Code Inspection: Case mismatch in method call or class usage

Reports the usages of functions, methods, classes, and namespaces that do not match the case used in their declarations.

In PHP, class names as well as function/method names are case-insensitive, but it is considered good practice to them functions as they appear in their declaration. In the following example, the function that is defined as exampleFunction is called as ExampleFunction, which is discouraged.