The strtoupper function is a built-in function in PHP that converts all the characters of a string to uppercase. This function has a string as a parameter, which will be converted to uppercase.
The output of this code will be "123ABC".
This function is a part of the PHP standard library.
PHP Tools::strtoupper - 30 examples found. These are the top rated real world PHP examples of Tools::strtoupper extracted from open source projects. You can rate examples to help us improve the quality of examples.