Have you ever need to generate a random string or generate a unique id using PHP. Below is a complete example of how to do so. Simply copy the entire code into a new php page and then open it.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <title>PHP Random String Generator</title> </head> <body> <?php # AUTHOR: Daniel Pineault, CARDA Consultants Inc. # DATE: 2010-06-25 # PURPOSE: Generate a random string or unique Id # COPYRIGHT: You are free to use this code as you wish as long as # this header is include in the final work. This is # provided 'AS IS' and I assume no liability for its # usage. # foreach($_POST as $key=>$value) { $$key = strip_tags($value); //sanitize provided user entries } if(isset($GenRndStr)){ $sUpper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; $sLower = "abcdefghijklmnopqrstuvwxyz"; $sNumbers = "0123456789"; $sSpecial = "!@#$%^&*()[]{},.;:'/\~-+=|<>"; if($UCase==1){ $s .= $sUpper; } if($LCase==1){ $s .= $sLower; } if($Nbr==1){ $s .= $sNumbers; } if($SpecChrs==1){ $s .= $sSpecial; } if(strlen($ExChrs)>0){ for($k = 0; $k <= (strlen($ExChrs)-1); $k++){ $s = str_replace($ExChrs{$k}, "", $s); } } $sLen = $RandStrLen; for($i = 1; $i <= $sLen; $i++){ $sRandString .= $s{rand(1,strlen($s))}; } } ?> <h1>PHP Random String Generator</h1> <form id="RndStrGen" name="RndStrGen" method="post"> <table border="0" cellspacing="0" cellpadding="2"> <tr> <td valign="top"><strong>Password Characteristics</strong> </td> <td><input type="checkbox" id="UCase" name="UCase" value="1"<?php if ($UCase == 1) { echo ' checked="checked"'; } ?> /> Upper Case Characters<br /> <input type="checkbox" id="LCase" name="LCase" value="1"<?php if ($LCase == 1) { echo ' checked="checked"'; } ?> /> Lower Case Characters<br /> <input type="checkbox" id="Nbr" name="Nbr" value="1"<?php if ($Nbr == 1) { echo ' checked="checked"'; } ?> /> Numbers<br /> <input type="checkbox" id="SpecChrs" name="SpecChrs" value="1"<?php if ($SpecChrs == 1) { echo ' checked="checked"'; } ?> /> Special Characters (!@#$%^&*()[]{},.;:'/\~-+=|<>)</td> </tr> <tr> <td valign="top"><strong>Characters to Exclude</strong></td> <td><input type="text" id="ExChrs" name="ExChrs" value="<?= $ExChrs ?>" /></td> </tr> <tr> <td><strong>Password Length</strong> </td> <td><input type="text" id="RandStrLen" name="RandStrLen" value="<?= $RandStrLen ?>" /></td> </tr> </table> <p> <input type="submit" id="GenRndStr" name="GenRndStr" value="Generate String" /> </p> </form> <?php if(isset($sRandString)){ echo "<p>".$sRandString."</p>\n"; } ?> </body> </html> |
