Jump to content

CAPTCHA

thenature4u

By thenature4u
in PHP Coding Help

 Share

Recommended Posts

thenature4u Member

thenature4u

Posted
Posted

i have some code for captcha, its working. but my problem is, its printing only 5 characters, i want to increase upto 8 characters. please help me

 

 

mtc.class.php

 

<?php

/**

* My Two Cents - A simple comment system

* 2005-2007 © Andreas Gohr <[email protected]>

*/

 

 

if(!defined('MTC')) define('MTC','MTC'); // used for all POST/GET vars and CSS classes

 

// The MTC main class

class MTC {

    // DB connection

    var $db_host    = 'localhost';

    var $db_user    = 'mtc';

    var $db_pass    = 'mtc';

    var $db_name    = 'mtc';

 

    // web path to the class file

    var $self      = 'mtc.class.php';

 

    // antispam

    var $blacklist  = 'blacklist.txt';

    var $captcha    = true;

    var $audio      = false;

    var $showmail  = false;

 

    // output

    var $addcss    = true;

    var $target    = '';

 

    // admin stuff

    var $adminpass  = '';

    var $notify    = '';

    var $gravopts  = '&rating=R';

 

 

    // language strings

    var $lang = array(

                    'name'      => 'Your Name:',

                    'email'    => 'Your E-Mail:',

                    'web'      => 'Website (optional):',

                    'captcha'  => 'Security Code:',

                    'comment'  => 'Your two Cents:',

                    'info'      => 'No HTML allowed. URLs will be linked with nofollow attribute. Whitespace is preserved.',

                    'audio'    => 'Click to hear the security code spelled.',

                    'nofield'  => 'Sorry, you need to fill all necessary fields!',

                    'noemail'  => 'Sorry, this mail address doesn\'t look valid.',

                    'noweb'    => 'Sorry, this web address doesn\'t look valid.',

                    'nocaptcha' => 'Sorry, the security code was wrong.',

                    'nospam'    => 'Sorry, spamming is not allowed here.',

                );

 

    // you may want to change this for more secure captchas

    var $secret    = 'CHANGEME!';

 

 

    // internal only

    var $db_link;

    var $captchafnt;

    var $audiodir = '';

    var $message  = '';

    var $page    = '';

 

    /**

    * Constructor

    */

    function MTC(){

        $this->captchafnt = glob(dirname(__FILE__).'/MTC/fonts/*.ttf');

        $this->audiodir = dirname(__FILE__).'/MTC/audio/';

 

        // auto set the secret (for lazy ones)

        $secret .= $_SERVER['HTTP_USER_AGENT'];

        $secret .= $_SERVER['SERVER_SOFTWARE'];

        $secret .= __FILE__;

        $secret = md5($secret);

 

        if($this->target){

            $this->target = 'target="'.$this->target.'"';

        }

    }

 

    /**

    * To be called in the head section. Handles intializing

    * and POST/GET variables

    */

    function init($page = ''){

        if(!$page){

            $this->page = $_SERVER['PHP_SELF'];

        }else{

            $this->page = $page;

        }

 

        // we do not touch other's variables

        if(get_magic_quotes_gpc() && !defined('MAGIC_QUOTES_STRIPPED')){

            if (!empty($_POST[MTC]))    $this->_remove_magic_quotes($_POST[MTC]);

            if (!empty($_GET[MTC]))    $this->_remove_magic_quotes($_GET[MTC]);

            if (!empty($_REQUEST[MTC])) $this->_remove_magic_quotes($_REQUEST[MTC]);

        }

 

        echo $this->print_css();

 

        if($_POST[MTC]['do'] == 'add'){

            $this->_add_comment();

        }else if($_POST[MTC]['do'] == 'del'){

            $this->_del_comment();

        }

 

    }

 

    /**

    * return the number of comments

    */

    function comment_count($page=''){

        if(!$page) $page = $this->page;

        $page = md5($page);

 

        $sql = "SELECT COUNT(*) as cnt

                  FROM mtc_comments

                WHERE page = '$page'";

        $handle = $this->_get_dbhandle();

        if(!$handle) return false;

        $result = mysql_query($sql,$handle);

        $row = mysql_fetch_assoc($result);

        mysql_free_result($result);

        return $row['cnt'];

    }

 

    /**

    * List available comments

    */

    function comments($page=''){

        if(!$page) $page = $this->page;

        $page = md5($page);

 

        $sql = "SELECT id, name, mail, web, text, date

                  FROM mtc_comments

                WHERE page = '$page'

              ORDER BY date";

 

        $handle = $this->_get_dbhandle();

        if(!$handle) return;

        $result = mysql_query($sql,$handle);

 

        while ($row = mysql_fetch_assoc($result)) {

            $this->format_comment($row);

        }

        mysql_free_result($result);

    }

 

    /**

    * Show the form to add new comments

    */

    function comment_form(){

 

        /*echo '<div class="'.MTC.'_form" id="'.MTC.'_form">';

        $this->_print_message();

        echo '<form action="#'.MTC.'_form" method="post" accept-charset="utf-8">';

        echo '<input type="hidden" name="'.MTC.'[do]" value="add" style="display:none" />';

        echo '<input type="hidden" name="'.MTC.'

" value="'.htmlspecialchars($this->page).'" style="display:none" />';

 

        echo '<div class="'.MTC.'_name">';

        echo '<label for="'.MTC.'_name">'.$this->lang['name'].'</label>';

        echo '<input type="text" name="'.MTC.'[name]" value="'.htmlspecialchars($_POST[MTC]['name']).'" id="'.MTC.'_name" />';

        echo '</div>';

 

        echo '<div class="'.MTC.'_mail">';

        echo '<label for="'.MTC.'_mail">'.$this->lang['email'].'</label>';

        echo '<input type="text" name="'.MTC.'[mail]" value="'.htmlspecialchars($_POST[MTC]['mail']).'" id="'.MTC.'_mail" />';

        echo '</div>';

 

        echo '<div class="'.MTC.'_web">';

        echo '<label for="'.MTC.'_web">'.$this->lang['web'].'</label>';

        echo '<input type="text" name="'.MTC.'[web]" value="'.htmlspecialchars($_POST[MTC]['web']).'" id="'.MTC.'_web" />';

        echo '</div>';*/

 

        if($this->captcha){

            echo '<div class="'.MTC.'_captcha">';

            //echo '<label for="'.MTC.'_captcha">'.$this->lang['captcha'].'</label>';

          // echo '<input type="text" name="'.MTC.'[captcha]" value="" id="'.MTC.'_captcha" />';

            echo '</div>';

            $this->print_captcha();

        }

 

        /*echo '<div class="'.MTC.'_text">';

        echo '<label for="'.MTC.'_text">'.$this->lang['comment'].'</label>';

        echo '<textarea cols="40" rows="10" name="'.MTC.'[text]" id="'.MTC.'_text">'.htmlspecialchars($_POST[MTC]['text']).'</textarea>';

        echo '</div>';

 

        echo '<input type="submit" value="Save" />';

        echo '<p class="'.MTC.'_info">'.$this->lang['info'].'</p>';

        echo '</form>';

        echo '</div>';*/

    }

 

    /**

    * Defines how a comment is printed. You may want to tweak this, but using CSS should be

    * enough usually

    */

    function format_comment($row){

        static $number = 0;

        $number++;

 

        $md5 = md5($row['mail']);

        $obf = strtr($row['mail'],array('@' => ' [at] ', '.' => ' [dot] ', '-' => ' [dash] '));

 

        $text = htmlspecialchars($row['text']);

        $text = preg_replace('/\t/','    ',$text);

        $text = preg_replace('/  /','  ',$text);

        $text = preg_replace_callback('/((https?|ftp):\/\/[\w-?&;#~=\.\/\@]+[\w\/])/ui',

                                      array($this,'_format_link'),$text);

        $text = nl2br($text);

 

        $opts = str_replace('@MD5@',$md5,$this->gravopts);

 

        echo '<div class="'.MTC.'_comment" id="comment-'.$number.'">';

        echo '<img src="http://www.gravatar.com/avatar.php?gravatar_id='.$md5.$opts.'" alt="" />';

        echo '<a href="#comment-'.$number.'" rel="self bookmark" class="'.MTC.'_link">'.$number.'</a>';

 

        echo '<div class="'.MTC.'_text">';

        echo $text;

        echo '</div>';

 

        echo '<div class="'.MTC.'_info">';

 

        echo '<div class="'.MTC.'_date">';

        echo $row['date'];

        echo '</div>';

 

        echo '<div class="'.MTC.'_user">';

        if($row['web']){

            echo '<a href="'.htmlspecialchars($row['web']).'" rel="nofollow" '.$this->target.' class="url">';

            echo htmlspecialchars($row['name']);

            echo '</a>';

        }elseif($this->showmail){

            echo '<a href="mailto:'.htmlspecialchars($obf).'" class="mail">';

            echo htmlspecialchars($row['name']);

            echo '</a>';

        }else{

            echo htmlspecialchars($row['name']);

        }

        echo '</div>';

 

        echo '</div>';

 

        echo '<div class="'.MTC.'_clear"></div>';

        $this->_admin_opts($row['id']);

        echo '</div>';

    }

 

    /**

    * Prints minimal CSS for initial styling. Can be suppressed

    * with the addcss property.

    */

    function print_css(){

        if(!$this->addcss) return;

        echo '<style type="text/css">';

        echo '.'.MTC."_message { text-align: center; color: #f00 }";

 

        echo '#'.MTC."_form input { margin-left: 50px; display: block; width: 250px; }";

        echo '#'.MTC."_form textarea { margin-left: 50px; display: block; width: 550px; }";

        echo '#'.MTC."_form div.".MTC."_name { float: left; }";

        echo '#'.MTC."_form div.".MTC."_mail { float: left; }";

        echo '#'.MTC."_form div.".MTC."_web  { float: left; clear: left;}";

        echo '#'.MTC."_form div.".MTC."_captcha { float: left; clear: left;}";

        echo '#'.MTC."_form img.".MTC."_captcha { float: left; margin-left: 50px;}";

        echo '#'.MTC."_form div.".MTC."_text { clear: left; }";

 

        echo 'div.'.MTC."_comment { border-bottom: 1px solid #000; margin-top: 0.5em; }";

        echo 'div.'.MTC."_comment img { float:left; z-index: 10}";

        echo 'div.'.MTC."_comment a.".MTC."_link { text-decoration: none; position: absolute; color: #999; font-size: 1.5em; z-index:50; float: left; font-weight: bold;}";

        echo 'div.'.MTC."_comment div.".MTC."_date { display: inline; margin-right: 0.5em }";

        echo 'div.'.MTC."_comment div.".MTC."_info { margin-left: 100px; font-style: italic;}";

        echo 'div.'.MTC."_comment div.".MTC."_user { display: inline; }";

        echo 'div.'.MTC."_comment div.".MTC."_text { margin-left: 100px; margin-bottom: 1em; }";

        echo 'div.'.MTC."_comment div.".MTC."_clear { clear: both; line-height: 1px; height: 1px; }";

        echo '</style>';

    }

 

    /**

    * Creates a simple 200x50 CAPTCHA image

    */

    function captcha_image(){

        $text = $this->x_Decrypt($_REQUEST[MTC]['captcha'],$this->secret);

 

        // create a white image

        $img = imagecreate(200, 50);

        imagecolorallocate($img, 255, 255, 255);

 

        // add some lines as background noise

        for ($i = 0; $i < 60; $i++) {

            $color = imagecolorallocate($img,rand(100, 250),rand(100, 250),rand(100, 250));

            imageline($img,rand(0,200),rand(0,50),rand(0,200),rand(0,50),$color);

        }

 

        // draw the letters

        for ($i = 0; $i < strlen($text); $i++){

            $font  = $this->captchafnt[array_rand($this->captchafnt)];

            $color = imagecolorallocate($img, rand(0, 100), rand(0, 100), rand(0, 100));

            $size  = rand(16,25);

            $angle = rand(-30, 30);

 

            $x = 10 + $i * 40;

            $cheight = $size + ($size*0.5);

            $y = floor(50 / 2 + $cheight / 4);

 

            imagettftext($img, $size, $angle, $x, $y, $color, $font, $text[$i]);

        }

 

        header("Content-type: image/jpeg");

        imagejpeg($img);

        imagedestroy($img);

    }

 

    /**

    * Stiches an audio CAPTCHA

    */

    function captcha_audio(){

        $text = $this->x_Decrypt($_REQUEST[MTC]['captcha'],$this->secret);

        $text = strtolower($text);

 

        // prepare wave files

        $wavs = array();

        for($i=0;$i<5;$i++){

            $wavs[] = $this->audiodir.'/'.$text{$i}.'.wav';

        }

        // send stiched one

        header('Content-type: audio/x-wav');

        header('Content-Disposition: attachment;filename=captcha.wav');

        echo $this->_joinwavs($wavs);

    }

 

    /**

    * Print the HTML for the CAPTCHA

    */

    function print_captcha(){

    $code = $this->_gen_rand();

// Here the value of text1 is use for store in session by rakesh..

$text1 = $code;

        $code = $this->x_Encrypt($code,$this->secret);

 

 

        echo '<input type="hidden" name="MTC

" value="'.htmlspecialchars($code).'" style="display:none" />';

        if($this->audio){
        	$_SESSION['captchaUser']=htmlspecialchars($text1);
            echo '<a href="../mtc/'.$this->self.'?MTC[do]=audio&MTC[captcha]='.urlencode($code).'" title="'.$this->lang['audio'].'">';
        }
        echo '<img src="../mtc/'.$this->self.'?MTC[do]=captcha&MTC[captcha]='.urlencode($code).'" width="200" height="50" alt="CAPTCHA" class="'.MTC.'_captcha" border="0" />';
        if($this->audio){
            echo '</a>';
        }
    }

    /**
     * Generate a 5 char random code
     */
    function _gen_rand(){
        $code = '';
        for($i=0;$i<5;$i++){
            $code .= chr(rand(65, 90));
        }
        return $code;
    }

    /**
     * Callback to autolink a URL (with shortening)
     */
    function _format_link($match){
        $url = $match[1];
        str_replace("\\\\'","'",$url);
        if(strlen($url) > 40){
            $title = substr($url,0,30).' … '.substr($url,-10);
        }else{
            $title = $url;
        }
        $link = '<a href="'.$url.'" '.$this->target.' rel="nofollow">'.$title.'</a>';
        return $link;
    }

    /**
     * Join multiple wav files
     *
     * All wave files need to have the same format and need to be uncompressed.
     * The headers of the last file will be used (with recalculated datasize
     * of course)
     *
     * @link http://ccrma.stanford.edu/CCRMA/Courses/422/projects/WaveFormat/
     * @link http://www.thescripts.com/forum/thread3770.html
     * @link http://www.splitbrain.org/blog/2006-11/15-joining_wavs_with_php
     */
    function _joinwavs($wavs){
        $fields = join('/',array( 'H8ChunkID', 'VChunkSize', 'H8Format',
                                  'H8Subchunk1ID', 'VSubchunk1Size',
                                  'vAudioFormat', 'vNumChannels', 'VSampleRate',
                                  'VByteRate', 'vBlockAlign', 'vBitsPerSample' ));

        $data = '';
        foreach($wavs as $wav){
            $fp     = fopen($wav,'rb');
            $header = fread($fp,36);
            $info   = unpack($fields,$header);

            // read optional extra stuff
            if($info['Subchunk1Size'] > 16){
                $header .= fread($fp,($info['Subchunk1Size']-16));
            }

            // read SubChunk2ID
            $header .= fread($fp,4);

            // read Subchunk2Size
            $size  = unpack('vsize',fread($fp, 4));
            $size  = $size['size'];

            // read data
            $data .= fread($fp,$size);
        }

        return $header.pack('V',strlen($data)).$data;
    }


    /**
     * Prints the form tags for admin
     */
    function _admin_opts($id){
        if(!$_REQUEST[MTC]['admin']) return;
        echo '<div class="'.MTC.'_admform">';
        echo '<form action="#'.MTC.'_form" method="post" accept-charset="utf-8">';
        echo '<input type="hidden" name="'.MTC.'[do]" value="del" style="display:none" />';
        echo '<input type="hidden" name="'.MTC.'
" value="'.htmlspecialchars($this->page).'" style="display:none" />';
        echo '<input type="hidden" name="'.MTC.'[id]" value="'.$id.'" style="display:none" />';

        echo '<label for="'.MTC.'_admpass">Admin Password:</label>';
        echo '<input type="password" name="'.MTC.'[admpass]" value="" id="'.MTC.'_admpass" />';

        echo '<input type="submit" value="Delete" />';
        echo '</form>';
        echo '</div>';
    }

    /**
     * Does the work for deleting a comment
     */
    function _del_comment(){
        $page    = trim($_POST[MTC]['page']);
        $id      = trim($_POST[MTC]['id']);
        $admpass = $_POST[MTC]['admpass'];

        if(! ($page && $id && $admpass) ){
            $this->message .= 'Sorry, missing parameters! Admin password given?';
            return;
        }

        if($this->adminpass != $admpass){
            $this->message .= 'Sorry, wrong password.';
            return;
        }

        $page = md5($page);
        $id   = addslashes($id);
        $sql = "DELETE FROM mtc_comments
                      WHERE page = '$page'
                        AND id = '$id'";

        $handle = $this->_get_dbhandle();
        if(!$handle) return;
        mysql_query($sql,$handle);

        $this->message = 'Comment deleted';
    }

    /**
     * Does the work for adding a comment
     */
    function _add_comment(){
        $page = trim($_POST[MTC]['page']);
        $name = trim($_POST[MTC]['name']);
        $mail = trim($_POST[MTC]['mail']);
        $web  = trim($_POST[MTC]['web']);
        $text = trim($_POST[MTC]['text']);
        $cptc = trim($_POST[MTC]['captcha']);
        $code = trim($_POST[MTC]['code']);

        if(! ($page && $name && $mail && $text) ){
            $this->message .= $this->lang['nofield'];
            return;
        }

        if($this->captcha){
            if(!$cptc || !$code ||
               (strtoupper($cptc) != strtoupper($this->x_Decrypt($code,$this->secret)))
              ){
                $this->message .= $this->lang['nocaptcha'];
                return;
            }
        }else{
            $code = $this->_gen_rand();
        }

        if($web && !preg_match('=https?://=i',$web)){
            $this->message .= $this->lang['noweb'];
            return;
        }

        if(!$this->_isvalid_mail($mail)){
            $this->message .= $this->lang['noemail'];
            return;
        }

        if($this->_check_blacklist($text)){
            $this->message .= $this->lang['nospam'];
            return;
        }

        $ip   = $_SERVER['REMOTE_ADDR'];
        $this->_mail($page,$name,$mail,$text,$ip,$_SERVER['PHP_SELF']);

        $url  = addslashes($page);
        $page = md5($page);
        $name = addslashes($name);
        $mail = addslashes($mail);
        $web  = addslashes($web);
        $text = addslashes($text);
        $ip   = addslashes($ip);
        $code = addslashes($code);

        $sql = "INSERT IGNORE INTO mtc_comments
                        SET page = '$page',
                            name = '$name',
                            mail = '$mail',
                            web  = '$web',
                            text = '$text',
                            date = NOW(),
                            ip = '$ip',
                            url  = '$url',
                            captcha = MD5('$code')";

        $handle = $this->_get_dbhandle();
        if(!$handle) return;
        mysql_query($sql,$handle);

        // clear form
        $_POST[MTC]['page'] = '';
        $_POST[MTC]['name'] = '';
        $_POST[MTC]['mail'] = '';
        $_POST[MTC]['web']  = '';
        $_POST[MTC]['text'] = '';
    }

    /**
     * If the notify property is set this function will send a
     * mail for each comment created.
     */
    function _mail($page,$name,$mail,$text,$ip,$url){
        if(!$this->notify) return;

        $body  = "The following comment was added:\n\n";
        $body .= "Name: $name\n";
        $body .= "Mail: $mail\n";
        $body .= "Date: ".date('r')."\n";
        $body .= "IP  : $ip\n";
        $body .= "Page: $page\n";
        $body .= "URL : http://".$_SERVER['HTTP_HOST'].$url."\n\n";
        $body .= $text;

        $body = base64_encode($body);

        $header  = "MIME-Version: 1.0\n";
        $header .= "Content-Type: text/plain; charset=UTF-8\n";
        $header .= "Content-Transfer-Encoding: base64";

        $subject = '['.MTC.'] New comment added';

        mail($this->notify,$subject,$body,$header);
    }

    /**
     * Output a message if one is set
     */
    function _print_message(){
        if(!$this->message) return;
        print '<div class="'.MTC.'_message">';
        print htmlspecialchars($this->message);
        print '</div>';
    }

    /**
     * Connect to the database and return a handle
     */
    function _get_dbhandle(){
        if($this->link) return $this->link;

        $this->link = @mysql_connect($this->db_host, $this->db_user, $this->db_pass);
        if(!$this->link){
            $this->message .= 'Could not connect to database: '.mysql_error();
            return false;
        }

        if(!@mysql_select_db($this->db_name)){
            $this->message .= 'Could not select database';
            return false;
        }

        return $this->link;
    }

    /**
     * Uses a regular expresion to check if a given mail address is valid
     *
     * May not be completly RFC conform!
     *
     * @link    http://www.webmasterworld.com/forum88/135.htm
     *
     * @param   string $email the address to check
     * @return  bool          true if address is valid
     */
    function _isvalid_mail($email){
        return eregi("^[0-9a-z]([+-_.]?[0-9a-z])*@[0-9a-z]([-.]?[0-9a-z])*\\.[a-z]{2,4}$", $email);
    }


    /**
     * Spamcheck against wordlist
     *
     * Checks the wikitext against a list of blocked expressions
     * returns true if the text contains any bad words
     *
     * @author Andreas Gohr <[email protected]>
     */
    function _check_blacklist($text){
        if(!@file_exists($this->blacklist)) return false;
        $blockfile = file($this->blacklist);
        //how many lines to read at once (to work around some PCRE limits)
        if(version_compare(phpversion(),'4.3.0','<')){
            //old versions of PCRE define a maximum of parenthesises even if no
            //backreferences are used - the maximum is 99
            //this is very bad performancewise and may even be too high still
            $chunksize = 40;
        }else{
            //read file in chunks of 600 - this should work around the
            //MAX_PATTERN_SIZE in modern PCRE
            $chunksize = 200;
        }
        while($blocks = array_splice($blockfile,0,$chunksize)){
            $re = array();
            #build regexp from blocks
            foreach($blocks as $block){
                $block = preg_replace('/#.*$/','',$block);
                $block = trim($block);
                if(empty($block)) continue;
                $re[]  = $block;
            }
            if(preg_match('#('.join('|',$re).')#si',$text)) return true;
        }
        return false;
    }

    /**
     * remove magic quotes recursivly
     *
     * @author Andreas Gohr <[email protected]>
     */
    function _remove_magic_quotes(&$array) {
        if(!is_array($array)) return;
        foreach (array_keys($array) as $key) {
            if (is_array($array[$key])) {
                remove_magic_quotes($array[$key]);
            }else {
                $array[$key] = stripslashes($array[$key]);
            }
        }
    }


    /**
     * Simple XOR encryption
     *
     * @author Dustin Schneider
     * @link http://www.phpbuilder.com/tips/item.php?id=68
     */
    function x_Encrypt($string, $key){
        for($i=0; $i<strlen($string); $i++){
            for($j=0; $j<strlen($key); $j++){
                $string[$i] = $string[$i]^$key[$j];
            }
        }
        return $string;
    }

    /**
     * Simple XOR decryption
     *
     * @author Dustin Schneider
     * @link http://www.phpbuilder.com/tips/item.php?id=68
     */
    function x_Decrypt($string, $key){
        for($i=0; $i<strlen($string); $i++){
            for($j=0; $j<strlen($key); $j++){
                $string[$i] = $key[$j]^$string[$i];
            }
        }
        return $string;
    }
}

/**
* Main
*/

if($_REQUEST['MTC']['do'] == 'captcha'){
    $mtc = new MTC();
    $mtc->captcha_image();
}elseif($_REQUEST['MTC']['do'] == 'audio'){
    $mtc = new MTC();
    $mtc->captcha_audio();
}

//Setup VIM: ex: et ts=4 enc=utf-8 :
?>


page1.php

<?php
session_start();
?>

<table border="0" width="65%" style="border:1px solid #68B6DF">
				                  <tr>
						                <td>
						                      <?php 
												    require_once("mtc/mtc.class.php");
												    $MTC = new MTC();
												    $MTC->audio = true;
											  ?>
												<?php $MTC->comment_form(); ?>
												<?php echo $code=$_SESSION['cap'] ?>

												   </td>
				            	</tr>
			               </table>

Link to comment
https://forums.phpfreaks.com/topic/98134-captcha/
Share on other sites
ansarka Newbie

ansarka

Posted
Posted

change this code to

 

/**
     * Generate a 5 char random code
     */
    function _gen_rand(){
        $code = '';
        for($i=0;$i<5;$i++){
            $code .= chr(rand(65, 90));
        }
        return $code;
    }

 

change the to any number you want to have

Link to comment
https://forums.phpfreaks.com/topic/98134-captcha/#findComment-502012
Share on other sites
This thread is more than a year old. Please don't revive it unless you have something important to add.

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
 Share
Go to topic listing
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.