php生成隨機驗證碼
效果圖核心**:
<?php
/**簡單的驗證碼
* created by phpstorm.
* user: lenovo
* date: 2016/8/1
* time: 11:58
*/header("content-type: image/png");
for ($i=0;$i<4;$i++)
$im = imagecreatetruecolor(75,25);
$blue = imagecolorallocate($im,0,102,255);
$white = imagecolorallocate($im,255,255,255);
imagefill($im,0,0,$blue);
imagestring($im,5,20,4,$nmsg,$white);
ob_clean();
imagepng($im);
imagedestroy($im);
這裡需要注意下 ob_clean();如果我不加這一句的話 在火狐中 顯示..因其本身有錯無法顯示」的問題,提示了說「如果瀏覽器顯示「影象***因其本身有錯無法顯示」,在google瀏覽器直接顯示個空的。
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