Despite the negativity towards PHP, the Laravel project has managed to bring back the demand for PHP. And it's not going anywhere.
You can find new PHP 7.X branch to be reasonably competitive over Ruby and Python frameworks. You can easily check the performance of PHP SQLite Database Connection Example . Compare this with Ruby and Python frameworks basic code. And see how quick PHP is on that note.
I'd recommend you to ignore the haters and learn PHP. Who knows you may definitely find some value out new changes and improvements that are happening.