Руководство по PHP
Пред. |  | След.

# 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()

Пред. | Начало | След.
ctype_alpha | Уровень выше | ctype_digit