define similar_text() param-out

Author: staabm

stubs/core.stub

@@ -74,6 +74,9 @@ function bin2hex(string $string): string {}
  */
 function parse_str(string $string, array &$result): void {}
 
+/** @param-out float $percent */
+function similar_text(string $string1, string $string2, float &$percent = null) : int {}
+
 /**
  * @template T
  * @template TArray as array<T>

tests/PHPStan/Analyser/data/param-out.php

@@ -320,3 +320,9 @@ function testParseStr() {
 
 	\PHPStan\Testing\assertType('array<int|string, list<string>|string>', $output);
 }
+
+function fooSimilar() {
+	$similar = similar_text('foo', 'bar', $percent);
+	assertType('int', $similar);
+	assertType('float', $percent);
+}