> That article is not obsolete just because it's 12 years old. Honestly, in PHP's case, there's not much you can say about it 12 years ago that isn't still true.
The very first specific thing mentioned in the article is "mysql_real_escape_string".
The mysql_ extension was deprecated in PHP 5.5.0 (released on 20 June 2013) and fully removed in PHP 7.0.0 (released on 3 December 2015).
The very first specific thing mentioned in the article is "mysql_real_escape_string".
The mysql_ extension was deprecated in PHP 5.5.0 (released on 20 June 2013) and fully removed in PHP 7.0.0 (released on 3 December 2015).