PHP 輸出session 驗證碼與圖片不同步，圖片總是快一步，求解！解決方案

PHP 輸出session 驗證碼與圖片不同步，圖片總是快一步，求解！
PHP 輸出session 驗證碼與圖片不同步，圖片總是快一步，求解！

PHP code

PHP code

------解決方案--------------------
這個問題很詭異，最好的方法就是分開。
試試這個吧
checkcode.class.php

PHP code

doimage(); * //取得驗證 * $_SESSION['code']=$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 {    //驗證碼的寬度    public $width=130;        //驗證碼的高    public $height=50;        //設定字型的地址    private $font;        //設定字型色    public $font_color;        //設定隨機產生因子    public $charset = 'abcdefghkmnprstuvwyzABCDEFGHKLMNPRSTUVWYZ23456789';        //設定背景色    public $background = '#EDF7FF';        //產生驗證碼字元數    public $code_len = 4;        //字型大小    public $font_size = 20;        //驗證碼    private $code;        //圖片記憶體    private $img;        //文字X軸開始的地方    private $x_start;            function __construct($fontpath) {        $this->font =$fontpath;    }    /**     * 產生隨機驗證碼。     */    protected function creat_code() {        $code = '';        $charset_len = strlen($this->charset)-1;        for ($i=0; $i<$this->code_len; $i++) {            $code .= $this->charset[rand(1, $charset_len)];        }        $this->code = $code;    }        /**     * 擷取驗證碼     */    public function get_code() {        return strtolower($this->code);    }        /**     * 產生圖片     */    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)));        }        //設定背景色        $background = imagecolorallocate($this->img,hexdec(substr($this->background, 1,2)),hexdec(substr($this->background, 3,2)),hexdec(substr($this->background, 5,2)));        //畫一個櫃形，設定背景顏色。        imagefilledrectangle($this->img,0, $this->height, $this->width, 0, $background);        $this->creat_font();        $this->creat_line();        $this->output();    }        /**     * 產生文字     */    private function creat_font() {        $x = $this->width/$this->code_len;        for ($i=0; $i<$this->code_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;        }    }        /**     * 畫線     */    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, $this->font_color);    }        /**     * 輸出圖片     */    private function output() {        header("content-type:image/png\r\n");        imagepng($this->img);        imagedestroy($this->img);    }}
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