I found this Stack Overflow post explaining how you can generate random coupon codes.
I'm looking into using that code and generate multiple coupons at once (e.g. 50), while separate them by a comma.
The output would be: COUPON-HMECN, COUPON-UYSNC, etc.
Code below and codepad example available.
$chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
$res = "COUPON-";
for ($i = 0; $i < 5; $i++) {
$res .= $chars[mt_rand(0, strlen($chars)-1)];
}
echo $res . ",";
$chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
$numCodesToGenerate = 5;
for ($n = 0; $n < $numCodesToGenerate; $n++)
{
$res = "COUPON-";
for ($i = 0; $i < 5; $i++) {
$res .= $chars[mt_rand(0, strlen($chars)-1)];
}
echo $res . ",";
}
Why not use uniqid()?
$coupon_str = '';
$seperator = '';
for($i = 0; $i < 50; $i++) {
$coupon_str .= $seperator . uniqid('COUPON-');
$seperator = ',';
}
echo $coupon_str;
Output:
COUPON-502373ac95dd2,COUPON-502373ac95de8,COUPON-502373ac95ded,....
Here is a much neater version (and faster) that does what you need:
function MakeCouponCode() {
$res = "COUPON-";
for($i = 0; $i < 5; ++$i)
$res .= chr(mt_rand(0, 1) == 0 ? mt_rand(65, 90) : mt_rand(48, 57));
return $res;
}
$coupons = array();
for($i = 0; $i < 5; ++$i)
$coupons[] = MakeCouponCode();
echo implode(', ', $coupons);
Output:
COUPON-D707Y, COUPON-4B37E, COUPON-3O397, COUPON-M799X, COUPON-24Q36
You can use the coupon code generator PHP class file to generate N number of coupons and its customizable, with various options of adding own mask with own prefix and suffix. The coupon codes are separated by comma. Simple PHP coupon code generator
Example:
coupon::generate(8); // J5BST6NQ
Related
I build a webpage to crack simple MD5 hash of a four digit pin for fun. The method I used was basically try all combination and check against the MD5 value the user has entered. Below is the PHP code I created to accomplish the goal.
Debug Output:
<?php
$answer = "PIN not found";
if (isset($_GET['md5'])) {
$txt = 'abcdefjhig';
$time_pre = microtime(TRUE);
$value = $_GET['md5'];
$show = 15;
for ($i = 0; $i <= 9; $i++) {
$first = $i;
for ($j = 0; $j <= 9; $j++) {
$second = $j;
for ($k = 0; $k <= 9; $k++) {
$third = $k;
for ($x = 0; $x <= 9; $x++) {
$fourth = $x;
$whole = $first . $second . $third . $fourth;
$check = hash('md5', $whole);
if ($check == $value) {
$answer = $whole;
echo "The pin is $answer";
}
if ($show > 0) {
print"$check $whole \n";
$show = $show - 1;
}
}
}
}
}
echo "\n";
$time_post = microtime(TRUE);
print "Elapsed time:";
print $time_post - $time_pre;
}
?>
Notice that in the middle there are four very similar for loops,I tried to simplify this by using functions, but it just returns one four digit number which is 9999 instead of all of them.
Below is the function I created:
function construct($input){
for($i=0; $i<=9, $i++){
$input=$i;
}
return $input
}
Then I tried to call this function for four times to form all of the four digit numbers but it just gives me 9999. Can anybody help? Thanks a lot.
Try this:
for ($i=0; $i<=9999 ; $i++) {
$whole = sprintf('%04d', $i);
$check=hash('md5', $whole);
if($check==$value){
$answer=$whole;
echo "The pin is $answer";
break; //remove this if you do not want to break the loop here
}
if ($show>0) {
print"$check $whole \n";
$show=$show-1;
}
}
You're using numbers from 0 to 9999, so why just loop through those numbers? You can add zero's by using str_pad() like so:
for ($i = 0; $i <= 9999; $i++) {
$whole = str_pad($i, 4, '0', STR_PAD_LEFT);
}
Also I'd like to mention that you really should think about better formatting of your code, especially indentation
My script read emails from file text.txt, i want to record emails and unique random code for every email in mySQL database. All works correct, but everytime i get the same "random code".
I get this:
example1#stack.com vsdggd
example2#stack.com vsdggd
example3#stack.com vsdggd
I want to get:
example1#stack.com bsgfdg
example2#stack.com jhngfv
example3#stack.com sdfasd
Code:
<?php
function generatePassword($length = 6){
$chars = 'abcdefhiknrstyz';
$numChars = strlen($chars);
$string = '';
for ($i = 0; $i < $length; $i++) {
$string .= substr($chars, rand(1, $numChars) - 1, 1);
}
return $string;
}
include('../connect.php');
$query = 'insert into cc (email,token) values ("%s","'. generatePassword(6) .'");';
$lines = file('text.txt');//your filename
for($i=0; $i < count($lines); $i++){
mysql_query(sprintf($query, mysql_real_escape_string($lines[$i]))) or die(mysql_error() . '<br><br>' . '<b>Query:</b> ' . $query);
}
?>
You are only calling generatePassword() once, to fix your code as it is, you want:
<?php
function generatePassword($length = 6){
$chars = 'abcdefhiknrstyz';
$numChars = strlen($chars);
$string = '';
for ($i = 0; $i < $length; $i++) {
$string .= substr($chars, rand(1, $numChars) - 1, 1);
}
return $string;
}
include('../connect.php');
$query = 'insert into cc (email,token) values ("%s","%s");';
$lines = file('text.txt');//your filename
for($i=0; $i < count($lines); $i++){
mysql_query(sprintf($query, mysql_real_escape_string($lines[$i]), generatePassword(6))) or die(mysql_error() . '<br><br>' . '<b>Query:</b> ' . $query);
}
?>
So that generatePassword() gets called for each row.
Also you should really be using the newer mysqli or ideally PDO as the older mysql is deprecated and has been removed from PHP7.
I would like to Convert simple string to set based on below logic
if string is 3,4-8-7,5 then I need the set as (3,8,7),(4,8,5).
The Logic behind to building the set are we need to consider ',' as OR condition and '-' as AND condition.
I am trying my best using For loop :
$intermediate = array();
$arry_A = explode('-', '3,4-8-7,5');
for ($i = 0; $i < count($arry_A); $i++) {
$arry_B = explode(',', $arry_A[$i]);
for ($j = 0; $j < count($arry_B); $j++) {
if (count($intermediate) > 0) {
for ($k = 0; $k < count($intermediate); $k++) {
$intermediate[$k] = $intermediate[$k] . ',' . $arry_B[$j];
}
} elseif (count($intermediate) === 0) {
$intermediate[0] = $arry_B[$j];
}
}
}
echo $intermediate, should give final result.
This Code works correctly, Try this
<?php
$intermediate = array();
$str="";
$val='3,4-8-7,5';
$vals=str_replace(',','-',$val);
$j=1;
$arry_A = explode('-',$vals );
$str.='(';
for ($i = 0; $i < count($arry_A); $i++) {
if($j==3){
$str.=$arry_A[$i].',';
$str.='),';
$str.='(';
$j=1;
}
else
$str.=$arry_A[$i].',';
$j++;
}
echo substr($str, 0, -2);
?>
I'm try to print an array where every other value is reassigned, as examples (from this):
17.34502870451717,62.46137370987033
To this:
62.46137370987033,17.34502870451717
That part have I succeeded with, but now I have this structure:
[62.46137370987033,[17.34501402936927,]
[62.46123453616544,[17.34525377433593,]
[62.4610178881864,[17.34546663705899,]
This is where I get stuck and do not know how to write.
The structure I want looks like this:
[62.392628, 17.309413],
[62.393162, 17.309193],
[62.393403, 17.30922]
Here is my explode.php (GIST)
<?php
$dwarf = "17.34502870451717,62.46137370987033,17.34501402936927,62.46123453616544";
$minion = explode(",",$dwarf);
$wing = "[";
for ($i = 0;$i < count($minion) -1; $i++) {
echo $wing . $minion[$i+1].",";
if($i%2==1) { echo "]<br />"; }
} echo $minion[0] . $wing;
?>
As I understand it, as long as there's always even pairs it should be as easy as;
<?php
$dwarf = "17.34502870451717,62.46137370987033,17.34501402936927,62.46123453616544";
$minion = explode(",",$dwarf);
$eol = '';
for ($i = 0;$i < count($minion) -1; $i+=2) {
echo $eol.'['.$minion[$i+1].','.$minion[$i]."]";
$eol=',<br/>';
}
echo '<br/>';
>>> [62.46137370987033,17.34502870451717],
>>> [62.46123453616544,17.34501402936927]
Try This
$dwarf = "17.34502870451717,62.46137370987033,17.34501402936927,62.46123453616544";
$minion = explode(",",$dwarf);
$wing = "[";
for ($i = 0;$i < count($minion) -1; $i+=2)
{
echo $kk = $wing . $minion[$i+1].",".$minion[$i]."],<br>";
}
Just a small modification to the given answers
$dwarf = "17.34502870451717,62.46137370987033,17.34501402936927,62.46123453616544";
$minion = explode(",",$dwarf);
$str = '';
for ($i = 0;$i < count($minion) -1; $i+=2) {
$str.='['.$minion[$i+1].','.$minion[$i].'],<br/>';
}
echo rtrim($str,','); // to trim ',' at the end
How can I iteratively create a variant of "Murrays" that has an apostrophe after each letter? The end-result should be:
"m'rrays,mu'rrays,mur'rays,murr'ays,murra'ys,murray's"
My suggestion:
<?php
function generate($str, $add, $separator = ',')
{
$split = str_split($str);
$total = count($split) - 1;
$new = '';
for ($i = 0; $i < $total; $i++)
{
$aux = $split;
$aux[$i+1] = "'" . $aux[$i+1];
$new .= implode('', $aux).$separator;
}
return $new;
}
echo generate('murrays', "'");
?>
You want to iterate through the name, and re-print it with apostrophe's? Try the following:
<?php
$string = "murrays";
$array = str_split($string);
$length = count($array);
$output = "";
for ($i = 0; $i < $length; $i++) {
for($j = 0; $j < $length; $j++) {
$output .= $array[$j];
if ($j == $i)
$output.= "'";
}
if ($i < ($length - 1))
$output .= ",";
}
print $output;
?>
Here’s another solution:
$str = 'murrays';
$variants = array();
$head = '';
$tail = $str;
for ($i=1, $n=strlen($str); $i<$n; $i++) {
$head .= $tail[0];
$tail = substr($tail, 1);
$variants[] = $head . "'" . $tail;
}
var_dump(implode(',', $variants));
well that's why functionnal programming is here
this code works on OCAML and F#, you can easily make it running on C#
let generate str =
let rec gen_aux s index =
match index with
| String.length s -> [s]
| _ -> let part1 = String.substr s 0 index in
let part2 = String.substr s index (String.length s) in
(part1 ^ "'" ^ part2)::gen_aux s (index + 1)
in gen_aux str 1;;
generate "murrays";;
this code returns the original word as the end of the list, you can workaround that :)
Here you go:
$array = array_fill(0, strlen($string) - 1, $string);
implode(',', array_map(create_function('$string, $pos', 'return substr_replace($string, "\'", $pos + 1, 0);'), $array, array_keys($array)));