ctype_upper

(PHP 4 >= 4.0.4, PHP 5)

ctype_upper — Check for uppercase character(s)

说明

bool ctype_upper ( string $text )

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

参数

text: The tested string.

返回值

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

范例

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";
    }
}
?>

以上例程会输出：

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.

注释

Note:
如果给出一个 -128 到 255 之间(含)的整数, 将会被解释为该值对应的ASCII字符 (负值将加上 256 以支持扩展ASCII字符). 其它整数将会被解释为该值对应的十进制字符串.

参见

ctype_alpha() - Check for alphabetic character(s)
ctype_lower() - Check for lowercase character(s)
setlocale() - Set locale information

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