» google_pagerank()
  » preg_replace()
  » imagecreatefrompng()
  » site_pageranks()
  » imagepng()
  » imagedestroy()
  » imagestring()
  » imagecolorallocate()
  » htmlentities()
  » preg_match()
  » fopen()
  » header()
  » getimagesize()
  » session_start()
  » preg_match_all()
  » htmlspecialchars()
  » ob_start()
  » ob_flush()
  » flush()
  » strstr()
  » strpos()
  » setcookie()
  » str_replace()
  » array2vars()
  » nl2br()
  » preg_split()
  » ereg()
  » ereg_replace()
  » urlencode()
  » readgzfile()

Become a sponsor for $15/month. Link is sitewide - PR5 homepage, 20+ PR4 pages, 90+ PR3 pages. Email dave[AT]icemelon[D0T]c0m.

(PHP 4 >= 4.0.4, PHP 5)

ctype_xdigit --  Check for character(s) representing a hexadecimal digit

Description

bool ctype_xdigit ( string text )

Checks if all of the characters in the provided string, text , are hexadecimal 'digits'.

Parameters

text

The tested string.

Return Values

Returns TRUE if every character in text is a hexadecimal 'digit', that is a decimal digit or a character from [A-Fa-f] , FALSE otherwise.

Examples

Example 1. A ctype_xdigit() example

<?php
$strings = array('AB10BC99', 'AR1012', 'ab12bc99');
foreach ($strings as $testcase) {
    if (ctype_xdigit($testcase)) {
        echo "The string $testcase consists of all hexadecimal digits.\n";
    } else {
        echo "The string $testcase does not consist of all hexadecimal digits.\n";
    }
}
?>

The above example will output:

The string AB10BC99 consists of all hexadecimal digits.
The string AR1012 does not consist of all hexadecimal digits.
The string ab12bc99 consists of all hexadecimal digits.

Related Function(s)

ctype_digit()

curl_init()

curl_setopt()

curl_exec()

curl_close()

curl_copy_handle()

curl_errno()

curl_error()

curl_getinfo()

curl_multi_add_handle()

curl_multi_close()

curl_multi_exec()

curl_multi_getcontent()

curl_multi_info_read()

curl_multi_init()

curl_multi_remove_handle()

curl_multi_select()

curl_version()