php>
一、创建图片资源
imagecreatetruecolor(width,height);
imagecreatefromgif(图片名称);
imagecreatefrompng(图片名称);
imagecreatefromjpeg(图片名称);画出各种图像 imagegif(图片资源,保存路径);
imagepng()
imagejpeg();
二、获取图片属性
imagesx(res//宽度
imagesy(res//高度
getimagesize(文件路径)
返回一个具有四个单元的数组。索引 0 包含图像宽度的像素值，索引 1 包含图像高度的像素值。索引 2 是图像类型的标记：1 = GIF，2 = JPG，3 = PNG，4 = SWF，5 = PSD，6 = BMP，7 = TIFF(intel byte order)，8 = TIFF(motorola byte order)，9 = JPC，10 = JP2，11 = JPX，12 = JB2，13 = SWC，14 = IFF，15 = WBMP，16 = XBM。这些标记与 PHP 4.3.0 新加的 IMAGETYPE 常量对应。索引 3 是文本字符串，内容为“height="yyy" width="xxx"”，可直接用于 IMG 标记。
销毁图像资源
imagedestroy(图片资源);
三、透明处理
PNG、jpeg透明色都正常，只有gif不正常
imagecolortransparent(resource image [,int color])//将某个颜色设置成透明色
imagecolorstotal()
imagecolorforindex();
四、图片的裁剪
imagecopyresized()
imagecopyresampled();
五、加水印（文字、图片）
字符串编码转换string iconv ( string $in_charset , string $out_charset , string $str )
六、图片旋转
imagerotate();//制定角度的图片翻转
七、图片的翻转
沿X轴 沿Y轴翻转
八、锐化
imagecolorsforindex()
imagecolorat()
在图片上画图形 $img=imagecreatefromgif("./images/map.gif");
<span> <?<span php><span> <span><span><span> <span><span> <span edit by www.jbxue.com><span> <span>
<span> <span>= imagecolorallocate(<span>, 255, 0, 0<span><span>
<span> imageline(<span>, 0, 0, 100, 100, <span><span><span> imageellipse(<span>, 200, 100, 100, 100, <span><span><span> imagegif(<span>, "./images/map2.gif"<span><span> imagedestroy(<span><span><span> <span><span> 复制代码 代码如下:
<span>
<span> <span>="./images/hee.jpg"<span><span> <span>=0.3<span><span> <span list>(<span>, <span>)=<span getimagesize>(<span><span><span> <span>=<span>*<span><span><span> <span>=<span>*<span><span><span> <span>=imagecreatetruecolor(<span>, <span><span><span> <span>=imagecreatefromjpeg(<span><span><span> <span><span>
<span> imagecopyresized(<span>, <span>,0, 0,0, 0,<span>, <span>, <span>, <span><span><span> <span><span>
<span> imagejpeg(<span>, "./images/hee2.jpg"<span><span> imagedestroy(<span><span><span> imagedestroy(<span><span><span>
<span> <span><span> 复制代码 代码如下:
<span>
<span> <span function> thumn(<span>, <span>, <span>, <span><span><span> <span list>(<span>, <span>)=<span getimagesize>(<span>);<span><span>
<span> <span if> (<span> && (<span> < <span><span><span> <span> = (<span> / <span>) * <span><span><span> } <span else><span><span> <span> = (<span> / <span>) * <span><span><span> <span><span> <span>=imagecreatetruecolor(<span>, <span><span><span> <span>=imagecreatefromjpeg(<span><span><span> imagecopyresampled(<span>, <span>, 0, 0, 0, 0, <span>, <span>, <span>, <span><span><span> imagejpeg(<span>, <span><span><span> imagedestroy(<span><span><span> imagedestroy(<span><span><span> <span><span> thumn("images/hee.jpg", 200, 200, "./images/hee3.jpg"<span><span>
<span> <span gif><span> 复制代码 代码如下:
<span>
<span> <span function> thumn(<span>, <span>, <span>, <span><span><span> <span list>(<span>, <span>)=<span getimagesize>(<span><span><span> <span if> (<span> && (<span> < <span><span><span> <span> = (<span> / <span>) * <span><span><span> } <span else><span><span> <span> = (<span> / <span>) * <span><span><span> <span><span> <span>=imagecreatetruecolor(<span>, <span><span><span> <span>=imagecreatefromgif(<span><span><span> <span>=imagecolortransparent(<span><span><span> <span if>(<span> >=0 && <span> < imagecolorstotal(<span>)){<span><span>
<span> <span>=imagecolorsforindex(<span>, <span>);<span><span>
<span> <span>=imagecolorallocate(<span>, <span>["red"], <span>["green"], <span>["blue"<span><span> imagefill(<span>, 0, 0, <span><span><span> imagecolortransparent(<span>, <span><span><span> <span><span> imagecopyresized(<span>, <span>, 0, 0, 0, 0, <span>, <span>, <span>, <span><span><span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>
