note 86826 modified in function.rand by danbrown
| From: | danbrown@php.net | Date: | Wed, 05 Nov 2008 15:33:53 +0000 |
| Subject: | note 86826 modified in function.rand by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-146165@lists.php.net to get a copy of this message | ||
This is a function to generate numbers of any length which contain no identical characters
side-by-side. i.e. 11aa22bb33
<?php
function createRandom($number_of_digits=1,$type=3){
// type: 1 - numeric, 2 - letters, 3 - mixed.
for($x=0;$x<$number_of_digits;$x++){
while(substr($num,strlen($num)-1,strlen($num)) == $r){
switch($type){
case "1":
$r = rand(0,9);
break;
case "2":
$r = chr(rand(0,25)+65);
break;
case "3":
if(is_numeric(substr($num,strlen($num)-1,strlen($num)))){
$n = rand(0,999);
if($n % 2){
$r = chr(rand(0,25)+65);
} else {
$r = strtolower(chr(rand(0,25)+65));
}
} else {
$r = rand(0,9);
}
break;
}
}
$new_string .= $r;
}
return $new_string;
}
// Usage Examples Below -
// $number = createRandom(10);
// echo $number;
// Output: 6Q1a8C1u9S
// echo createRandom(10,1);
// Output: 8754381046
// echo createRandom(10,2);
// Output: dNAoQYOtud
// echo createRandom();
// Output: 9
?>
--was--
*** Moderator *** please replace or delete my comment from Oct 10 as there is an error in the
function I posted. Below is the corrected version. Thanks!!! ***
This is a function to generate numbers of any length which contain no identical characters
side-by-side. i.e. 11aa22bb33
<?php
function createRandom($number_of_digits=1,$type=3){
// type: 1 - numeric, 2 - letters, 3 - mixed.
for($x=0;$x<$number_of_digits;$x++){
while(substr($num,strlen($num)-1,strlen($num)) == $r){
switch($type){
case "1":
$r = rand(0,9);
break;
case "2":
$r = chr(rand(0,25)+65);
break;
case "3":
if(is_numeric(substr($num,strlen($num)-1,strlen($num)))){
$n = rand(0,999);
if($n % 2){
$r = chr(rand(0,25)+65);
} else {
$r = strtolower(chr(rand(0,25)+65));
}
} else {
$r = rand(0,9);
}
break;
}
}
$new_string .= $r;
}
return $new_string;
}
// Usage Examples Below -
// $number = createRandom(10);
// echo $number;
// Output: 6Q1a8C1u9S
// echo createRandom(10,1);
// Output: 8754381046
// echo createRandom(10,2);
// Output: dNAoQYOtud
// echo createRandom();
// Output: 9
?>
http://php.net/manual/en/function.rand.php