PHP中利用程序处理图片

分两个程序,一个是类文件,一个是操作文件.

两个程序加起来就是一个完整的PHP处理图片的程序!

这个程序写的很规范,我感觉这个程序还是有很多地方是可以优化的!

类文件:

<?
/***************************************/
/*功能：利用PHP的GD库生成高质量的缩略图*/
/*运行环境:PHP5.01/GD2*/
/*类说明：可以选择是/否裁图。

如果裁图则生成的图的尺寸与您输入的一样。
原则：尽可能多保持原图完整
如果不裁图，则按照原图比例生成新图
原则：根据比例以输入的长或者宽为基准*/

/*参数：$img:源图片地址
$wid:新图的宽度
$hei:新图的高度
$c:是否裁图，1为是，0为否*/

/* Author: antplus */
/* version: 1.1 */
/* QQ: 38188141 */
/* MSN: antplus@163.net */
/* Edit by meiking */
/***************************************/

class resizeimage{
//图片类型
var $type;

//实际宽度
var $width;

//实际高度
var $height;

//改变后的宽度
var $resize_width;

//改变后的高度
var $resize_height;

//是否裁图
var $cut;

//源图象
var $srcimg;

//目标图象地址
var $dstimg;

//临时创建的图象
var $im;

function resizeimage($img, $wid, $hei,$c){

$this->srcimg = $img;
$this->resize_width = $wid;
$this->resize_height = $hei;
$this->cut = $c;

//图片的类型
$this->type = substr(strrchr($this->srcimg,"."),1);

//初始化图象
$this->initi_img();

//目标图象地址
$this -> dst_img();

//--
$this->width = imagesx($this->im);
$this->height = imagesy($this->im);

//生成图象
$this->newimg();

ImageDestroy ($this->im);
}

function newimg(){
// +----------------------------------------------------+
// | 增加LOGO到缩略图中 Modify By Ice
// +----------------------------------------------------+
//Add Logo
$logoImage = ImageCreateFromGIF('logo.gif');
ImageAlphaBlending($this->im, true);
$logoW = ImageSX($logoImage);
$logoH = ImageSY($logoImage);

// +----------------------------------------------------+
//改变后的图象的比例
$resize_ratio = ($this->resize_width)/($this->resize_height);

//实际图象的比例
$ratio = ($this->width)/($this->height);

if(($this->cut)=="1")
//裁图
{

if($ratio>=$resize_ratio)
//高度优先
{

$newimg = imagecreatetruecolor($this->resize_width,$this->resize_height);
imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width,$this->resize_height, (($this->height)*$resize_ratio), $this->height);

// +----------------------------------------------------+
// | 增加LOGO到缩略图中 Modify By Ice
// +----------------------------------------------------+
ImageCopy($newimg, $logoImage, 0, 0, 0, 0, $logoW, $logoH);

// +----------------------------------------------------+
ImageJpeg ($newimg,$this->dstimg);
}

if($ratio<$resize_ratio)
//宽度优先
{

$newimg = imagecreatetruecolor($this->resize_width,$this->resize_height);
imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width, $this->resize_height, $this->width, (($this->width)/$resize_ratio));

// +----------------------------------------------------+
// | 增加LOGO到缩略图中 Modify By Ice
// +----------------------------------------------------+

ImageCopy($newimg, $logoImage, 0, 0, 0, 0, $logoW, $logoH);
// +----------------------------------------------------+
ImageJpeg ($newimg,$this->dstimg);
}
}
else
//不裁图
{

if($ratio>=$resize_ratio){

$newimg = imagecreatetruecolor($this->resize_width,($this->resize_width)/$ratio);
imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width, ($this->resize_width)/$ratio, $this->width, $this->height);

// +----------------------------------------------------+
// | 增加LOGO到缩略图中 Modify By Ice
// +----------------------------------------------------+

ImageCopy($newimg, $logoImage, 0, 0, 0, 0, $logoW, $logoH);
// +----------------------------------------------------+

ImageJpeg ($newimg,$this->dstimg);
}

if($ratio<$resize_ratio){

$newimg = imagecreatetruecolor(($this->resize_height)*$ratio,$this->resize_height);
imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, ($this->resize_height)*$ratio, $this->resize_height, $this->width, $this->height);

// +----------------------------------------------------+
// | 增加LOGO到缩略图中 Modify By Ice
// +----------------------------------------------------+

ImageCopy($newimg, $logoImage, 0, 0, 0, 0, $logoW, $logoH);
// +----------------------------------------------------+

ImageJpeg ($newimg,$this->dstimg);
}
}

// +----------------------------------------------------+
// | 释放资源 Modify By Ice
// +----------------------------------------------------+

ImageDestroy($logoImage);
// +----------------------------------------------------+

}

//初始化图象
function initi_img(){

if($this->type=="jpg"){

$this->im = imagecreatefromjpeg($this->srcimg);
}

if($this->type=="gif"){

$this->im = imagecreatefromgif($this->srcimg);
}

if($this->type=="png"){

$this->im = imagecreatefrompng($this->srcimg);
}
}

//图象目标地址
function dst_img(){

$full_length = strlen($this->srcimg);
$type_length = strlen($this->type);
$name_length = $full_length-$type_length;
$name = substr($this->srcimg,0,$name_length-1);

$this->dstimg = $name."_small".".".$this->type;
}

//程序最后取得图片地址
function getImg(){

return $this->dstimg;
}
}
?>

操作文件很简单,只要把类文件看懂了,这个程序不值一提,是我写的,肯定是没有上面规范的!

<?PHP

//需要处理的路径及名称
$imgPath = "./name.jpg";

//按比例处理图片的最大高度和最大宽度
$imgHeight = 60;
$imgWidth = 80;

//是否截图
$isCut = 0;

//下面是PHP中类的标准写法,就不说了!
require "img.inc.php";
$img = new resizeimage($imgPath,$imgWidth,$imgHeight,$isCut);

$newImg = $img -> getImg();
?>

<IMG src="<? echo $newImg; ?>"]

meiking 2005-01-04 12:01:49 评论:0 阅读:1522 引用:0

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