Perhaps for some this is obvious, but not originally for me: if you still see this error The specified procedure could not be found. in Unknown on line 0 The specified procedure could not be found. in Unknown on line 0 , even after installing the instant client, SDK, etc., make sure you put the Oracle instant client in the system variable "PATH" and not the user variable, since the user is not used explicitly when Apache is running. You can verify that the path to the client client is set correctly by looking at the PATH value indicated on your phpinfo () output.
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