better model name for php

modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/PhpClientCodegen.java

@@ -358,6 +358,9 @@ public class PhpClientCodegen extends DefaultCodegen implements CodegenConfig {
 
     @Override
     public String toModelName(String name) {
+        // remove [ 
+        name = name.replaceAll("\\]", "");
+
         // Note: backslash ("\\") is allowed for e.g. "\\DateTime"
         name = name.replaceAll("[^\\w\\\\]+", "_"); // FIXME: a parameter should not be assigned. Also declare the methods parameters as 'final'.