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Error when installing Gallery2

In the process of installing Gallery2 (v 2.0.2), there is a bug in Zend
Optimizer.

Error given:
"Notice: Only variable references should be returned by reference in
$(SOME PATH)" where $(SOME PATH) is the php file that passed a non
reference.

Documentation on the bug:

Gallery specific, with the fix --
http://codex.gallery2.org/index.php/Gallery2:FAQ#I_get_.22Notice:_Only_variable_references_should_be_returned_by_reference_in_.22.2C_what.27s_wrong.3F
Gallery devel discusion -- http://gallery.menalto.com/node/36605#comment-133101
Bug report on php.net -- http://bugs.php.net/bug.php?id=34009


As it mentions on the Gallery forums, the easiest fix is to edit php.ini

In php.ini replace:
zend_optimizer.optimization_level=15
with:
zend_optimizer.optimization_level=14



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