ctype_lower
(PHP 4 >= 4.0.4, PHP 5)
ctype_lower -- Check for lowercase character(s)
说明
bool
ctype_lower ( string text )
Checks if all of the characters in the provided string,
text, are lowercase letters.
返回值
Returns TRUE if every character in text is
a lowercase letter in the current locale.
例
例子 1. A ctype_lower() example (using the default locale)
<?php
$strings = array('aac123', 'qiutoas', 'QASsdks');
foreach ($strings as $testcase) {
if (ctype_lower($testcase)) {
echo "The string $testcase consists of all lowercase letters.\n";
} else {
echo "The string $testcase does not consist of all lowercase letters.\n";
}
}
?>
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上例将输出： The string aac123 does not consist of all lowercase letters.
The string qiutoas consists of all lowercase letters.
The string QASsdks does not consist of all lowercase letters. |
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