PHP文件夹遍历，图片等比例压缩 -php教程-PHP中文网

/**
* 来源：互联网
*/
class image
{
var $w_pct = 100; //透明度
var $w_quality = 100; //质量
var $w_minwidth = 500; //最小宽
var $w_minheight = 500; //最小高
var $interlace = 0; //图像是否为隔行扫描的
var $fontfile ; //字体文件
var $w_img ; //默认水印图
function __construct()
{
$this->fontfile = $_SERVER['DOCUMENT_ROOT'].'/public/fonts/simhei.ttf';
$this->w_img = '';
}
function image()
{
$this->__construct();
}
function info($img)
{
$imageinfo = getimagesize($img); //返回图像信息数组 0=>宽的像素 1=>高的像素 2=>是图像类型的标记 3 =>是文本字符串，内容为“height="yyy" width="xxx"”，
if($imageinfo === false) return false;
$imagetype = strtolower(substr(image_type_to_extension($imageinfo[2]),1)); //获取图像文件类型 $imageinfo[2]是图像类型的标记
$imagesize = filesize($img); //图像大小
$info = array(
'width'=>$imageinfo[0],
'height'=>$imageinfo[1],
'type'=>$imagetype,
'size'=>$imagesize,
'mime'=>$imageinfo['mime']
);
return $info;
}
/**
* 缩略图
*
* @param string $image
* @param string $filename
* @param int $maxwidth
* @param int $maxheight
* @param string $suffix
* @param int $autocut
* @return string
*/
function thumb($image, $filename = '',$maxwidth = 50, $maxheight = 50, $suffix='_thumb', $autocut = 0)
{
if( !$this->check($image)) return false;
$info = $this->info($image); //获取图片信息
if($info === false) return false;
$srcwidth = $info['width']; //源图宽
$srcheight = $info['height']; //源图高
$pathinfo = pathinfo($image);
$type = $pathinfo['extension']; //取得扩展名
if(!$type) $type = $info['type']; //如果没有取到，用$info['type']
$type = strtolower($type);
unset($info);
$scale = min($maxwidth/$srcwidth, $maxheight/$srcheight); //获取缩略比例
//获取按照源图的比列
$createwidth = $width = (int) ($srcwidth*$scale);//取得缩略宽();
$createheight = $height = (int)($srcheight*$scale);//(); //取得缩略高
$psrc_x = $psrc_y = 0;
if($autocut) //按照缩略图的比例来获取
{
if($maxwidth/$maxheight=$height) //如果缩略图按比列比源图窄的话
{
$width = $maxheight/$height*$width; //宽按照相应比例做处理
$height = $maxheight;// //高不变
}
elseif($maxwidth/$maxheight>$srcwidth/$srcheight && $maxwidth>=$width)//如果缩略图按比列比源图宽的话
{
$height = $maxwidth/$width*$height;//
$width = $maxwidth;
}
if($maxwidth == '55'){
$width = '55';
$createwidth = '55';
}
if($maxwidth == '110'){
$width = '110';
$createwidth = '110';
}
}
if($srcwidth $createwidth= $srcwidth;
$createheight = $srcheight;
}
$createfun = 'imagecreatefrom'.($type=='jpg' ? 'jpeg' : $type); //找到不同的图像处理函数
$srcimg = $createfun($image); //返回图像标识符
if($type != 'gif' && function_exists('imagecreatetruecolor')){
$thumbimg = imagecreatetruecolor($createwidth, $createheight); //新建一个真彩色图像
}else{
if($maxwidth == '110' && $srcheight >= $srcwidth){
$height1 = 72;
$thumbimg = imagecreate($width, $height1); //新建一个基于调色板的图像
}elseif ($maxwidth == '110' && $srcheight $width1 = 110;
$thumbimg = imagecreate($width1, $height); //新建一个基于调色板的图像
}else{
$thumbimg = imagecreate($width, $height); //新建一个基于调色板的图像
}
}
if(function_exists('imagecopyresampled')){ //重采样拷贝部分图像并调整大小，真彩
//imagecopyresampled(新图，源图,新图左上角x距离,新图左上角y距离,源图左上角x距离,源图左上角y距离,新图宽,新图高,源图宽,源图高)
if($maxwidth == '110' && $srcheight >= $srcwidth){
$psrc_x = 0;
$psrc_yz = $height/2;
$psrc_y = $psrc_yz;
$width = '110';
}
if($maxwidth == '110' && $srcheight >= $srcwidth && $srcheight>= '72' && $srcwidth $psrc_x = 0;
$psrc_yz = $height/2;
$psrc_y = $psrc_yz;
$width = '110';
}
if($maxheight == '72' && $srcheight = '110'){
$cha = ($maxheight-$srcheight)/2;
$psrc_y = -($cha);
$width = $srcwidth;
$height = '72';
$srcheight = '72';
}
imagecopyresampled($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $width, $height, $srcwidth, $srcheight);
}else{ //拷贝部分图像并调整大小，调色板
imagecopyresized($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $width, $height, $srcwidth, $srcheight);
}
if($type=='gif' || $type=='png')
{
//imagecolorallocate 为一幅图像分配颜色
$background_color = imagecolorallocate($thumbimg, 0, 255, 0); // 给基于调色板的图像填充背景色，指派一个绿色
// imagecolortransparent 将某个颜色定义为透明色
imagecolortransparent($thumbimg, $background_color); // 设置为透明色，若注释掉该行则输出绿色的图
}
// imageinterlace 激活或禁止隔行扫描
if($type=='jpg' || $type=='jpeg') imageinterlace($thumbimg, $this->interlace);
$imagefun = 'image'.($type=='jpg' ? 'jpeg' : $type);
//imagejpeg imagegif imagepng
if(empty($filename)) $filename = substr($image, 0, strrpos($image, '.')).$suffix.'.'.$type; //获取文件名
//aaa.gif aaa_thumb.gif
$imagefun($thumbimg, $filename); //新建图像
imagedestroy($thumbimg); //销毁缩略图
imagedestroy($srcimg); //销毁源图
return $filename;
}
/**
* 限制宽或高
*
* @param string $image
* @param int $maxwidth
* @param int $maxheight
* @param string $suffix
* @return string
*/
function thumb3($image,$maxwidth = 0, $maxheight = 0, $suffix='_thumb')
{
if( !$this->check($image)) return false;
$info = $this->info($image); //获取图片信息
if($info === false) return false;
$srcwidth = $info['width']; //源图宽
$srcheight = $info['height']; //源图高
$pathinfo = pathinfo($image);
$type = $pathinfo['extension']; //取得扩展名
if(!$type) $type = $info['type']; //如果没有取到，用$info['type']
$type = strtolower($type);
unset($info);
if($maxwidth==0){
$scale = $maxheight/$srcheight;
if($scale $createwidth = $srcwidth*$scale;
$createheight = $maxheight;
}else{
$createwidth = $srcwidth;
$createheight = $srcheight;
}
}
if($maxheight==0){
$scale = $maxwidth/$srcwidth;
if($scale $createwidth = $maxwidth;
$createheight = $srcheight*$scale;
}else{
$createwidth = $srcwidth;
$createheight = $srcheight;
}
}
$psrc_x = $psrc_y = 0;
$createfun = 'imagecreatefrom'.($type=='jpg' ? 'jpeg' : $type); //找到不同的图像处理函数
$srcimg = $createfun($image); //返回图像标识符
if($type != 'gif' && function_exists('imagecreatetruecolor')){
$thumbimg = imagecreatetruecolor($createwidth, $createheight); //新建一个真彩色图像
}else{
$thumbimg = imagecreate($createwidth, $createheight); //新建一个基于调色板的图像
}
if(function_exists('imagecopyresampled')){ //重采样拷贝部分图像并调整大小，真彩
//imagecopyresampled(新图，源图,新图左上角x距离,新图左上角y距离,源图左上角x距离,源图左上角y距离,新图宽,新图高,源图宽,源图高)
imagecopyresampled($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $createwidth, $createheight, $srcwidth, $srcheight);
}else{ //拷贝部分图像并调整大小，调色板
imagecopyresized($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $createwidth, $createheight, $srcwidth, $srcheight);
}
if($type=='gif' || $type=='png')
{
//imagecolorallocate 为一幅图像分配颜色
$background_color = imagecolorallocate($thumbimg, 0, 255, 0); // 给基于调色板的图像填充背景色，指派一个绿色
// imagecolortransparent 将某个颜色定义为透明色
imagecolortransparent($thumbimg, $background_color); // 设置为透明色，若注释掉该行则输出绿色的图
}
// imageinterlace 激活或禁止隔行扫描
if($type=='jpg' || $type=='jpeg') imageinterlace($thumbimg, $this->interlace);
$imagefun = 'image'.($type=='jpg' ? 'jpeg' : $type);
//imagejpeg imagegif imagepng
$filename = substr($image, 0, strrpos($image, '.')).$suffix.'.'.$type; //获取文件名
//aaa.gif aaa_thumb.gif
$imagefun($thumbimg, $filename); //新建图像
imagedestroy($thumbimg); //销毁缩略图
imagedestroy($srcimg); //销毁源图
return $filename;
}
/**
* 生成特定尺寸缩略图解决原版缩略图不能满足特定尺寸的问题 PS：会裁掉图片不符合缩略图比例的部分
* @static
* @access public
* @param string $image 原图
* @param string $type 图像格式
* @param string $thumbname 缩略图文件名
* @param string $maxWidth 宽度
* @param string $maxHeight 高度
* @param boolean $interlace 启用隔行扫描
* @return void
*/
static function thumb2($image, $thumbname, $type='', $maxWidth=200, $maxHeight=50, $interlace=true) {
// 获取原图信息
$info = Image::getImageInfo($image);
if ($info !== false) {
$srcWidth = $info['width'];
$srcHeight = $info['height'];
$type = empty($type) ? $info['type'] : $type;
$type = strtolower($type);
$interlace = $interlace ? 1 : 0;
unset($info);
$scale = max($maxWidth / $srcWidth, $maxHeight / $srcHeight); // 计算缩放比例
//判断原图和缩略图比例如原图宽于缩略图则裁掉两边反之..
if($maxWidth / $srcWidth > $maxHeight / $srcHeight){
//高于
$srcX = 0;
$srcY = ($srcHeight - $maxHeight / $scale) / 2 ;
$cutWidth = $srcWidth;
$cutHeight = $maxHeight / $scale;
}else{
//宽于
$srcX = ($srcWidth - $maxWidth / $scale) / 2;
$srcY = 0;
$cutWidth = $maxWidth / $scale;
$cutHeight = $srcHeight;
}
// 载入原图
$createFun = 'ImageCreateFrom' . ($type == 'jpg' ? 'jpeg' : $type);
$srcImg = $createFun($image);
//创建缩略图
if ($type != 'gif' && function_exists('imagecreatetruecolor'))
$thumbImg = imagecreatetruecolor($maxWidth, $maxHeight);
else
$thumbImg = imagecreate($maxWidth, $maxHeight);
// 复制图片
if (function_exists("ImageCopyResampled"))
imagecopyresampled($thumbImg, $srcImg, 0, 0, $srcX, $srcY, $maxWidth, $maxHeight, $cutWidth, $cutHeight);
else
imagecopyresized($thumbImg, $srcImg, 0, 0, $srcX, $srcY, $maxWidth, $maxHeight, $cutWidth, $cutHeight);
if ('gif' == $type || 'png' == $type) {
//imagealphablending($thumbImg, false);//取消默认的混色模式
//imagesavealpha($thumbImg,true);//设定保存完整的 alpha 通道信息
$background_color = imagecolorallocate($thumbImg, 0, 255, 0); // 指派一个绿色
imagecolortransparent($thumbImg, $background_color); // 设置为透明色，若注释掉该行则输出绿色的图
}
// 对jpeg图形设置隔行扫描
if ('jpg' == $type || 'jpeg' == $type)
imageinterlace($thumbImg, $interlace);
// 生成图片
$imageFun = 'image' . ($type == 'jpg' ? 'jpeg' : $type);
@chmod(dirname($thumbname),0777);
$imageFun($thumbImg, $thumbname);
imagedestroy($thumbImg);
imagedestroy($srcImg);
return $thumbname;
}
return false;
}
/**
* 取得图像信息
* @static
* @access public
* @param string $image 图像文件名
* @return mixed
*/
static function getImageInfo($img) {
$imageInfo = getimagesize($img);
if ($imageInfo !== false) {
$imageType = strtolower(substr(image_type_to_extension($imageInfo[2]), 1));
$imageSize = filesize($img);
$info = array(
"width" => $imageInfo[0],
"height" => $imageInfo[1],
"type" => $imageType,
"size" => $imageSize,
"mime" => $imageInfo['mime']
);
return $info;
} else {
return false;
}
}
//watermark(源图,生成文件,生成位置,水印文件,水印文本,背景色)
function watermark($source, $target = '', $w_pos = 9, $w_img = '', $w_text = '', $w_font = 12, $w_color = '#cccccc',$x='',$y='')
{
if( !$this->check($source)) return false;
if(!$target) $target = $source;
if ($w_img == '' && $w_text == '')
$w_img = $this->w_img;
$source_info = getimagesize($source);
$source_w = $source_info[0]; //获取宽
$source_h = $source_info[1]; //获取高
if($source_w w_minwidth || $source_h w_minheight) return false; //宽和高达不到要求直接返回
switch($source_info[2]) //新建图片
{
case 1 :
$source_img = imagecreatefromgif($source);
break;
case 2 :
$source_img = imagecreatefromjpeg($source);
break;
case 3 :
$source_img = imagecreatefrompng($source);
break;
default :
return false;
}
if(!empty($w_img) && file_exists($w_img)) //水印文件
{
$ifwaterimage = 1; //是否水印图
$water_info = getimagesize($w_img); //水印信息
$width = $water_info[0];
$height = $water_info[1];
switch($water_info[2])
{
case 1 :
$water_img = imagecreatefromgif($w_img);
break;
case 2 :
$water_img = imagecreatefromjpeg($w_img);
break;
case 3 :
$water_img = imagecreatefrompng($w_img);
break;
default :
return;
}
}
else
{
$ifwaterimage = 0;
//imagettfbbox 本函数计算并返回一个包围着 TrueType 文本范围的虚拟方框的像素大小。
//imagettfbbox ( 字体大小, 字体角度, 字体文件,文件 )
// echo $this->fontfile;
$temp = imagettfbbox(ceil($w_font*1.6), 0, $this->fontfile, $w_text);//取得使用 truetype 字体的文本的范围
$width = $temp[4] - $temp[6]; //右上角 X 位置 - 左上角 X 位置
$height = $temp[3] - $temp[5]; //右下角 Y 位置- 右上角 Y 位置
unset($temp);
}
switch($w_pos)
{
case 0: //随机位置
$wx = rand(0,($source_w - $width));
$wy = rand(0,($source_h - $height));
break;
case 1: //左上角
$wx = 25;
$wy = 25;
break;
case 2: //上面中间位置
$wx = ($source_w - $width) / 2;
$wy = 0;
break;
case 3: //右上角
$wx = $source_w - $width;
$wy = 0;
break;
case 4: //左面中间位置
$wx = 0;
$wy = ($source_h - $height) / 2;
break;
case 5: //中间位置
$wx = ($source_w - $width) / 2;
$wy = ($source_h - $height) / 2;
break;
case 6: //底部中间位置
$wx = ($source_w - $width) / 2;
$wy = $source_h - $height;
break;
case 7: //左下角
$wx = 0;
$wy = $source_h - $height;
break;
case 8: //右面中间位置
$wx = $source_w - $width;
$wy = ($source_h - $height) /2;
break;
case 9: //右下角
$wx = $source_w - $width;
$wy = $source_h - $height ;
break;
default: //随机
$wx = rand(0,($source_w - $width));
$wy = rand(0,($source_h - $height));
break;
case 10://自定义位置
$wx = $x;
$wy = $y;
case 11: //底部中间位置--手工客专用
$wx = ($source_w - $width) / 2;
$wy = $source_h - $height-50;
break;
break;
}
if($ifwaterimage) //如果有水印图
{
//imagecopymerge 拷贝并合并图像的一部分
//参数(源图,水印图,拷贝到源图x位置,拷贝到源图y位置,从水印图x位置,从水印图y位置,高,宽,透明度)
//imagecopymerge($source_img, $water_img, $wx, $wy, 0, 0, $width, $height, $this->w_pct);
imagecopy($source_img,$water_img,$wx,$wy,0,0,$width,$height);
}
else
{
if(!empty($w_color) && (strlen($w_color)==7))
{
$r = hexdec(substr($w_color,1,2)); //获取红色
$g = hexdec(substr($w_color,3,2)); //获取绿色
$b = hexdec(substr($w_color,5)); //获取蓝色
}
else
{
return;
}
//imagecolorallocate 基于调色板的图像填充背景色
//imagestring 水平地画一行字符串
//imagestring(源图,字体大小,位置X,位置Y,文字,颜色)
//参数($image, float $size, float $angle, int $x, int $y, int $color, string $fontfile, string $text)
imagettftext($source_img,$w_font,0,$wx,$wy,imagecolorallocate($source_img,$r,$g,$b),$this->fontfile,$w_text);
//imagestring($source_img,$w_font,$wx,$wy,$w_text,imagecolorallocate($source_img,$r,$g,$b));
}
//输出到文件或者浏览器
switch($source_info[2])
{
case 1 :
imagegif($source_img, $target); //以 GIF 格式将图像输出到浏览器或文件
break;
case 2 :
imagejpeg($source_img, $target, $this->w_quality); //以 JPEG 格式将图像输出到浏览器或文件
break;
case 3 :
imagepng($source_img, $target); //以 PNG 格式将图像输出到浏览器或文件
break;
default :
return;
}
if(isset($water_info))
{
unset($water_info); //销毁
}
if(isset($water_img))
{
imagedestroy($water_img); //销毁
}
unset($source_info);
imagedestroy($source_img);
return true;
}
//gd库必须存在，后缀为jpg|jpeg|gif|png，文件存在，imagecreatefromjpeg或者imagecreatefromgif存在
function check($image)
{
return extension_loaded('gd') &&
preg_match("/\.(JPG|JPEG|PNG|GIF|jpg|jpeg|gif|png)/i", $image, $m) &&
file_exists($image) &&
function_exists('imagecreatefrom'.($m[1] == 'jpg' ? 'jpeg' : $m[1]));
//imagecreatefromjpeg
//imagecreatefromgif
//imagecreatefrompng
}
}
/**
缩略图
1.新建一个图像资源通过 imagecreatefromgif imagecreatefromjpeg imagecreatefrompng
2.imagecopyresampled 拷贝图像，并调整大小
水印：图片水印，文字水印
1. 创建图像
2.加水印
图片水印：imagecopymerge 把2张图合并在一起
文字水印：imagettftext 向图像写入文字
*/
error_reporting(0);
$hostdir = dirname(__FILE__);
$filesnames = scandir($hostdir.'/desktop');
$img = new image();
foreach($filesnames as $name){
if($name != '.' && $name != '..'){
$imgPath = $hostdir.'/desktop/';
$imgsize = getimagesize($imgPath.$name);
$imgInfo = explode('.',$name);
$imginfo2 = explode('_',$imgInfo[0]);
if($imginfo2[count($imginfo2)-1] != 'small'){
$img_small = $imgPath.$imgInfo[0].'_small.'.$imgInfo[1];
$img->thumb2($imgPath.$name,$img_small,'',$imgsize[0]/4,$imgsize[1]/4);
}
}
}

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