ctype_upper

PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8
ctype_upper - Check for uppercase character(s)
Manual
Code Examples

Example #1 A ctype_upper example (using the default locale)

Result: The string AKLWC139 does not consist of all uppercase letters. The string LMNSDO consists of all uppercase letters. The string akwSKWsm does not consist of all uppercase letters.
PHP Version:


Function ctype_upper:

Character type checking Functions

Most used PHP functions