Python is a better language. Encourages better code and is general purpose.

Other:
PHP is the de-facto language for the web: Majority of the popular web frameworks (Wordpress, Drupal, Joomla, Zend, CodeIgniter, OSCommerce) are built on PHP. Which also makes it very easy to find a web developer who knows PHP.

Python has Django a high-level Python Web framework that encourages rapid development and clean, pragmatic design.

There are database access layer limitations in Python.
The PHP Data Objects (PDO) extension defines a lightweight, consistent interface for accessing databases in PHP. See:
PHP vs Ruby vs Python: Unbiased Comparison in 2016 |
10 Reasons Why Python Scores Over PHP for Web Development |

• Forgiving: PHP is one of the most 'freeform' languages I have used, probably comparable only to Javascript.
• Easier learning curve: You can quickly start coding in PHP with a basic understanding or experience of programming. This was the main purpose PHP was created to serve. This also helps in faster development.
• Hobbyist-compliant: The code doesn't need to be elegant for it to work. I think this is the biggest reason for it to have become the most popular web development language. You can cook up some code in a hurry, and it works.
• Open source and communities: There is a huge community and open source projects that use PHP. Makes it easy to get support if you run into a roadblock.
• De-facto language for the web: Majority of the popular web frameworks (Wordpress, Drupal, Joomla, Zend, CodeIgniter, OSCommerce) are built on PHP. Which also makes it very easy to find a web developer who knows PHP.
• Hosting support: Because of popularity, PHP hosting is supported by almost every provider out there.
• PHP 5 is actually a huge improvement over the versions before in terms of language design etc.
• PHP has Kohana, Symfony, Codeigniter and Zend frameworks for web development.

• Syntax and standard library: I LOVE the readability of Python syntax. The standard Python library ships with a great set of tools and utilities.
• General purpose: Python can be run on the servers, to build applications and in many other places.
  
• Elegant: Python has an elegant language design which makes it much easier to write great code.
  
• Unicode support: Python has great support for Unicode.
  
• Modular and definitive: Python is less quirky compared to PHP.
  
• Python has Django a high-level Python Web framework that encourages rapid development and clean, pragmatic design.

.Source: Bhashkar Sharma at (7) Which is better, PHP or Python? Why? - Quora

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