Google’s Safe Browsing diagnostics for PHP.net suggest that malware has been present on the site in the last 90 days. Chrome and Firefox are currently flagging the site as “suspicious” and contains malware that can harm your computer. The obfuscated JavaScript “userprefs.js” inserts a hidden iframe into the webpage, which loads content from an external site known for distributing malware. The issue seems that the issue has been resolved by admins and PHP is back as a normal clean website, after removing malicious scripts.
Source: https://thehackernews.com/2013/10/google-detected-malware-on-phpnet.html