Add BOM removal string util

Author: rozsival

src/Utils/Strings.php

@@ -95,6 +95,11 @@ public static function removeBlankLines(string $s): string
 		return self::replace($s, "/(^[\r\n]*|[\r\n]+)[\s\t]*[\r\n]+/", "\n");
 	}
 
+	public static function removeBOM(string $s): string
+	{
+		return self::replace($s, "#\xEF\xBB\xBF#", '');
+	}
+
 	public static function removeEmoji(string $s): string
 	{
 		foreach (Encoding::EMOJI_PATTERNS as $pattern) {

tests/UtilsTests/StringsTest.php

@@ -82,6 +82,11 @@ public function testRemoveBlankLines(): void
 		$this->assertEquals("tested\ntext", Strings::removeBlankLines("tested\n \ntext"));
 	}
 
+	public function testRemoveBOM(): void
+	{
+		$this->assertEquals('test', Strings::removeBOM("\xEF\xBB\xBFtest"));
+	}
+
 	public function testRemoveEmoji(): void
 	{
 		$this->assertEquals('text', Strings::removeEmoji('😀🏯text🗺🎵'));