80 lines
2.6 KiB
PHP
80 lines
2.6 KiB
PHP
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<?php
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namespace app\common\util;
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class VeriCode
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{
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private static function _getCodeConfig(){
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return[
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// '验证码字符集'
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'codeStr' =>'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890',
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//验证码格式
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'codeCount'=>4,
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//字体大小
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'fontsize'=>16,
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//验证码宽度
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'width'=>100,
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//验证码高度
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'height'=>36,
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//是否有干扰点？true有，false没有
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'disturbPoint'=>true,
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//干扰点格式disturbPoint开启后生效
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'pointCount'=>200,
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//是否有干扰条？true有，false没有
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'disturbLine'=>ture,
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//干扰条个数，disturbLine开启后生效
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'lineCount'=>3
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];
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}
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public static function create(){
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//配置
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$config = self::_getCodeConfig();
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//创建花呗
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$image= imagecreatetruecolor($config['width'], $config['height']);
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//背景颜色
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$bgcolor=imagecolorallocate($image, 255,255,255);
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imagefill($image, 0, 0, $bgcolor);
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$captch_code = '';
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$captchCodeArr = str_split($config['codeStr']);
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//随机获取n个候选字符
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for($i=0; $i<$config['codeCount']; $i++){
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$fontSize = $config['fontSize'];
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$fontColor = imagecolorallocate($image, rand(0,120), rand(0,120), rand(0,120));
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$fontContent = $captchCodeArr[rand(0, strlen($config['codeStr']) - 1)];
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$captch_code .= $fontContent;
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$_x = $config['width']/$config['codeCount'];
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$x = ($i*(int)$_x) + rand(5, 10);//随机坐标
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$y = rand(5, 10);
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imagestring($image, $fontSize, $x, $y, $fontContent, $fontColor);
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}
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session_start();
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$_SESSION['code'] = $captch_code;
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//增加干扰点
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if($config['disturbPoint']){
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for ($i=0; $i<$config['pointCount']; $i++){
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$pointColor = imagecolorallocate($image, rand(50, 200), rand(50, 200), rand(50, 200));
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imagesetpixel($image, rand(1, 99), rand(1, 99), $pointColor);
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}
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}
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//增加干扰线
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if ($config['disturbLine']){
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for ($i=0; $i<$config['lineCount']; $i++){
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$lineColor = imagecolorallocate($image, rand(80, 280), rand(80, 220), rand(80, 220));
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imageline($image, rand(1, 99), rand(1, 99), rand(1, 99),rand(1, 99), $lineColor);
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}
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}
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//输出格式
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header('content-type:image/png');
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imagepng($image);
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//销毁图片
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imagedestroy($image);
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}
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}
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