GoLang ctype_upper

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PHP ctype_upper

PHP original manual for ctype_upper [ show | php.net ]

ctype_upper

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

ctype_upper — Check for uppercase character(s)

Description

bool ctype_upper ( string $text )

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

Parameters

text

The tested string.

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.

Notes

Note:

If an integer 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.

See Also