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 PHP manuál : function.ctype-lower.html

ctype_lower
PHP Manual
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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 )

Checks if all of the characters in the provided string, text, are lowercase letters.

Parameters

text

The tested string.

Return Values

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

Examples

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";
    }
}
?>

The above 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()
setlocale()

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