Hi,
Are you tired of receiving spam messages from your contact forms or unwanted posts, robot accounts on your membership website? If yes, the solution is to create a php security image called captcha. That’s the best solution to secure your web forms, etc. For creating a captcha security code you need to have GD-library installed and active on your webhost, but, most of the shared webhosts have this library installed. Here is the captcha code :
<?php //The first step is to start a php session calling the special function session_start(); //The seccond step is to generate a string randomly using rand function //I'll choose to get a random number 6 numbers in length $randomcode = rand(0, 999999); //Now we need a background image to write the random number to it $captchafromimage = imagecreatefrompng("captcha.png"); //Setting font color $color = ImageColorAllocate ($captchafromimage, 50, 50, 50); //Ta da, here we are, writing the random generated code to the image imagestring($captchafromimage, 6, 50, 2, $randomcode, $color); //Now the random number is coded into md5 secure format //and stored it into a session name to be able to validate //it in the future $_SESSION['randomcode'] = md5($randomcode); //Set up headers header("Content-type: image/png"); //Finally, let's show up the captcha image generated imagepng($captchafromimage); ?>
You will need a background PNG image which you can download here (right click -> Save as)
Here is the captcha result :
