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ctype_cntrl

ctype_cntrl

(PHP 4 >= 4.0.4, PHP 5)

ctype_cntrl -- Check for control character(s)

Popis

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.

Seznam parametrů

text

The tested string.

Návratové hodnoty

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

Příklady

Příklad 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";
    }
}
?>

Výše uvedený příklad vypíše:

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

Viz také

ctype_print()