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