PHP: ctype_cntrl - Manual

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Last updated: Sat, 27 Jan 2007

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# ctype_cntrl

(PHP 4 >= 4.0.4, PHP 5)

ctype_cntrl -- Check for control character(s)

## Описание

bool ctype_cntrl ( string text )

Checks if all of the characters in the provided string, `text`, are control characters. Control characters are e.g. line feed, tab, escape.

## Список параметров

`text`

  The tested string.

## Возвращаемые значения

Returns `TRUE` if every character in `text` is a control character from the current locale, `FALSE` otherwise.

## Примеры

Пример 1. A ctype_cntrl() example

`<?php
$strings = array('string1' => "\n\r\t", 'string2' => 'arf12');
foreach ($strings as $name => $testcase) {
if (ctype_cntrl($testcase)) {
echo "The string '$name' consists of all control characters.\n";
} else {
echo "The string '$name' does not consist of all control characters.\n";
}
}
?>`

Результат выполнения данного примера:

    The string 'string1' consists of all control characters.
    The string 'string2' does not consist of all control characters.

## Смотрите также

ctype_print()

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Last updated: Sat, 27 Jan 2007
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