#7 PHP

PHP is a server-side scripting language designed for web development but also used as a general-purpose programming language. PHP is now installed on more than 244 million websites and 2.1 million web servers. High-speed scripting with caching, augmented compiling code plug-ins is what makes the future of the language. High-profile sites including Facebook, Wikipedia and Wordpress run on PHP.

#6 SQL

SQL is the world's most widely used open source relational database management system that runs as a server providing multi-user access to a number of databases. The SQL phrase stands for Structured Query Language. The programming language was developed in 1980 by the American National Standards Institute (ANSI) and the International Organization for Standardization (ISO). The scope of SQL includes data insert, query, update and delete, modification, and data access control.

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