Random alphabet in PHP

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               function RandomAlpha($len){
                  $key = "";
                  for($x=0;$x<$len;$x++)
                     $key .= chr(ord('A') rand(0,25));
                 
                  return $key;
               }
               function RandomAlphaNoDuplicate($len){
                  $key = "";
                   while(strlen($key) < $len){
                     $key .= chr(ord('A') rand(0,25));
                     $key = implode('',array_unique(str_split($key)));
                   }
                  return $key;
               }
               
                echo RandomAlphaNoDuplicate(12);
            
          
        

Easiest way to generate a random password in PHP

In many web app, there are alot of them use random password generator for their user such as 2 step validation, phone verification, email verification and more. By using str_shuffle() in PHP become more handy to create random password:

 * note that..this is not a secure random password.. please use other encryption method or use java randomLib

1. <?php
2. function characterSuffle($len = 6) {
3.     $list = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*()_-=+;:,.?";
4.     $str = substr(str_shuffle($list), 0, $len );
5.     return $str;
6. }
9. echo characterSuffle();
10. echo characterSuffle(8);
11. echo characterSuffle(16);
12. echo characterSuffle(32);
13. ?>

How to detect IE in php and Javascript

In PHP

1. $chrome = 'https://www.google.com/chrome/browser/desktop';
2. if (preg_match('~MSIE|Internet Explorer~i', $_SERVER['HTTP_USER_AGENT']) ||
3.        (strpos($_SERVER['HTTP_USER_AGENT'], 'Trident/7.0; rv:11.0') !== false) ||
4.        (strpos($_SERVER['HTTP_USER_AGENT'], "Edge") == true)) {
5.         header('Location:'.$chrome);
6. }
7. else{
8.     // goto your page
9. }

In Javascript

1. // detect IE ersion
2. var IEversion = detectIE();
4. if (IEversion !== false) {
5.     alert('You are using IE'+IEversion);
6.     document.location.href = "https://www.google.com/chrome/browser/desktop/";
7. }
9. function detectIE() {
10.     var getAgent = window.navigator.userAgent;
12.     var msie = getAgent.indexOf('MSIE ');
13.     if (msie > 0) {
14.         return parseInt(getAgent.substring(msie+5, getAgent.indexOf('.', msie)), 10);
15.     }
17.     var trident = getAgent.indexOf('Trident/');
18.     if (trident > 0) {
19.         var rv = getAgent.indexOf('rv:');
20.         return parseInt(getAgent.substring(rv+3, getAgent.indexOf('.', rv)), 10);
21.     }
23.     var edge = getAgent.indexOf('Edge/');
24.     if (edge > 0) {
25.         return parseInt(getAgent.substring(edge+5, getAgent.indexOf('.', edge)), 10);
26.     }
28.     return false;
29. }