PHP Functions

Built-in Functions

Like any other programming language, PHP offers several built-in function for day-to-day use in your coding. Most of these functions are very helpful in achieving your programming goals and are well documented.

Some (not even most) usage of built-in functions are as mentioned below:

. Converting a string of letters to uppercase and lowercase . Displaying and using the date and time . Initializing and closing a database connection . Declaring and using an array . Handling files . Accessing data in forms . Filesystem Functions . Function to open FTP connections . Email related functions . Mathematical Functions . MySQL specific functions . URL Functions

For complete list of built-in PHP functions please visit

http://us2.php.net/quickref.php .