How to use php strtoupper function?

php The strtoupper function is used to convert a string to uppercase. Its syntax is strtoupper(string). The parameter string is required and refers to the string to be converted.

php How to use strtoupper function?

Definition and usage

strtoupper() function converts a string to uppercase.

Note: This function is binary safe.

Related functions:

lcfirst() - Convert the first character in the string to lowercase

strtolower() - Convert the string to lowercase

ucfirst() - Converts the first character in the string to uppercase

ucwords() - Converts the first character of each word in the string to uppercase

Syntax

strtoupper(string)

Parameters

string Required. Specifies the string to be converted.

Return value: Returns the string converted to uppercase.

PHP Version: 4

Example

Convert all characters to uppercase:

Output:

HELLO WORLD!

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