fix the generate process lost INJECT_INDEX after empty/isset methods

fix: fix the wrong report of the include circle depends

fix: fix nested function calls and mix the array index may cause error

fix: fix the expression in string parse uncorrectly

fix: fix the wrong type transform for equal

fix: fix function parse error caused by the wrong modification of the…

… previous version

tests: add more tests for fet

fix json_encode func,add $fet.debug for debugging data

fix some syntax errors

fix funcs.go convert errors