ctype_space

(PHP 4 >= 4.0.4, PHP 5)

ctype_space -- Check for whitespace character(s)

Описание

bool ctype_space ( string text )

Checks if all of the characters in the provided string, text, creates whitespace.

Список параметров

text

The tested string.

Возвращаемые значения

Returns TRUE if every character in text creates some sort of white space, FALSE otherwise. Besides the blank character this also includes tab, vertical tab, line feed, carriage return and form feed characters.

Примеры

Пример 1. A ctype_space() example

<?php
$strings = array('string1' => "\n\r\t", 'string2' => "\narf12", 'string3' => '\n\r\t');
foreach ($strings as $name => $testcase) {
   if (ctype_space($testcase)) {
       echo "The string '$name' consists of all whitespace characters.\n";
   } else {
       echo "The string '$name' does not consist of all whitespace characters.\n";
   }
}
?>

Результат выполнения данного примера:

The string 'string1' consists of all whitespace characters.
The string 'string2' does not consist of all whitespace characters.
The string 'string3' does not consist of all whitespace characters.

Смотрите также

ctype_cntrl()
ctype_graph()
ctype_punct()



ctype_space
Wes Peters
28-Apr-2004 06:02
ctype_space returns TRUE for a zero-length string.  This makes it very handy for checking for empty submissions when browsers often return extraneous whitespace in empty-looking TEXTAREA controls.

(see also http://bugs.php.net/30945)

<ctype_punctctype_upper>
 Last updated: Tue, 15 Nov 2005