ctype_upper

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

ctype_upper — 锟斤拷锟斤拷写锟斤拷母锟斤拷锟�

说锟斤拷

ctype_upper ( string $text ) : bool

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text

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锟斤拷锟斤拷值

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锟斤拷锟斤拷

Example #1 一锟斤拷 ctype_upper() 锟斤拷锟斤拷 锟斤拷使锟矫碉拷前默锟斤拷锟斤拷锟皆伙拷锟斤拷锟斤拷

<?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";
    }
}
?>

锟斤拷锟斤拷锟斤拷锟教伙拷锟斤拷锟斤拷锟�

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.

注锟斤拷

Note:

锟斤拷锟斤拷锟斤拷锟揭伙拷锟� -128 锟斤拷 255 之锟斤拷(锟斤拷)锟斤拷锟斤拷锟斤拷, 锟斤拷锟结被锟斤拷锟斤拷为锟斤拷值锟斤拷应锟斤拷ASCII锟街凤拷 (锟斤拷值锟斤拷锟斤拷锟斤拷 256 锟斤拷支锟斤拷锟斤拷展ASCII锟街凤拷). 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟结被锟斤拷锟斤拷为锟斤拷值锟斤拷应锟斤拷十锟斤拷锟斤拷锟街凤拷锟斤拷.

锟轿硷拷