產生圖片隨機字串

2018-09-07 12:46

阅读:453

  <?php
$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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