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ctype_lower
Manual PHP
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ctype_lower

(PHP 4 >= 4.0.4, PHP 5)

ctype_lower -- Check for lowercase character(s)

Description

bool ctype_lower ( string text)

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

Exemplu 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";
    }
}
?>

This example will output : 

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.

See also ctype_alpha(), ctype_upper(), and setlocale().

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