[soumikmahato]

PHP is already in mature stage, it has integrated support for many libraries like MySQLi, PDO, curl etc.

A huge community is also a major plus point.

And the foremost point is because of WordPress which run on PHP, it's empowers 62.8% of the web including big sites like Tech Crunch.

Third and more practical one is because of old conservative developers who are very resistant to change.

Also it is supported by many web hosting provider by default, due to its availability and integration with cpanel and WHMCS. Thus many personal blog owner prefer php.