PHP 7 compatible ?

I’m planning to migrate to PHP 5.* (officially not supported anymore) to PHP 7.

I usedWP Engine PHP Compatibility Checker to check what plugin and template are compatible and I had those warnings:

FILE: /home/mysite/www/wp-content/plugins/post-to-instagram/api/index.php
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FOUND 6 ERRORS AFFECTING 1 LINE
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1 | ERROR | Function name, class name, namespace name or constant name can not be reserved keyword ‘__dir__’ (since PHP version 5.3)
1 | ERROR | Function name, class name, namespace name or constant name can not be reserved keyword ‘__dir__’ (since PHP version 5.3)
1 | ERROR | Extension ‘yp’ is removed since PHP 5.1
1 | ERROR | Extension ‘yp’ is removed since PHP 5.1
1 | ERROR | Extension ‘yp’ is removed since PHP 5.1
1 | ERROR | Extension ‘yp’ is removed since PHP 5.1
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Any experience with WP and Woocommerce with PHP 7?