Check phpinfo() is available before using #1256
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Fixes an issue I raised at #1255 Proof of logic at https://3v4l.org/RqrHt I ended up moving more code than discussed in the issue - initially to avoid `$content` being undefined when it came to `preg_match_all()`, but also as it made sense grouping the code that way. Also, initialising `$versions` outside the check, right at the start ensures it's always defined for the `switch` code further down.
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Fixes an issue I raised at #1255
Proof of logic at https://3v4l.org/RqrHt
I ended up moving more code than discussed in the issue - initially to avoid
$contentbeing undefined when it came topreg_match_all(), but also as it made sense grouping the code that way. Also, initialising$versionsoutside the check, right at the start ensures it's always defined for theswitchcode further down.