PHP 7.0 - split function

[stodorovic]

Hi,

We just checked our website with WP Engine PHP Compatibility Checker ( https://wordpress.org/plugins/php-compatibility-checker/ ). It uses squizlabs/php_codesniffer, wimg/php-compatibility,... for checkings.

We found these lines:

FILE: .../wp-content/plugins/paypal-for-woocommerce/classes/lib/CentinelClient.php
122 | ERROR | The use of function split is discouraged from PHP version 5.3 and forbidden from PHP version 7.0; use preg_split instead
123 | ERROR | The use of function split is discouraged from PHP version 5.3 and forbidden from PHP version 7.0; use preg_split instead
135 | ERROR | The use of function split is discouraged from PHP version 5.3 and forbidden from PHP version 7.0; use preg_split instead

http://php.net/manual/en/function.split.php
http://php.net/manual/en/function.explode.php
So, the simplest (and best) solution is replace split with explode.

I created pull request #551

Sasa