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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.
返回值
Returns TRUE if every character in text is
an uppercase letter in the current locale.
例
例子 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";
}
}
?>
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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. |
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ctype_space