httpd_modules_t -u system_u `find /usr/local/Zend/lib/ -name \*.so`
execstack -c `find /usr/local/Zend/lib/ -name \*.so`
Regards,
Jerret
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