PHP 输出session 验证码与图片不同步,图片总是快一步,求解!解决方案
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2022-04-14 18:06:09
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PHP 输出session 验证码与图片不同步,图片总是快一步,求解!
PHP 输出session 验证码与图片不同步,图片总是快一步,求解!
------解决方案--------------------
这个问题很诡异,最好的方法就是分开。
试试这个吧
checkcode.class.php
PHP 输出session 验证码与图片不同步,图片总是快一步,求解!
- PHP code
- PHP code
------解决方案--------------------
这个问题很诡异,最好的方法就是分开。
试试这个吧
checkcode.class.php
- PHP code
doimage(); * //取得验证 * $_SESSION['code']=$checkcode->get_code(); session_start(); include './checkcode.class.php'; $checkcode = new checkcode('C:\WINDOWS\Fonts\ARIAL.TTF'); $checkcode->doimage(); $_SESSION['code']=$checkcode->get_code(); */class checkcode { //验证码的宽度 public $width=130; //验证码的高 public $height=50; //设置字体的地址 private $font; //设置字体色 public $font_color; //设置随机生成因子 public $charset = 'abcdefghkmnprstuvwyzABCDEFGHKLMNPRSTUVWYZ23456789'; //设置背景色 public $background = '#EDF7FF'; //生成验证码字符数 public $code_len = 4; //字体大小 public $font_size = 20; //验证码 private $code; //图片内存 private $img; //文字X轴开始的地方 private $x_start; function __construct($fontpath) { $this->font =$fontpath; } /** * 生成随机验证码。 */ protected function creat_code() { $code = ''; $charset_len = strlen($this->charset)-1; for ($i=0; $icode_len; $i++) { $code .= $this->charset[rand(1, $charset_len)]; } $this->code = $code; } /** * 获取验证码 */ public function get_code() { return strtolower($this->code); } /** * 生成图片 */ public function doimage() { $code = $this->creat_code(); $this->img = imagecreatetruecolor($this->width, $this->height); if (!$this->font_color) { $this->font_color = imagecolorallocate($this->img, rand(0,156), rand(0,156), rand(0,156)); } else { $this->font_color = imagecolorallocate($this->img, hexdec(substr($this->font_color, 1,2)), hexdec(substr($this->font_color, 3,2)), hexdec(substr($this->font_color, 5,2))); } //设置背景色 $background = imagecolorallocate($this->img,hexdec(substr($this->background, 1,2)),hexdec(substr($this->background, 3,2)),hexdec(substr($this->background, 5,2))); //画一个柜形,设置背景颜色。 imagefilledrectangle($this->img,0, $this->height, $this->width, 0, $background); $this->creat_font(); $this->creat_line(); $this->output(); } /** * 生成文字 */ private function creat_font() { $x = $this->width/$this->code_len; for ($i=0; $icode_len; $i++) { imagettftext($this->img, $this->font_size, rand(-30,30), $x*$i+rand(0,5), $this->height/1.4, $this->font_color, $this->font, $this->code[$i]); if($i==0)$this->x_start=$x*$i+5; } } /** * 画线 */ private function creat_line() { imagesetthickness($this->img, 3); $xpos = ($this->font_size * 2) + rand(-5, 5); $width = $this->width / 2.66 + rand(3, 10); $height = $this->font_size * 2.14; if ( rand(0,100) % 2 == 0 ) { $start = rand(0,66); $ypos = $this->height / 2 - rand(10, 30); $xpos += rand(5, 15); } else { $start = rand(180, 246); $ypos = $this->height / 2 + rand(10, 30); } $end = $start + rand(75, 110); imagearc($this->img, $xpos, $ypos, $width, $height, $start, $end, $this->font_color); if ( rand(1,75) % 2 == 0 ) { $start = rand(45, 111); $ypos = $this->height / 2 - rand(10, 30); $xpos += rand(5, 15); } else { $start = rand(200, 250); $ypos = $this->height / 2 + rand(10, 30); } $end = $start + rand(75, 100); imagearc($this->img, $this->width * .75, $ypos, $width, $height, $start, $end, $this->font_color); } /** * 输出图片 */ private function output() { header("content-type:image/png\r\n"); imagepng($this->img); imagedestroy($this->img); }}相关文章
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