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產生圖片隨機字串_PHP教程

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2016-07-21 15:58:44875browse

$base = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';  
$words = 5;  
$rand_top = strlen($base) - 1;  
$string = '';  
header("Content-type: image/png");  
$im = imagecreate($words*16, $words*5);  
$black = imagecolorallocate($im, 90, 60, 120);  
$white = imagecolorallocate($im, 255, 255, 255);  
for($i=0;$i  $idx = mt_rand(0, $rand_top);  
  imagestring($im, 3, $i*15+2, mt_rand(0, $words*2), $base[$idx], $white);  
}  
imagepng($im);  
imagedestroy($im);  
?>

www.bkjia.comtruehttp://www.bkjia.com/PHPjc/317488.htmlTechArticle?php $base='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'; $words=5; $rand_top=strlen($base)-1; $string=''; header("Content-type:image/png"); $im=imagecreate($word...
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