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產生圖片隨機字串_php实例

时间:2021-07-01 10:21:17 帮助过:1人阅读

$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<$words;$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);
?>

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