PHP 生成指定大小随机图片

PHP 生成指定大小随机图片

<?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);

生成的图如下:

http://files.cnblogs.com/zjfree/rand_img.rar

原文地址:https://www.cnblogs.com/zjfree/p/3729865.html