ctype_upper

Check for uppercase character(s) (PHP 4 >= 4.0.4, PHP 5)
bool ctype_upper ( string text )

Example 425. A ctype_upper() example (using the default locale)

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<?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 above example will output:

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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.

Code Examples / Notes » ctype_upper

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Take notice that this function returns false if there is any whitespace in the string.

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ctype_alnum
ctype_alpha
ctype_cntrl
ctype_digit
ctype_graph
ctype_lower
ctype_print
ctype_punct
ctype_space
ctype_upper
ctype_xdigit

ctype_upper

Check for uppercase character(s) (PHP 4 >= 4.0.4, PHP 5) bool ctype_upper ( string text )

Example 425. A ctype_upper() example (using the default locale)

Code Examples / Notes » ctype_upper

Change Language

Check for uppercase character(s) (PHP 4 >= 4.0.4, PHP 5)
bool ctype_upper ( string text )