Omnipay\Alipay\Common\Signer::signWithMD5 PHP Метод

    public function signWithMD5($key)
    {
        $content = $this->getContentToSign();
        return md5($content . $key);
    }

 public function testIgnore()
 {
     $this->assertSame(['sign', 'sign_type'], (new Signer())->getIgnores());
     $params1 = ['aaa' => '111', 'bbb' => '2222', 'ccc' => '3333', 'apple' => 'jobs'];
     $params2 = ['bbb' => '2222', 'ccc' => '3333', 'aaa' => '111'];
     $signer = new Signer($params1);
     $signer->setIgnores(['apple']);
     $sign1 = $signer->signWithMD5($this->key);
     $signer = new Signer($params2);
     $signer->setIgnores(['apple']);
     $sign2 = $signer->signWithMD5($this->key);
     $this->assertEquals($sign1, $sign2);
     $signer = new Signer($params1);
     $signer->setIgnores([]);
     $sign3 = $signer->signWithMD5($this->key);
     $this->assertNotEquals($sign1, $sign3);
 }