issue #2 - deny numbers and slashes in first char in variable name

node/expr/t_function_call_test.go

@@ -4,11 +4,14 @@ import (
 	"bytes"
 	"testing"
 
+	"github.com/z7zmey/php-parser/node/scalar"
+
 	"github.com/z7zmey/php-parser/node/name"
 
 	"github.com/z7zmey/php-parser/node/expr"
 
 	"github.com/z7zmey/php-parser/node"
+	"github.com/z7zmey/php-parser/node/expr/binary"
 	"github.com/z7zmey/php-parser/node/stmt"
 	"github.com/z7zmey/php-parser/php5"
 	"github.com/z7zmey/php-parser/php7"
@@ -125,3 +128,37 @@ func TestFunctionCallVar(t *testing.T) {
 	actual, _, _ = php5.Parse(bytes.NewBufferString(src), "test.php")
 	assertEqual(t, expected, actual)
 }
+
+func TestFunctionCallExprArg(t *testing.T) {
+	src := `<? ceil($foo/3);`
+
+	expected := &stmt.StmtList{
+		Stmts: []node.Node{
+			&stmt.Expression{
+				Expr: &expr.FunctionCall{
+					Function: &name.Name{
+						Parts: []node.Node{
+							&name.NamePart{Value: "ceil"},
+						},
+					},
+					Arguments: []node.Node{
+						&node.Argument{
+							Variadic:    false,
+							IsReference: false,
+							Expr: &binary.Div{
+								Left:  &expr.Variable{VarName: &node.Identifier{Value: "foo"}},
+								Right: &scalar.Lnumber{Value: "3"},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	actual, _, _ := php7.Parse(bytes.NewBufferString(src), "test.php")
+	assertEqual(t, expected, actual)
+
+	actual, _, _ = php5.Parse(bytes.NewBufferString(src), "test.php")
+	assertEqual(t, expected, actual)
+}