php生成验证码类
直接看代码
<?php session_start(); class Code{ //资源 private $img; //画布宽度 private $width=100; //画布高度 private $height=30; //背景颜色 private $bgColor=‘#ffffff‘; //验证码 private $code; //验证码的随机种子 private $codeStr=‘23456789abcdefghjkmnpqrstuvwsyz‘; //验证码长度 private $codeLen=4; //验证码字体 private $font; //验证码字体大小 private $fontSize=16; //验证码字体颜色 private $fontColor=‘‘; public function __construct() { } //创建验证码 public function make() { if(empty($this->font)) { $this->font = base_path().‘\public\out\consola.ttf‘; } $this->create();//生成验证码 header("Content-type:image/png"); imagepng($this->img); imagedestroy($this->img); exit; } //设置字体文件 public function font($font) { $this->font= $font; return $this; } //设置文字大小 public function fontSize($fontSize) { $this->fontSize=$fontSize; return $this; } //设置字体颜色 public function fontColor($fontColor) { $this->fontColor = $fontColor; return $this; } //验证码数量 public function num($num) { $this->codeLen=$num; return $this; } //设置宽度 public function width($width) { $this->width = $width; return $this; } //设置高度 public function height($height) { $this->height = $height; return $this; } //设置背景颜色 public function background($color) { $this->bgColor = $color; return $this; } //返回验证码 public function get() { return $_SESSION[‘code‘]; } //生成验证码 private function createCode() { $code = ‘‘; for ($i = 0; $i < $this->codeLen; $i++) { $code .= $this->codeStr [mt_rand(0, strlen($this->codeStr) - 1)]; } $this->code = strtoupper($code); $_SESSION[‘code‘] = $this->code; } //建画布 private function create() { if (!$this->checkGD()) return false; $w = $this->width; $h = $this->height; $bgColor = $this->bgColor; $img = imagecreatetruecolor($w, $h); $bgColor = imagecolorallocate($img, hexdec(substr($bgColor, 1, 2)), hexdec(substr($bgColor, 3, 2)), hexdec(substr($bgColor, 5, 2))); imagefill($img, 0, 0, $bgColor); $this->img = $img; $this->createLine(); $this->createFont(); $this->createPix(); $this->createRec(); } //画线 private function createLine(){ $w = $this->width; $h = $this->height; $line_color = "#dcdcdc"; $color = imagecolorallocate($this->img, hexdec(substr($line_color, 1, 2)), hexdec(substr($line_color, 3, 2)), hexdec(substr($line_color, 5, 2))); $l = $h/5; for($i=1;$i<$l;$i++){ $step =$i*5; imageline($this->img, 0, $step, $w,$step, $color); } $l= $w/10; for($i=1;$i<$l;$i++){ $step =$i*10; imageline($this->img, $step, 0, $step,$h, $color); } } //画矩形边框 private function createRec() { //imagerectangle($this->img, 0, 0, $this->width - 1, $this->height - 1, $this->fontColor); } //写入验证码文字 private function createFont() { $this->createCode(); $color = $this->fontColor; if (!empty($color)) { $fontColor = imagecolorallocate($this->img, hexdec(substr($color, 1, 2)), hexdec(substr($color, 3, 2)), hexdec(substr($color, 5, 2))); } $x = ($this->width - 10) / $this->codeLen; for ($i = 0; $i < $this->codeLen; $i++) { if (empty($color)) { $fontColor = imagecolorallocate($this->img, mt_rand(50, 155), mt_rand(50, 155), mt_rand(50, 155)); } imagettftext($this->img, $this->fontSize, mt_rand(- 30, 30), $x * $i + mt_rand(6, 10), mt_rand($this->height / 1.3, $this->height - 5), $fontColor, $this->font, $this->code [$i]); } $this->fontColor = $fontColor; } //画线 private function createPix() { $pix_color = $this->fontColor; for ($i = 0; $i < 50; $i++) { imagesetpixel($this->img, mt_rand(0, $this->width), mt_rand(0, $this->height), $pix_color); } for ($i = 0; $i < 2; $i++) { imageline($this->img, mt_rand(0, $this->width), mt_rand(0, $this->height), mt_rand(0, $this->width), mt_rand(0, $this->height), $pix_color); } //画圆弧 for ($i = 0; $i < 1; $i++) { // 设置画线宽度 imagearc($this->img, mt_rand(0, $this->width), mt_rand(0, $this->height), mt_rand(0, $this->width), mt_rand(0, $this->height) , mt_rand(0, 160), mt_rand(0, 200), $pix_color); } imagesetthickness($this->img, 1); } //验证GD库 private function checkGD() { return extension_loaded(‘gd‘) && function_exists("imagepng"); } }
原文地址:https://www.cnblogs.com/crazytata/p/10171414.html
时间: 2024-11-10 15:40:24