This is exactly the attitude that the author is taking issue with.
Many inexperienced developers use PHP and make a mess. But try to remember that there are also many brilliant engineers at Facebook and other companies using PHP and doing amazing things with it.
By valid reasons, I mean other than the developers, read the link in my post.
You may also appreciate this viewpoint: https://blog.codinghorror.com/php-sucks-but-it-doesnt-matter...
As for the people using the language, I have inherited a few PHP projects, and without exception, they are a mess. The code quality and readability is usually garbage, simple stuff like tabbing and consistent variable names. SQL Injection vulnerabilities, and XSS issues abound.