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.

参数

text: The tested string.

返回值

Returns TRUE if every character in text is a lowercase letter in the current locale.

范例

Example#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";
    }
}
?>

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.

参见

ctype_alpha()
ctype_upper()
setlocale()


	PHP5中文手册 ctype_graph ctype_print ctype PHP Manual 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. 参数 `text` The tested string. 返回值 Returns `TRUE` if every character in `text` is a lowercase letter in the current locale. 范例 Example#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"; } } ?>` 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. 参见 ctype_alpha() ctype_upper() setlocale() ctype_graph ctype_print ctype PHP Manual