ctype_cntrl

(PHP 4 >= 4.0.4, PHP 5)

ctype_cntrl -- Check for control character(s)

Beskrivelse

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.

Parameterliste

text

The tested string.

Returneringsværdier

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

Eksempler

Eksempel 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";
    }
}
?>

Ovenstående eksempel vil udskrive:

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

Se også

ctype_print()