captcha.php ➔ displayToken() - Code Metrics - Inspection of "php-cs-fixer: spaces around operators" - pradosoft/prado - Measure and Improve Code Quality continuously with Scrutinizer

Passed
Branch — php-cs-fixer (b9836a)

by Fabio
created 2018-02-17 17:18 UTC
captcha.php ➔ displayToken() B

↳ Parent: Project
Complexity

Conditions	6
Paths	24
Size

Total Lines	46
Code Lines	36
Duplication

Lines	0
Ratio	0 %
Importance

Changes
Metric	Value
cc	6
eloc	36
nc	24
nop	3
dl	0
loc	46
rs	8.4751
c	0
b	0
f	0
<?php
/**
 * CAPTCHA generator script.
 *
 * @author Qiang Xue <[email protected]>
 * @link https://github.com/pradosoft/prado
 * @copyright Copyright &copy; 2005-2016 The PRADO Group
 * @license https://github.com/pradosoft/prado/blob/master/LICENSE
 * @package Prado\Web\UI\WebControls\assets
 */

namespace Prado\Web\UI\WebControls\assets;

define('THEME_OPAQUE_BACKGROUND', 0x0001);
define('THEME_NOISY_BACKGROUND', 0x0002);
define('THEME_HAS_GRID', 0x0004);
define('THEME_HAS_SCRIBBLE', 0x0008);
define('THEME_MORPH_BACKGROUND', 0x0010);
define('THEME_SHADOWED_TEXT', 0x0020);

require_once(dirname(__FILE__) . '/captcha_key.php');

$token = 'error';
$theme = 0;

if(isset($_GET['options']))
{
	$str = base64_decode($_GET['options']);
	if(strlen($str) > 32)
	{
		$hash = substr($str, 0, 32);
		$str = substr($str, 32);
		if(md5($privateKey . $str) === $hash)
		{
			$options = unserialize($str);
			$publicKey = $options['publicKey'];
			$tokenLength = $options['tokenLength'];
			$caseSensitive = $options['caseSensitive'];
			$alphabet = $options['alphabet'];
			$fontSize = $options['fontSize'];
			$theme = $options['theme'];
			if(($randomSeed = $options['randomSeed']) > 0)
				srand($randomSeed);
			else
				srand((int)(microtime() * 1000000));
			$token = generateToken($publicKey, $privateKey, $alphabet, $tokenLength, $caseSensitive);
		}
	}
}

displayToken($token, $fontSize, $theme);

function generateToken($publicKey, $privateKey, $alphabet, $tokenLength, $caseSensitive)
{
	$token = substr(hash2string(md5($publicKey . $privateKey), $alphabet) . hash2string(md5($privateKey . $publicKey), $alphabet), 0, $tokenLength);
	return $caseSensitive?$token:strtoupper($token);
}

function hash2string($hex, $alphabet)
{
	if(strlen($alphabet) < 2)
		$alphabet = '234578adefhijmnrtABDEFGHJLMNRT';
	$hexLength = strlen($hex);
	$base = strlen($alphabet);
	$result = '';
	for($i = 0;$i < $hexLength;$i += 6)
	{
		$number = hexdec(substr($hex, $i, 6));
		while($number)
		{
			$result .= $alphabet[$number % $base];
			$number = floor($number / $base);
		}
	}
	return $result;
}

function displayToken($token, $fontSize, $theme)
{
	if(($fontSize = (int)$fontSize) < 22)
		$fontSize = 22;
	if($fontSize > 100)
		$fontSize = 100;
	$length = strlen($token);
	$padding = 10;
	$fontWidth = $fontSize;
	$fontHeight = floor($fontWidth * 1.5);
	$width = $fontWidth * $length + $padding * 2;
	$height = $fontHeight;
	$image = imagecreatetruecolor($width, $height);
	$image = imagecreatetruecolor($width, /** @scrutinizer ignore-type */ $height);

	addBackground(
		$image, $width, $height,
		$theme & THEME_OPAQUE_BACKGROUND,
		$theme & THEME_NOISY_BACKGROUND,
		$theme & THEME_HAS_GRID,
		$theme & THEME_HAS_SCRIBBLE,
		$theme & THEME_MORPH_BACKGROUND
	);

	$font = dirname(__FILE__) . DIRECTORY_SEPARATOR . 'verase.ttf';

	if(function_exists('imagefilter'))
		imagefilter($image, IMG_FILTER_GAUSSIAN_BLUR);

	$hasShadow = ($theme & THEME_SHADOWED_TEXT);
	for($i = 0;$i < $length;$i++)
	{
		$color = imagecolorallocate($image, rand(150, 220), rand(150, 220), rand(150, 220));
		$size = rand($fontWidth - 10, $fontWidth);
		$angle = rand(-30, 30);
		$x = $padding + $i * $fontWidth;
		$y = rand($fontHeight - 15, $fontHeight - 10);
		imagettftext($image, $size, $angle, $x, $y, $color, $font, $token[$i]);
		if($hasShadow)
			imagettftext($image, $size, $angle, $x + 2, $y + 2, $color, $font, $token[$i]);
		imagecolordeallocate($image, $color);
	}

	header('Content-Type: image/png');
	imagepng($image);
	imagedestroy($image);
}

function addBackground($image, $width, $height, $opaque, $noisy, $hasGrid, $hasScribble, $morph)
{
	$background = imagecreatetruecolor($width * 2, $height * 2);
	$white = imagecolorallocate($background, 255, 255, 255);
	imagefill($background, 0, 0, $white);

	if($opaque)
		imagefill($background, 0, 0, imagecolorallocate($background, 100, 100, 100));

	if($noisy)
		addNoise($background, $width * 2, $height * 2);

	if($hasGrid)
		addGrid($background, $width * 2, $height * 2);

	if($hasScribble)
		addScribble($background, $width * 2, $height * 2);

	if($morph)
		morphImage($background, $width * 2, $height * 2);

	imagecopy($image, $background, 0, 0, 30, 30, $width, $height);

	if(!$opaque)
		imagecolortransparent($image, $white);
}

function addNoise($image, $width, $height)
{
	for($x = 0;$x < $width;++$x)
	{
		for($y = 0;$y < $height;++$y)
		{
			if(rand(0, 100) < 25)
			{
				$color = imagecolorallocate($image, rand(150, 220), rand(150, 220), rand(150, 220));
				imagesetpixel($image, $x, $y, $color);
				imagecolordeallocate($image, $color);
			}
		}
	}
}

function addGrid($image, $width, $height)
{
	for($i = 0;$i < $width;$i += rand(15, 25))
	{
		imagesetthickness($image, rand(2, 6));
		$color = imagecolorallocate($image, rand(100, 180), rand(100, 180), rand(100, 180));
		imageline($image, $i + rand(-10, 20), 0, $i + rand(-10, 20), $height, $color);
		imagecolordeallocate($image, $color);
	}
	for($i = 0;$i < $height;$i += rand(15, 25))
	{
		imagesetthickness($image, rand(2, 6));
		$color = imagecolorallocate($image, rand(100, 180), rand(100, 180), rand(100, 180));
		imageline($image, 0, $i + rand(-10, 20), $width, $i + rand(-10, 20), $color);
		imagecolordeallocate($image, $color);
	}
}

function addScribble($image, $width, $height)
function addScribble($image, /** @scrutinizer ignore-unused */ $width, $height)
{
	for($i = 0;$i < 8;$i++)
	{
		$color = imagecolorallocate($image, rand(100, 180), rand(100, 180), rand(100, 180));
		$points = [];
		for($j = 1;$j < rand(5, 10);$j++)
		{
			$points[] = rand(2 * (20 * ($i + 1)), 2 * (50 * ($i + 1)));
			$points[] = rand(30, $height + 30);
		}
		imagesetthickness($image, rand(2, 6));
		imagepolygon($image, $points, intval(count($points) / 2), $color);
		imagecolordeallocate($image, $color);
	}
}

function morphImage($image, $width, $height)
{
	$tempImage = imagecreatetruecolor($width, $height);
	$chunk = rand(1, 5);

	for($x = $y = 0;$x < $width;$x += $chunk)
	{
		$chunk = rand(1, 5);
		$y += rand(-1, 1);
		if($y >= $height)	$y = $height - 5;
		if($y < 0) $y = 5;
		imagecopy($tempImage, $image, $x, 0, $x, $y, $chunk, $height);
	}
	for($x = $y = 0;$y < $height;$y += $chunk)
	{
		$chunk = rand(1, 5);
		$x += rand(-1, 1);
		if($x >= $width)	$x = $width - 5;
		if($x < 0) $x = 5;
		imagecopy($image, $tempImage, $x, $y, 0, $y, $width, $chunk);
	}
}


pradosoft / prado

Branch — php-cs-fixer (b9836a)

captcha.php ➔ displayToken() B

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