PHP 生成指定大小随机图片
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<?php$image_width
= 100;
$image_height
= 100;
$image_str
= ‘‘;
if
(isset($_GET[‘w‘]))
{ $image_width
= intval($_GET[‘w‘]);
}if
(isset($_GET[‘h‘]))
{ $image_height
= intval($_GET[‘h‘]);
}if
(isset($_GET[‘s‘]))
{ $image_str
= $_GET[‘s‘];
}$img
= imagecreate($image_width, $image_height);
$color
= imagecolorallocate($img, mt_rand(157,255), mt_rand(157,255), mt_rand(157,255));
imagefilledrectangle($img, 0, $image_height, $image_width, 0, $color);
$step
= mt_rand(15, 30);
$start
= mt_rand(0, $step);
$color
= imagecolorallocate($img, mt_rand(200,255), mt_rand(200,255), mt_rand(200,255));
imagesetthickness($img, mt_rand(3, 10));
if
($image_height
> $image_width)
{ for
($i=$start; $i<$image_height
* 2; $i+=$step)
{
imageline($img, 0, $i, $i, 0, $color);
}
}else{ for
($i=$start; $i<$image_width
* 2; $i+=$step)
{
imageline($img, $i, 0, 0, $i, $color);
}
}if
($image_str
!= ‘‘)
{ $black
= imagecolorallocate($img, 0, 0, 0);
imagestring($img, 12, 5, 5, $image_str, $black);
}header(‘Content-type:image/png‘);
imagepng($img);
imagedestroy($img);
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生成的图如下：