string type cast for trim()

Author: codemasher

src/HeaderUtil.php

@@ -103,7 +103,7 @@ public static function normalize(iterable $headers):array{
 	public static function trimValues(iterable $values):iterable{
 
 		foreach($values as &$value){
-			$value = trim($value, " \t");
+			$value = trim((string)($value ?? ''), " \t");
 		}
 
 		return $values;

tests/HeaderUtilTest.php

@@ -113,4 +113,8 @@ public function testNormalizeHeaderName(string $name, string $expected):void{
 		$this::assertSame($expected, HeaderUtil::normalizeHeaderName($name));
 	}
 
+	public function testTrimValues():void{
+		$this::assertSame(['69', '420'], HeaderUtil::trimValues([69, '	420 ']));
+	}
+
 }