8000 initialize · zerosdev/laravel-captcha@afd7c22 · GitHub
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initialize
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‎composer.json

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{
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"name": "zerosdev/laravel-captcha",
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"description": "Captcha Generator for Laravel Framework",
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"type": "library",
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"homepage": "https://zeros.co.id",
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"license": "MIT",
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"support": {
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"issues": "https://github.com/ZerosDev/laravel-captcha/issues",
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"source": "https://github.com/ZerosDev/laravel-captcha"
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},
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"authors": [
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{
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"name": "Zeros Technology",
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"email": "admin@zeros.co.id"
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}
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],
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"minimum-stability": "dev",
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"require": {
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"php": ">=5.6",
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"laravel/framework": ">=5.2"
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},
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"autoload": {
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"psr-4" : {
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"ZerosDev\\LaravelCaptcha\\": "src"
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}
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},
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"require-dev": {
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"phpunit/phpunit": "^7"
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}
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}

‎src/Captcha.php

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<?php
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namespace ZerosDev\LaravelCaptcha;
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use Exception;
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use Illuminate\Support\Facades\Session;
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use Illuminate\Support\HtmlString;
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class Captcha
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{
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/**
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* captcha id
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**/
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protected $id = null;
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/**
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* image buffer data
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**/
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protected $bufferData = null;
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/**
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* latest captcha session key
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**/
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protected $lastSessionKey = '';
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/**
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* default captcha image width (px)
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**/
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protected $width;
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/**
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* default captcha image height (px)
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**/
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protected $height;
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/**
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* captcha characters
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**/
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protected $chars;
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/**
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* default captcha length
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*/
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protected $captchaLength;
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/**
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* captcha session name
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*/
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protected $sessionName;
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/**
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* font name
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**/
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protected $font;
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/**
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*
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* Initializing captcha
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*
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* @return void
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*
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**/
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public function __construct()
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{
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$this->width = intval(config('captcha.width', 170));
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$this->height = intval(config('captcha.height', 50));
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$this->chars = config('captcha.chars', '123456789abcdefghjkmnpqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ');
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$this->captchaLength = intval(config('captcha.length', 6));
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$this->font = config('captcha.font', 'Arimo-Bold.ttf');
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$this->sessionName = config('captcha.session_name', 'captcha');
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$this->fontPath = dirname(__DIR__).'/storage/fonts/'.$this->font;
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# Check if font is exists
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if( !file_exists($this->fontPath) || !is_file($this->fontPath) ) {
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throw new Exception("Font {$this->fontPath} is not exists or can not be accessed. Kindly check the font file or directory/file permission");
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}
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# check if captcha length > 0
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if( $this->captchaLength < 1 ) {
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throw new Exception("Captcha length must be greater than 0");
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}
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# Start session if not started
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if( session_status() !== PHP_SESSION_ACTIVE )
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{
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if( !headers_sent() )
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{
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session_start();
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}
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else
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{
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throw new Exception("PHP session can not be started. Header already sent!");
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}
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}
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}
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/**
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*
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* Set the character list
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*
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* @param string of character $chars
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* @return \ZerosDev\LaravelCaptcha\Captcha
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*
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**/
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public function chars($chars)
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{
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$this->chars = $chars;
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return $this;
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}
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/**
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*
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* Set the length of captcha code
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*
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* @param Int $length
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* @return \ZerosDev\LaravelCaptcha\Captcha
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*
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**/
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public function length($length)
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{
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$this->captchaLength = intval($length);
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if( $this->captchaLength <= 0 ) {
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throw new Exception("Captcha length must be greater than 0");
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}
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return $this;
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}
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/**
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*
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* Set the size of captcha image
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*
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* @param integer $width
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* @param integer $height
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* @return \ZerosDev\LaravelCaptcha\Captcha
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*
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**/
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public function size($width, $height)
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{
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$this->width = intval($width);
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$this->height = intval($height);
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return $this;
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}
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/**
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*
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* Generating captcha
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*
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* @return \ZerosDev\LaravelCaptcha\Captcha
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*
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**/
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public function generate()
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{
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$image = imagecreatetruecolor($this->width, $this->height);
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$background_color = imagecolorallocate($image, 255, 255, 255);
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imagefilledrectangle($image, 0, 0, $this->width, $this->height, $background_color);
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$line_color = imagecolorallocate($image, 64, 64, 64);
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for($i=0; $i<10; $i++)
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{
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imageline($image, 0, rand()%$this->height, $this->width, rand()%$this->height, $line_color);
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}
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$pixel_color = imagecolorallocate($image, 0, 0, 255);
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for($i=0; $i<1000; $i++)
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{
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imagesetpixel($image, rand()%$this->width, rand()%$this->height, $pixel_color);
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}
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$len = strlen($this->chars);
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$text_color = imagecolorallocate($image, 0,0,0);
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$shadow_color = $grey = imagecolorallocate($image, 128, 128, 128);
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$word = '';
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$padding = 10;
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$spacing = (($this->width-$padding)/$this->captchaLength);
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for($i=0; $i<$this->captchaLength; $i++)
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{
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$angle = mt_rand(-4, 4) * mt_rand(1,4);
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$sizeStart = (($this->height/2)-3);
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$sizeEnd = (($this->height/2)+3);
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$font_size = mt_rand($sizeStart, $sizeEnd);
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$letter = $this->chars[mt_rand(0, $len-1)];
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$xCoordinate = $i == 0 ? $padding : ($i*$spacing)+$padding;
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$lineHeight = ($this->height/2) + ($font_size/2);
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imagettftext($image, $font_size, $angle, $xCoordinate, $lineHeight, $shadow_color, $this->font, $letter);
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imagettftext($image, $font_size, $angle, $xCoordinate, $lineHeight, $text_color, $this->font, $letter);
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$word .= $letter;
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}
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$word = str_replace(' ', '', $word);
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ob_start();
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imagepng($image);
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imagedestroy($image);
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$this->bufferData = ob_get_clean();
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$this->id = uniqid().time();
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$this->lastSessionKey = '_'.$this->id;
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$cd = Session::has($this->sessionName) ? json_decode(Session::get($this->sessionName), true) : [];
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if( count($cd) >= 20 )
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{
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Session::forget($this->sessionName);
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$cd = [];
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}
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$cd[$this->lastSessionKey] = $word;
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$sessionValue = json_encode($cd);
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Session::put($this->sessionName, $sessionValue);
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return $this;
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}
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/**
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*
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* Get captcha image
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*
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* @return string of generated base64 image
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*
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**/
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public function image()
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{
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return !empty($this->bufferData) ? 'data:image/png;base64, ' . base64_encode($this->bufferData) : null;
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}
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/**
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*
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* Get captcha id
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*
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* @return string of captcha generation id
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*
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**/
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public function id()
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{
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return !empty($this->id) ? $this->id : null;
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}
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/**
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*
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* Generate html hidden input
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*
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* @param Captcha ID $id
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*
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* @return html
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*
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**/
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public function form_field($captchaId = null, $elementId = 'captcha_id')
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{
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return HtmlString('<input type="hidden" id="'.$elementId.'" name="captcha_id" value="'.($captchaId ? $captchaId : $this->id).'">');
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}
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/**
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*
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* Creating html tag of captcha image
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*
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* @param HTML Attributes (array) $attributes
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*
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* @return html
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*
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**/
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public function html_image($attributes = [])
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{
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$html = '<img src="'.$this->image().'" ';
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foreach($attributes as $name => $value)
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{
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$html .= $name.'="'.$value.'" ';
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}
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$html .= '/>';
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return HtmlString($html);
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}
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/**
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*
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* Validating captcha
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*
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* @param Captcha ID $id
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* @param Captcha Code $captcha
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* @return boolean
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*
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**/
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public function validate($id, $captcha)
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{
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$cd = Session::has($this->sessionName) ? Session::get($this->sessionName) : null;
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if( !empty($cd) )
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{
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$list = json_decode($cd, true);
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$key = '_'.$id;
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if( isset($list[$key]) )
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{
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$result = hash_equals($list[$key], $captcha) ? true : false;
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if( $result )
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{
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unset($list[$key]);
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$sessionValue = json_encode($list);
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Session::put($this->sessionName, $sessionValue);
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}
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return $result;
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}
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}
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return false;
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}
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}

‎src/Facade.php

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<?php
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namespace ZerosDev\LaravelCaptcha;
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use Illuminate\Support\Facades\Facade as LaravelFacade;
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class Facade extends LaravelFacade
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{
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protected static function getFacadeAccessor()
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{
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return 'Captcha';
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}
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}

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