ctype_cntrl

(PHP 4 >= 4.0.4, PHP 5)

ctype_cntrl -- Check for control character(s)

Leírás

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.

Paraméterek

text

The tested string.

Visszatérési értékek

Returns TRUE if every character in text is a letter from the current locale, FALSE otherwise.

Példák

Példa 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";
    }
}
?>

A fenti példa a következő kimenetet adja:

The string 'string1' consists of all control characters.
The string 'string2' does not consists of all control characters.

Lásd még

ctype_print()