This is the simplest picture verification code:
image.php
header("Content-type: image/png"); $string = "abcdefghijklmnopqrstuvwxyz0123456789"; for($i=0;$i<6; $i++){ $pos = rand(0,36); $str .= $string{$pos}; } $img_handle = ImageCreate (60, 20) or die ("Cannot Create image"); //Image size (x,y) $back_color = ImageColorAllocate($img_handle, 255, 255, 255); //Background color RBG $txt_color = ImageColorAllocate($img_handle, 0, 0, 0); / /Text Color RBG ImageString($img_handle, 31, 5, 0, $str, $txt_color); Imagepng($img_handle); session_start(); $_SESSION['img_number'] = $str; ? > Copy code
form.php
php implements simple image verification code
more0
php
Verification code
This is the simplest image verification code:
image.php
header( "Content-type: image/png"); $string = "abcdefghijklmnopqrstuvwxyz0123456789"; for($i=0;$i<6;$i++){ $pos = rand(0,36); $str .= $string{$pos}; } $img_handle = ImageCreate (60, 20) or die ("Cannot Create image"); //Image size (x,y) $back_color = ImageColorAllocate($img_handle , 255, 255, 255); //Background color RBG $txt_color = ImageColorAllocate($img_handle, 0, 0, 0); //Text Color RBG ImageString($img_handle, 31, 5, 0, $str , $txt_color); Imagepng($img_handle); session_start(); $_SESSION['img_number'] = $str; ?>
form.php
< input type="submit" name="submit" value="Check">
Copy code
result.php
session_start();
if($_SESSION['img_number'] != $_POST['num']){
echo 'The number you entered doesn' t match the image.
Try Again
}else{
echo'The numbers Match!
Try Again
}
?>
Copy code
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
