Syntax
| ctype_upper ( $text ); |
Definition and Usage
This function checks if all of the characters in the provided string, text, are uppercase characters.
Paramters
| Parameter | Description |
|---|---|
| text | Required. The tested string. |
Return Value
Returns TRUE if every character in text is an uppercase letter in the current locale.
Example
Try out following example:
<?php
$strings = array('AbCd1zyZ9', 'FOOBAR');
foreach ($strings as $testcase) {
if (ctype_upper($testcase)) {
echo "$testcase consists of all uppercase letters.<br />";
} else {
echo "$testcase does not have all uppercase letters.<br />";
}
}
?>
|
This will produce following result:
AbCd1zyZ9 does not have all uppercase letters. FOOBAR consists of all uppercase letters. |
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