Google results for PHP tutorials contain SQL injection vulnerabilities
I omitted unrelated articles or ones behind a paywall. All parameters in SQL queries are escaped categorically. Incoming data is only escaped where absolutely necessary. Author attempted some escaping but vulnerability found. There are of course more issues to be found across all 30 results, this is just the result of me quickly skimming them all specifically for sql injection. Main takeaway for me personally is the dreadful quality of the majority of Google's search results. Several of these results were, simply put, SEO-optimized baloney.