sigmasternchen/PHPTools
1
0
Fork 0
mirror of https://github.com/sigmasternchen/PHPTools synced 2025-03-15 07:48:55 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

added captcha

Browse source
This commit is contained in:
overflowerror 2014-02-26 19:02:06 +01:00
parent d831df064b
commit 912e441bb9
1 changed files with 104 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

104
images/captcha.png/index.php Normal file
View file

@ -0,0 +1,104 @@
<?php
@session_start();
$letters = "ABCDEFGHIJKLMNOPQRSTUVWgqrtimnaeh";
$length = 8;
$fontsize = 30;
$offset = 10;
$fieldWidth = 50;
$margin = $offset + 5;
$imagesize = array();
$imagesize['x'] = $fieldWidth * $length + 2 * $margin;
$imagesize['y'] = 80;
$fonts = array();
// add your fonts here
//$fonts[] = "/data/fonts/averia.ttf";
//$fonts[] = "/data/fonts/bbc.ttf";
//$fonts[] = "/data/fonts/bybsy.ttf";
//$fonts[] = "/data/fonts/gtw.ttf";
//$fonts[] = "/data/fonts/newscycle.ttf";
$numberOfBackgroundLines = 50;
$thicknesOfBackgroundLines = 2;
$numberOfFrontLines = 2;
$thicknesOfFrontLines = 3;
$captcha = array();
for ($i = 0; $i < $length; $i++) {
$random = rand(0, strlen($letters) - 1);
$captcha[$i] = substr($letters, $random, 1);
}
$rotations = array();
for ($i = 0; $i < $length; $i++) {
$random = rand(- $offset, $offset);
$rotations[$i] = $random;
}
$positions = array();
for ($i = 0; $i < $length; $i++) {
$random = rand(- $offset, $offset);
$positions[$i] = array();
$positions[$i]['x'] = $random;
$random = rand(- $offset, $offset);
$positions[$i]['y'] = $random;
}
$lines = array();
for ($i = 0; $i < $numberOfBackgroundLines; $i++) {
$lines[$i] = array();
$lines[$i][0] = rand(0, $imagesize['x']);
$lines[$i][1] = rand(0, $imagesize['y']);
$lines[$i][2] = rand(0, $imagesize['x']);
$lines[$i][3] = rand(0, $imagesize['y']);
$lines[$i][4] = $thicknesOfBackgroundLines;
}
for ($i = $numberOfBackgroundLines; $i < $numberOfBackgroundLines + $numberOfFrontLines; $i++) {
$lines[$i] = array();
$lines[$i][0] = rand(0, $imagesize['x']);
$lines[$i][1] = rand(0, $imagesize['y']);
$lines[$i][2] = rand(0, $imagesize['x']);
$lines[$i][3] = rand(0, $imagesize['y']);
$lines[$i][4] = $thicknesOfFrontLines;
}
$font = $_SERVER['DOCUMENT_ROOT'] . $fonts[rand(0, count($fonts) - 1)];
$image = imagecreatetruecolor($imagesize['x'], $imagesize['y']);
for ($i = 0; $i < $numberOfBackgroundLines; $i++) {
imagesetthickness($image, $lines[$i][4]);
$random = rand(0, 128);
$color = imagecolorallocate($image, $random, 127 - $random, $random);
imageline($image, $lines[$i][0], $lines[$i][1], $lines[$i][2], $lines[$i][3], $color);
}
$random = rand(0, 255);
$fontColor = imagecolorallocate($image, $random, 255, 255 - $random);
for ($i = 0; $i < $length; $i++) {
imagettftext($image, $fontsize, $rotations[$i], $offset + $i * $fieldWidth + $positions[$i]['x'], $imagesize['y'] - $fontsize / 2 + $positions[$i]['y'], $fontColor, $font, $captcha[$i]);
}
for ($i = $numberOfBackgroundLines; $i < $numberOfBackgroundLines + $numberOfFrontLines; $i++) {
imagesetthickness($image, $lines[$i][4]);
$random = rand(0, 128);
$color = imagecolorallocate($image, $random, 127 - $random, $random);
imageline($image, $lines[$i][0], $lines[$i][1], $lines[$i][2], $lines[$i][3], $color);
}
// Note: only one captcha code at a time can be used
$_SESSION['captcha'] = array();
$_SESSION['captcha']['code'] = $captcha;
$_SESSION['captcha']['time'] = time();
$_SESSION['captcha']['used'] = false;
header( "Content-type: image/png" );
imagepng($image);
imagedestroy($image);
?>