rtrim

In programming-speak, trimming a string means removing unwanted characters — typically whitespace characters — from either end (or both ends) of the string. This is useful in a number of scenarios, such as:

• Cleaning up user input, such as text field values in a submitted form
• Removing unwanted line-break characters at the end of a line
• Ensuring that a string is in the correct format for passing to another program

In this article you explore 3 useful PHP functions that you can use to trim strings:

• trim() for trimming both ends of a string
• ltrim() for trimming the beginning of a string, and
• rtrim() for trimming the end of a string.

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