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PHP : Function Reference : Character Type Functions : ctype_upper

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)

<?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.

Code Examples / Notes » ctype_upper

brunobg

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
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