PHP. Учебник. 2005

ctype_cntrl

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, 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()

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