Implement __toString for JsObject

Author: cscott

src/node_php_jsobject_class.cc

@@ -367,6 +367,14 @@ PHP_METHOD(JsObject, __invoke) {
     TRACE("<");
 }
 
+// Implement `__toString` by calling JS `toString` method.
+PHP_METHOD(JsObject, __toString) {
+    // use plain zval to avoid allocating copy of method name
+    zval method; ZVAL_STRINGL(&method, "toString", 8, 0);
+    zval *args = NULL;
+    call_user_function(EG(function_table), &this_ptr, &method,
+                       return_value, 0, &args TSRMLS_CC);
+}
 
 /* Use (slightly thunked) versions of the has/read/write property handlers
  * for dimensions as well, so that $obj['foo'] acts like $obj->foo. */
@@ -499,6 +507,8 @@ ZEND_BEGIN_ARG_INFO_EX(node_php_jsobject_call_args, 0, 1/*return by ref*/, 1)
     ZEND_ARG_INFO(0, member)
     ZEND_ARG_INFO(0, args)
 ZEND_END_ARG_INFO()
+ZEND_BEGIN_ARG_INFO_EX(node_php_jsobject_toString_args, 0, 0, 0)
+ZEND_END_ARG_INFO()
 
 static const zend_function_entry node_php_jsobject_methods[] = {
     PHP_ME(JsObject, __construct, NULL, ZEND_ACC_PUBLIC|ZEND_ACC_CTOR)
@@ -512,6 +522,7 @@ static const zend_function_entry node_php_jsobject_methods[] = {
     PHP_ME(JsObject, __unset, node_php_jsobject_unset_args, ZEND_ACC_PUBLIC|ZEND_ACC_FINAL)
     PHP_ME(JsObject, __call, node_php_jsobject_call_args, ZEND_ACC_PUBLIC|ZEND_ACC_FINAL)
     PHP_ME(JsObject, __invoke, NULL, ZEND_ACC_PUBLIC|ZEND_ACC_FINAL)
+    PHP_ME(JsObject, __toString, node_php_jsobject_toString_args, ZEND_ACC_PUBLIC|ZEND_ACC_FINAL)
     ZEND_FE_END
 };
 

test/context.js

@@ -249,4 +249,29 @@ describe('Passing context object from JS to PHP', function() {
 			);
 		});
 	});
+	it('should implement __toString', function() {
+		var out = new StringStream();
+		var A = function A(v) { this.f = v; };
+		A.prototype.toString = function() { return JSON.stringify(this.f); };
+		var context = { a: new A(32), b: {} };
+		return php.request({
+			source: [
+				"call_user_func(function () {",
+				"  $c = $_SERVER['CONTEXT'];",
+				"  echo 'a is ' . $c->a . '\n';",
+				"  echo 'b is ' . $c->b . '\n';",
+				"  $c->a->f = 'abc';",
+				"  echo 'a is ' . $c->a . '\n';",
+				"})"].join('\n'),
+			stream: out,
+			context: context
+		}).then(function() {
+			out.toString().should.equal([
+				'a is 32',
+				'b is [object Object]',
+				'a is "abc"',
+				''
+			].join('\n'));
+		});
+	});
 });