PHP development login registration complete code verification code program
Verification code program yanzhengma.php File
Here is the verification code program we use when logging in and registering. For the verification code program, please visit our verification code practice project
Note: When running the verification code program online, garbled characters will appear. You need to run it locally
<?php
session_start();
Header("Content-type:image/PNG");
$im = imagecreate(60, 25);
$back = imagecolorallocate($im, 245, 245, 245);
imagefill($im, 0, 0, $back);
$vcodes = "";
for($i = 0; $i < 4; $i++){
$font = imagecolorallocate($im, rand(100, 255), rand(0, 100), rand(100, 255));
$authnum = rand(0, 9);
$vcodes .= $authnum;
imagestring($im, 5, 9 + $i * 10, 5, $authnum, $font);
}
$_SESSION['VCODE'] = $vcodes;
for($i=0;$i<200;$i++) {
$randcolor = imagecolorallocate($im, rand(0, 255), rand(0, 255), rand(0, 255));
imagesetpixel($im, rand()%60, rand()%25, $randcolor); //
}
imagepng($im);
imagedestroy($im);
?>
