Question

Write the features of built-in Functions.

Answer 1

Pre-defined or system or built-in function PHP has a wide collection of built-in functions that can be called directly from within a script, to perform a specific task. These built-in functions are what makes PHP very efficient and productive. Scripting language no installation is required to use these functions. The PHP built-in function may be classified into various categories like;

PHP string function	Functions that help us to manipulate strings
PHP array function	Functions that allow you to access and manipulate arrays.
PHP math function	Functions that help to perform mathematical operations
PHP MySQLi function	Functions that allows you to access MySQL database servers.
PHP file system function	Functions that allow you to access and manipulate the file system