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.
Коментарии
Returns true if bytes are in the range of \x00-\x1f or \x7f (del). Returns false if bytes are in the range of \x20-\x7e or \x80-\xff.