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, esc.

Список параметров

text

The tested string.

Возвращаемые значения

Returns TRUE if every character in text is a letter 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 consists of all control characters.

Смотрите также

ctype_print()



ctype_cntrl
Simon Hartley - srhartley at hotmail dot com
11-Apr-2004 08:15
When evaluting a string for control characters ensure that the string is surrounded by double (not single quotes).

<ctype_alphactype_digit>
 Last updated: Tue, 15 Nov 2005