Add support for $callable() sytnax with 'Class::method'

Using the $callable() syntax when used with a string of
the form 'Class::method' would error as an undefined
function, even if the string passed is_callable() or the
callable type-hint. The fix adds support for the $callable()
syntax for any string accepted by is_callable() or the
callable type-hint.

Fix bug 68475 test with deprecated notice

Reduced scope of unit test.

Added tests with arguments.

1 files changed, 57 insertions, 0 deletions

diff --git a/Zend/tests/bug68475.phpt b/Zend/tests/bug68475.phpt
new file mode 100644
index 0000000000..351edb2e94
--- /dev/null
+++ b/Zend/tests/bug68475.phpt
@@ -0,0 +1,57 @@
+--TEST--
+Bug #68475 Calling function using $callable() syntax with strings of form 'Class::method'
+--FILE--
+<?php
+class TestClass
+{
+    public static function staticMethod()
+    {
+        echo "Static method called!\n";
+    }
+
+    public static function staticMethodWithArgs($arg1, $arg2, $arg3)
+    {
+        printf("Static method called with args: %s, %s, %s\n", $arg1, $arg2, $arg3);
+    }
+}
+
+// Test basic call using Class::method syntax.
+$callback = 'TestClass::staticMethod';
+$callback();
+
+// Case should not matter.
+$callback = 'testclass::staticmethod';
+$callback();
+
+$args = ['arg1', 'arg2', 'arg3'];
+$callback = 'TestClass::staticMethodWithArgs';
+
+// Test call with args.
+$callback($args[0], $args[1], $args[2]);
+
+// Test call with splat operator.
+$callback(...$args);
+
+// Reference undefined method.
+$callback = 'TestClass::undefinedMethod';
+try {
+    $callback();
+} catch (EngineException $e) {
+    echo $e->getMessage() . "\n";
+}
+
+// Reference undefined class.
+$callback = 'UndefinedClass::testMethod';
+try {
+    $callback();
+} catch (EngineException $e) {
+    echo $e->getMessage() . "\n";
+}
+?>
+--EXPECT--
+Static method called!
+Static method called!
+Static method called with args: arg1, arg2, arg3
+Static method called with args: arg1, arg2, arg3
+Call to undefined method TestClass::undefinedMethod()
+Class 'UndefinedClass' not found