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Ctype Funkcje
PHP Manual

# ctype_lower

(PHP 4 >= 4.0.4, PHP 5)

ctype_lower — Check for lowercase character(s)

### Opis

bool ctype_lower ( string `$text` )

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

### Parametry

`text`

  The tested string.

### Zwracane wartości

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

### Przykłady

Przykład #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";
}
}
?>`

Powyższy przykład wyświetli:

    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.

### Zobacz też:

- ctype_alpha() - Check for alphabetic character(s)
- ctype_upper() - Check for uppercase character(s)
- setlocale() - Set locale information

ctype_graph
ctype_print
Ctype Funkcje
PHP Manual