Complete #33605 by adding phpunit tests

htdocs/core/lib/functions.lib.php

@@ -11973,23 +11973,34 @@ function dolExplodeKeepIfQuotes($input)
 	preg_match_all('/"([^"]*)"|\'([^\']*)\'|(\S+)/', $input, $matches);
 
 	// Merge result and delete empty values
-	return array_filter(array_map(
+
+	$result = array_map(
 		/**
-		 * Return first non-empty item, or empty string
-		 *
-		 * @param string $a Possibly empty item - match ""
-		 * @param string $b Possibly empty item - match ''
-		 * @param string $c Non empty string if $a and $b are empty
-		 *
+		 * @param string $a Matched value in double quotes
+		 * @param string $b Matched value in single quotes
+		 * @param string $c Unquoted value
 		 * @return string
 		 */
 		static function ($a, $b, $c) {
-			return $a ?: ($b ?: $c);
+			if ($a !== '') return $a;
+			if ($b !== '') return $b;
+			if ($c !== '') return $c;
+			return '';
 		},
 		$matches[1],
 		$matches[2],
 		$matches[3]
-	));
+	);
+	return array_values(array_filter($result,
+		/**
+		 * Filter out empty strings from the result array.
+		 *
+		 * @param string $val The value to check.
+		 * @return bool True if the value is not an empty string.
+		 */
+		static function ($val) {
+			return $val !== '';
+		}));
 }