ctype_upper

ctype_upper

Check for uppercase character(s)

bool **ctype_upper** mixed $text

Checks if all of the characters in the provided , , are uppercase characters. string``text

textThe tested string. note.ctype.parameter.integer note.ctype.parameter.non-string

Returns true if every character in is an uppercase letter in the current locale. ctype.result.empty-string text

Voorbeeld: A example (using the default locale)

<?php
$strings = array('AKLWC139', 'LMNSDO', 'akwSKWsm');
foreach ($strings as $testcase) {
    if (ctype_upper($testcase)) {
        echo "The string $testcase consists of all uppercase letters.\n";
    } else {
        echo "The string $testcase does not consist of all uppercase letters.\n";
    }
}
?>

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.

ctype_alpha``ctype_lower``setlocale``IntlChar::isupper