Php/docs/function.ctype-upper

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ctype_upper

(PHP 4 >= 4.0.4, PHP 5, PHP 7)

ctype_upperCheck for uppercase character(s)


Description

ctype_upper ( mixed $text ) : bool

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


Parameters

text

The tested string.

Note:

If an int between -128 and 255 inclusive is provided, it is interpreted as the ASCII value of a single character (negative values have 256 added in order to allow characters in the Extended ASCII range). Any other integer is interpreted as a string containing the decimal digits of the integer.


Return Values

Returns TRUE if every character in text is an uppercase letter in the current locale.


Examples

Example #1 A ctype_upper() 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 above example will output:


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.

See Also