exec('Cannot assign to undefined variable', 'assign-op-undefined-var.php'); } public function testConcatToArray() { $this->exec('Cannot concat string to array', 'assign-op-concat-array.php'); } public function testBigIntPreInc() { $this->exec('Cannot use ++ on php::BigInt', 'bigint-pre-inc.php'); } public function testBigIntPostInc() { $this->exec('Cannot use ++ on php::BigInt', 'bigint-post-inc.php'); } public function testDecimalPreDec() { $this->exec('Cannot use -- on php::Decimal', 'decimal-pre-dec.php'); } }