Symfony Polyfill / Php70

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This component provides features unavailable in releases prior to PHP 7.0:

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- [`intdiv`](https://php.net/intdiv)

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- [`preg_replace_callback_array`](https://php.net/preg_replace_callback_array)

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- [`error_clear_last`](https://php.net/error_clear_last)

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- `random_bytes` and `random_int` (from [paragonie/random_compat](https://github.com/paragonie/random_compat))

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- [`*Error` throwable classes](https://php.net/Error)

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- [`PHP_INT_MIN`](https://php.net/reserved.constants#constant.php-int-min)

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- `SessionUpdateTimestampHandlerInterface`

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More information can be found in the

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[main Polyfill README](https://github.com/symfony/polyfill/blob/master/README.md).

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Compatibility notes

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===================

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To write portable code between PHP5 and PHP7, some care must be taken:

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- `\*Error` exceptions must be caught before `\Exception`;

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- after calling `error_clear_last()`, the result of `$e = error_get_last()` must be

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verified using `isset($e['message'][0])` instead of `null !== $e`.

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License

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=======

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This library is released under the [MIT license](LICENSE).

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