Captcha is a good way to avoid automatic form submission.In this tutorial i explains about captcha image verification. It create a image with a random string displayed on it. Then the user ask to fill the string in the form filed and once form submitted it checks if the string on image matches the input by the user . This ia easiest way to protect web form from spammers.
Captcha.php
This file create an image with random string displayed on it.
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<?php session_start(); $text = rand(10000,99999); $_SESSION["vercode"] = $text; $height = 25; $width = 65; $image_p = imagecreate($width, $height); $black = imagecolorallocate($image_p, 0, 0, 0); $white = imagecolorallocate($image_p, 255, 255, 255); $font_size = 14; imagestring($image_p, $font_size, 5, 5, $text, $white); imagejpeg($image_p, null, 80); ?> |
This script genrate a random number from 10000 to 99999 and assign it to a session variable $_SESSION[“vercode”]. then it generate a image 25*65 px with balck background and font size 14px. Now create a web form .
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<form name="captcha" method="post"> Name :<input type="text" name="name" required="required" /> Email :<input type="email" name="email" required="required" /> Verification code :<input type="text" name="vercode" size="10" required="required" /> <img src="captcha.php"> <input type="submit" name="submit" value="Submit" /> |
Now create php script for submitting the form
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<?php session_start(); if ($_POST["vercode"] != $_SESSION["vercode"] OR $_SESSION["vercode"]=='') { echo '<strong>Incorrect verification code.</strong>'; } else { // add form data processing code here echo '<strong>Verification successful.</strong>'; }; ?> |
This code check the verfication code input by user matches with sring given on image. if the code mataches then the form data submit else error message shows
Sir how to change banner image in car rental project
Snd code to change banner image in car rental project Sir plz
rshekarns@gmail.com
make change in css file
I’m not getting Sir wt to change in tht
Which one shld I change in ths sir…
location of css assests/css/style.css
in style.css make change in this line
background-image: url(“../images/banner-image.jpg”)
I did bt it’s not changing sir
press ctrl+F5
No nothing hpn
C my code once
9 hours ago
location of css assests/css/style.css
in style.css make change in this line
background-image: url(“../images/banner-image-1.jpg”)
Can you give me your remote connection
I didn’t get u sir
check your mailbox
617356535
Sir 617356535
Sir 617356535
Only I need to change image name right.. …