strtoupper

Definition and usage

strtoupper() function converts the string to uppercase.

Note: This function is binary safe.

Related functions:

• lcfirst() - Convert first character in a string to lowercase
• strtolower() - Convert strings to lowercase
• ucfirst() - Convert the first character in a string to uppercase
• ucwords() - Convert the first character of each word in a string to uppercase

Example

Convert all characters to capitalization:

 <?php
echo strtoupper ( "Hello WORLD!" ) ;
?>

Try it yourself

grammar

 strtoupper ( string )