ctype_cntrl

(PHP 4 >= 4.0.4, PHP 5)

ctype_cntrl -- Check for control character(s)

Opis

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, esc.

Parametry

text

The tested string.

Zwracane wartości

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

Przykłady

Przykład 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";
    }
}
?>

Powyższy przykład wyświetli:

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

Patrz także

ctype_print()

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Generated: 2007-01-26 18:02:24