PHP資料夾遍歷，圖片等比例壓縮-php教程-PHP中文網

等比例, PHP

/**
* 來源：網際網路
*/
class image
{
var $w_pct = 100; //> var $w_quality = 100; //品質
var $w_minwidth = 500; //最小寬
var $w_minheight = 500; //最小高
var $interlace = 0; //影像是否為隔行掃描的
var $fontfile ; //字型檔
var $w_img ; //預設浮水印圖
function __construct()
{
$this->fontfile = $_SERVERVER ['DOCUMENT_ROOT'].'/public/fonts/simhei.ttf';
$this->w_img = '';
}
function image()
{
$this- >__construct();
}
function info($img)
{
$imageinfo = getimagesize($img); //傳回影像資訊陣列0=>寬的像素1 =>高的像素2=>是圖像類型的標記3 =>是文字字串，內容為“height="yyy" width="xxx"”，
if($imageinfo === false) return false ;
$imagetype = strtolower(substr(image_type_to_extension($imageinfo[2]),1)); //取得映像檔類型$imageinfo[2]是映像類型的標記
$imagesize = filesize($img ); //圖片大小
$info = array(
'width'=>$imageinfo[0],
'height'=>$imageinfo[1],
'type'=> $imagetype,
'size'=>$imagesize,
'mime'=>$imageinfo['mime']
);
return $info;
}
/**
* 追蹤
*
* @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); //取得圖片資訊
if($info === false) return false;
$srcwidth = $info['width']; //源圖寬
$srcheight = $info['height']; //源圖高
$pathinfo = pathinfo ($image);
$type = $pathinfo['extension']; //取得副檔名
if(!$type) $type = $info['type']; //若沒有取到，用$info['type']
$type = strtolower($type);
unset($info);
$scale = min($maxwidth/$srcwidth, $maxheight/$srcheight) ; //取得縮略比例
//取得依照來源圖的比列
$createwidth = $width = (int) ($srcwidth*$scale);//取得縮寬();
$createheight = $height = (int)($srcheight*$scale);//(); //取得縮略高
$psrc_x = $psrc_y = 0;
if($autocut) //依照縮圖的比例來取得
{
if($maxwidth/$maxheight=$height) //如果縮圖按比列比來源圖窄的話
{
$width = $maxheight/$height*$width; //寬依對應比例做處理
$height = $maxheight;// //高不變
}
elseif( $maxwidth/$maxheight>$srcwidth/$srcheight && $maxwidth>=$width)//如果縮圖按比列比源圖寬的話
{
$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;
}
$createheight = $srcheight;
}
}
$create imagecreatefrom'.($type=='jpg' ? 'jpeg' : $type); //找到不同的圖片處理函數
$srcimg = $createfun($image); //回傳圖片識別碼 if($type != 'gif' && function_exists('imagecreatetruecolor')){ $thumbimg = imagecreatetruecolor($createwidth, $createheight); //新建一個真彩色圖像 }else{
if($maxwidth == '110' && $srcheight >= $srcwidth){
$height1 = 72;
$thumbimg = imagecreate($width, $height1); //調色盤為基礎的圖片
}elseif ($maxwidth == '110' && $srcheight $width1 = 110;
$thumbimg = imagecreate($width1, $height) ; //新建一個基於調色盤的圖片
}else{
$thumbimg = imagecreate($width, $height); //新建一個基於調色盤的圖片
}
}
if(function_exists('imagecopyresampled')){ //重採樣拷貝部分影像並調整大小，真彩
//imagecopyresampled(新圖，來源圖,新圖左上角x距離,新圖左上角y距離,源圖左上角x距離,源圖左上角y距離,新圖寬,新圖高,源圖寬,源圖高)
if($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/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, $srcheight);
}else{ //拷貝部分圖像並調整大小，調色板
imagecopyresized($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $ width, $height, $srcwidth, $srcheight);
}
if($type=='gif' || $type=='png')
{
//imagecolorallocate 為一幅圖片分配顏色
$background_color = imagecolorallocate($thumbimg, 0, 255, 0); // 為基於調色盤的圖片填滿背景色，指派一個綠色
// imagecolortransparent 將某個顏色定義為透明色
imagecolortransparent($thumbimg, $background_color); // 設定為透明色，若註解掉該行則輸出綠色的圖
}
// imageinterlace 啟動或禁止隔行掃描
if ($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; //取得檔案名稱
//aaa.gif aaa_thumb.gif
$imagefun($thumbimg, $filename); //新圖片
imagedestroy($thumbimg); / /銷毀縮圖
imagedestroy($srcimg); //銷毀來源圖
return $filename;
}
/**
* 限制寬或高
*
* @param string $image
* @param int $maxwidth
* @param int $maxheight
* @param string $suffix> * @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); //取得圖片資訊
if($info === false) return false;
$srcwidth = $info['width']; //來源圖寬
$srcheight = $info['height']; //來源圖高
$pathinfo = pathinfo($image);
$type = $pathinfo['extension']; //取得副檔名
if(! $type) $type = $info['type']; //如果沒有取到，用$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;
}
}
$ps = 0;
$createfun = 'imagecreatefrom'.($type=='jpg' ? 'jpeg' : $type); //找到不同的映像處理函數
$srcimg = $createfun($image) ; //回傳圖片識別碼
if($type != 'gif' && function_exists('imagecreatetruecolor')){
$thumbimg = imagecreatetruecolor($createwidth, $createheight); //新建一個真彩色圖像
}else{
$thumbimg = imagecreate($createwidth, $createheight); //新建一個基於調色盤的圖片
}
if(function_exists('imagecopyresampled')){ //重採樣拷貝部分影像並調整大小，真彩
//imagecopyresampled(新圖，源圖,新圖左上角x距離,新圖左上角y距離,源圖左上角x距離,源圖左上角y距離,新圖寬,新圖高,源圖寬,源圖高)
imagecopyresampled($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $createwidth, $createheight, $srcwidth, $srcheightidth, $srcheight );
}else{ //拷貝部分圖像並調整大小，調色板
imagecopyresized($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $createwidth, $createheight, $createheight, $srcwidth, $srcheight);
}
if($type=='gif' || $type=='png')
{
//imagecolorallocate 為一幅圖像分配顏色
$background_color = imagecolorallocate($thumbimg, 0, 255, 0); // 為基於調色盤的圖片填滿背景色，指派一個綠色
// imagecolortransparent 將某個顏色定義為透明色
imagecolortransparent($thumbimg, $background_color); // 設定為透明色，若註解掉該行則輸出綠色的圖
}
// imageinterlace 啟動或禁止隔行掃描
if($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; //取得檔案名稱
//aaa.gif aaa_thumb.gif
$imagefun($thumbimg, $filename); //新圖片
imagedestroy($thumbimg); //銷毀縮圖
imagedestroy($thumbimg); //銷毀縮圖
imagedestroy($srcimg); //銷毀來源圖
return $filename;
}
/**
* 產生特定尺寸縮圖解決原版縮圖無法滿足特定尺寸的問題PS：會裁掉圖片不符合縮圖比例的部分
* @static
* @access public
* @ ？
* @param boolean $interlace 啟用隔行掃描
* @return void
*/
static function thumb2($image, $thumbname, $type='', $maxWidth=200 , $maxHeight=50, $interlace=true) {
// 取得原圖資訊
$info = Image::getImageInfo($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 / $srcHeight); // 計算縮放比例
//判斷原圖和縮圖比例如原圖寬於縮圖則裁掉兩邊反之..
if($maxWidth / $srcWidth > $maxHeight / $srcHeight){
//高於
$srcX = 0;
$srcY = ($srcHeight - $maxHeight / $scale) / 2 ;
$cutWidth = $srcWidth;
;
$cutHeight = $maxHeight / $scale;
}else{
//寬於
$srcX = ($srcWidth - $maxWidth / $scale) / 2;
$srcY = 0;
$cutWidth = $maxWidth / $scale;
$cutHeight = $srcHeight;
}
// 載入原圖
$createFun = 'ImageCreateFrom' . ($type == 'jpg' ? 'jpeg' : $type);
$srcImg = $createFun($image) ;
//建立錢包
if ($type != 'gif' && function_exists('imagecreatetruecolor'))
$thumbImg = imagecreatetruecolor($maxWidth, $maxHeight);
$thumbImg = imagecreate($maxWidth, $maxHeight);
// 複製圖片
if (function_exists("ImageCopyResampled"))
imagecoresppmg,mhmg(pybmg,$pmg,$p,m, 0, $srcX, $srcY, $maxWidth, $maxHeight, $切割寬度，$切割高度）；
else
imagecopyresized($thumbImg, $srcImg, 0, 0, $srcX, $srcY, $maxsrcth , $maxHeight, $cutWidth, $cutHeight);
if ('gif' == $type || 'png' == $type) {
//imagealphablending($thumbImg, false);//取消預設的混色模式
//imagesavealpha( $thumbImg,true);//設定保存完整的alpha 通道資訊
$background_color = imagecolorallocate($thumbImg, 0, 255, 0); // 指派一個綠色
imagecolortransparent($thumbImg, $background_color); // 設定為透明色，若註解掉該行則輸出綠色的圖
}
// 對jpeg圖形設定隔行掃描
if ('jpg' == $type || ' jpeg' == $type)
imageinterlace($thumbImg, $interlace);
// 產生圖片
$imageFun = 'image' . ($type == 'jpg' ? 'jpeg' : $type);
@chmod(dirname($thumbname),0777);
$imageFun($thumbImg, $thumbname);
imageFun($thumbImg, $thumbname);
imagedestroy( $thumbImg);
imagedestroy($srcImg);
回傳$thumbname;
}
回傳false;
}
/**
/**
/** /
static function getImageInfo($img) {
$imageInfo = getimagesize($img);
if ($imageInfo !== false) {
$imageType = strtolower(subsstr image_type_to_extension($imageInfo[2]), 1));
$imageSize = 檔案大小($img);
$info = array(
"寬度" => $imageInfo[0],
"高度" => $imageInfo[1],
"型" => $imageType,
"大小" => $imageSize,
"mime" => $imageInfo['mime']
);
回傳$info;
} else {
回傳false;
}
}
//watermark(來源圖,產生檔案,產生位置,水印檔,水印文字,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($source)) 回傳false;
if(!$target) $target = $source;
if ($w_img == '' && $w_text == '')
$w_img = $this->w_img;
$source_info = getimagesize($source);
$source_w = $source_info[0]; //取得寬
$source_h = $source_info[1]; //取得高
if($source_w w_minwidth || $source_h w_minheight) return false; // 寬與達不到要求直接回傳
switch($source_info[2]) // 新圖
{
case 1 :
$source_img = imagecreatefromgif($ source);
休息；
案例2 :
$source_img = imagecreatefromjpeg($source);
休息；
案例3 :
$source_img = imagecreatefrompng($source);
休息;
預設：
回傳false；
}
if(!empty($w_img) && file_exists($w_img)) //水印檔案
{
$ifwaterimage = 1; // 是否浮水印圖
$water_info = getimaimaize($w_imgesg) ; //浮水印資訊
$width = $water_info[0];
$height = $water_info[1];
switch($water_info[2])
{
情況1 :
$water_img = imagecreatefromgif($w_img);
休息；
案例2 :
$water_img = imagecreatefromjpeg($ 3 :
$water_img = imagecreatefrompng($w_img);
休息；
預設：
回傳;
}
}
else $ifwaterimage = 0;
//imagettfbbox本函數計算並傳回一個包圍TrueType文字範圍的虛擬方框的像素大小。
//imagettfbbox ( 字體大小, 字體角度, 字體檔案,檔案)
// echo $this->fontfile;
$temp = imagettfbbox(ceil($w_font*1.6), 0, $this ->fontfile, $w_text);//取得使用truetype 字體的文字的範圍
$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: //隨機位置
$wx = rand(0,($source_w - $width));
$wy = rand(0,($source_h - $height));
break;
case 1: //左上角
$wx = 25;
$wy = 25;
break;
case 2: //上面中間位置
$ wx = ($source_w - $width) / 2;
$wy = 0;
break;
case 3: //右上角
$wx = $source_w - $width;
$wy = 0;
break;
case 4: //左邊中間位置
$wx = 0;
$wy = ($source_h - $height) / 2;
break;
case 5: //中間位置
$wx = ($source_w - $width) / 2;
$wy = ($source_h - $height) / 2;
break;
case 6: //底部中間位置
$wx = ($source_w - $width) / 2;
$wy = $source_h - $height;
break;
case 7: //左下角
$wx = 0;
$wy = $source_h - $height;
break;
case 8: //右邊中間位置
$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: //隨機
$wx = rand(0,($source_w - $width));
$wy = rand(0,($source_h - $height));
break;
case 10://自訂位置
$wx = $x;
$wy = $y;
case 11: //底部中間位置--手工客專用
$wx = ($source_w - $width) / 2;
$wy = $source_h - $height-50;
break;
break;
}
if($ifwaterimage) //如果有浮水印圖
{
//imagecopymerge 拷貝並合併影像的一部份
//參數(源圖,水印圖,拷貝到源圖x位置,拷貝到來源圖y位置,從水印圖x位置,從水印圖y位置,高,寬,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) ); //取得紅色
$g = hexdec(substr($w_color,3,2)); //取得綠色
$b = hexdec(substr($w_color,5)); //取得藍色
}
else
{
return;
}
//imagecolorallocate 基於調色盤的圖片填滿背景色
//imagestring 水平畫一行字串
//imagestring(來源圖,字體大小,位置X,位置Y,文字,顏色)
//參數($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));
}
//輸出到檔案或瀏覽器
switch($source_info[2])
{
case 1 :
imagegif($source_img, $target); //以GIF 格式將影像輸出至瀏覽器或檔案
break;
case 2 :
imagejpeg($source_img, $target, $this->w_quality); //以JPEG 格式將影像輸出到瀏覽器或檔案
break;
case 3 :
imagepng($source_img, $target); //以PNG 格式將圖片輸出到瀏覽器或檔案
break;
default :
return;
}
if(isset($water_info))
{
unset($water_info); //銷毀
}
if(isset($water_img))
{
imagedestroy($water_img); //銷毀
}
unset($source_info);
imagedestroy($source_img);
return true; //gd庫必須存在，後綴為jpg|jpeg|gif|png，文件存在，imagecreatefromjpeg或者imagecreatefromgif存在
function check($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
}
}
/**
縮圖
1.新建一個圖像資源通過imagecreatefromgif imagecreatefromjpeg imagecreatefrompng
2.imagecopyresampled 拷貝圖片，並調整大小
水印：圖片
2.加浮水印
圖片浮水印：imagecopymerge 把2張圖合併在一起
文字浮水印：imagettftext 寫入文字
*/
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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