terah / fluent-assert

     * @return Assert

     * @throws AssertionFailedException

     */

    public function startsWith($needle, $message = null, $fieldName = null, $encoding = 'utf8')

    {

        if ( $this->doAllOrNullOr(__FUNCTION__, func_get_args()) )

        {

            return $this;

        }

        $this->string($message, $fieldName);

        if ( mb_strpos($this->value, $needle, null, $encoding) !== 0 )

        {

            $message = $message ?: $this->overrideError;

            $message     = sprintf(

                $message ?: 'Value "%s" does not start with "%s".',

                $this->stringify($this->value),

                $this->stringify($needle)

            );

            $constraints = ['needle' => $needle, 'encoding' => $encoding];

            throw $this->createException($message, $this->overrideCode ?: self::INVALID_STRING_START, $fieldName, $constraints);

        }

        return $this;

    }

    /**

     * Assert that value ends with a sequence of chars.

     * @return Assert

     * @throws AssertionFailedException

     */

    public function contains($needle, $message = null, $fieldName = null, $encoding = 'utf8')

    {

        if ( $this->doAllOrNullOr(__FUNCTION__, func_get_args()) )

        {

            return $this;

        }

        $this->string($message, $fieldName);

        if ( mb_strpos($this->value, $needle, null, $encoding) === false )

        {

            $message = $message ?: $this->overrideError;

            $message     = sprintf(

                $message ?: 'Value "%s" does not contain "%s".',

                $this->stringify($this->value),

                $this->stringify($needle)

            );

            $constraints = ['needle' => $needle, 'encoding' => $encoding];

            throw $this->createException($message, $this->overrideCode ?: self::INVALID_STRING_CONTAINS, $fieldName, $constraints);

        }

        return $this;

    }

    /**

     * Assert that value is in an array of choices.