ctype_upper

函数原型

范例(上例将输出：)

ctype_upper

(PHP 4 >= 4.0.4, PHP 5)

ctype_upper -- 检查大写字符

函数原型

bool ctype_upper ( string text )

检查大写字符

范例

<?php

$strings = array('AKLWC139', 'LMNSDO', 'akwSKWsm');

foreach ($strings as $testcase) {

if (ctype_upper($testcase)) {

echo "The string $testcase consists of all uppercase letters.\";

} else {

echo "The string $testcase does not consist of all uppercase letters.\";

}

}

?>

上例将输出：

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.