Warning: ocilogon() [function.ocilogon]: OCIEnvNlsCreate() failed. There is something wrong with your system - please check that LD_LIBRARY_PATH includes the directory with Oracle Instant Client libraries in/Library/WebServer/Documents/oracle.php on line 25 Oracle Connect Error
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putenv("LD_LIBRARY_PATH=/opt/oracle/instanceclient");
I'd guess you probably need this in apache's start up script, not in php (where that is on a mac setup I have no idea).
You could also try it in your virtual host:
http://httpd.apache.org/docs/2.2/mod/mod_env.html#setenv
SetEnv LD_LIBRARY_PATH /opt/oracle/instanceclient
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