PHP文件夾遍歷，圖片等比例壓縮
2018-07-20 來源：open-open
<?php
/**
* 來源：互聯(lián)網(wǎng)
*/
class image
{
var $w_pct = 100; //透明度
var $w_quality = 100; //質(zhì)量
var $w_minwidth = 500; //最小寬
var $w_minheight = 500; //最小高
var $interlace = 0; //圖像是否為隔行掃描的
var $fontfile ; //字體文件
var $w_img ; //默認水印圖
function __construct()
{
$this->fontfile = $_SERVER['DOCUMENT_ROOT'].'/public/fonts/simhei.ttf';
$this->w_img = '';
}
function image()
{
$this->__construct();
}
function info($img)
{
$imageinfo = getimagesize($img); //返回圖像信息數(shù)組 0=>寬的像素 1=>高的像素 2=>是圖像類型的標記 3 =>是文本字符串，內(nèi)容為“height="yyy" width="xxx"”，
if($imageinfo === false) return false;
$imagetype = strtolower(substr(image_type_to_extension($imageinfo[2]),1)); //獲取圖像文件類型 $imageinfo[2]是圖像類型的標記
$imagesize = filesize($img); //圖像大小
$info = array(
'width'=>$imageinfo[0],
'height'=>$imageinfo[1],
'type'=>$imagetype,
'size'=>$imagesize,
'mime'=>$imageinfo['mime']
);
return $info;
}
/**
* 縮略圖
*
* @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); //獲取圖片信息
if($info === false) return false;
$srcwidth = $info['width']; //源圖寬
$srcheight = $info['height']; //源圖高
$pathinfo = pathinfo($image);
$type = $pathinfo['extension']; //取得擴展名
if(!$type) $type = $info['type']; //如果沒有取到，用$info['type']
$type = strtolower($type);
unset($info);
$scale = min($maxwidth/$srcwidth, $maxheight/$srcheight); //獲取縮略比例
//獲取按照源圖的比列
$createwidth = $width = (int) ($srcwidth*$scale);//取得縮略寬();
$createheight = $height = (int)($srcheight*$scale);//(); //取得縮略高
$psrc_x = $psrc_y = 0;
if($autocut) //按照縮略圖的比例來獲取
{
if($maxwidth/$maxheight<$srcwidth/$srcheight && $maxheight>=$height) //如果縮略圖按比列比源圖窄的話
{
$width = $maxheight/$height*$width; //寬按照相應(yīng)比例做處理
$height = $maxheight;// //高不變
}
elseif($maxwidth/$maxheight>$srcwidth/$srcheight && $maxwidth>=$width)//如果縮略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<='280' && $maxwidth != '110'){
$createwidth= $srcwidth;
$createheight = $srcheight;
}
$createfun = 'imagecreatefrom'.($type=='jpg' ? 'jpeg' : $type); //找到不同的圖像處理函數(shù)
$srcimg = $createfun($image); //返回圖像標識符
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, $height1); //新建一個基于調(diào)色板的圖像
}elseif ($maxwidth == '110' && $srcheight <= $srcwidth){
$width1 = 110;
$thumbimg = imagecreate($width1, $height); //新建一個基于調(diào)色板的圖像
}else{
$thumbimg = imagecreate($width, $height); //新建一個基于調(diào)色板的圖像
}
}
if(function_exists('imagecopyresampled')){ //重采樣拷貝部分圖像并調(diào)整大小，真彩
//imagecopyresampled(新圖，源圖,新圖左上角x距離,新圖左上角y距離,源圖左上角x距離,源圖左上角y距離,新圖寬,新圖高,源圖寬,源圖高)
if($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 <= '110'){
$psrc_x = 0;
$psrc_yz = $height/2;
$psrc_y = $psrc_yz;
$width = '110';
}
if($maxheight == '72' && $srcheight <= $srcwidth && $srcheight<= '72' && $srcwidth >= '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, $srcheight);
}else{ //拷貝部分圖像并調(diào)整大小，調(diào)色板
imagecopyresized($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $width, $height, $srcwidth, $srcheight);
}
if($type=='gif' || $type=='png')
{
//imagecolorallocate 為一幅圖像分配顏色
$background_color = imagecolorallocate($thumbimg, 0, 255, 0); // 給基于調(diào)色板的圖像填充背景色， 指派一個綠色
// imagecolortransparent 將某個顏色定義為透明色
imagecolortransparent($thumbimg, $background_color); // 設(shè)置為透明色，若注釋掉該行則輸出綠色的圖
}
// imageinterlace 激活或禁止隔行掃描
if($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; //獲取文件名
//aaa.gif aaa_thumb.gif
$imagefun($thumbimg, $filename); //新建圖像
imagedestroy($thumbimg); //銷毀縮略圖
imagedestroy($srcimg); //銷毀源圖
return $filename;
}
/**
* 限制寬或高
*
* @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); //獲取圖片信息
if($info === false) return false;
$srcwidth = $info['width']; //源圖寬
$srcheight = $info['height']; //源圖高
$pathinfo = pathinfo($image);
$type = $pathinfo['extension']; //取得擴展名
if(!$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<1){
$createwidth = $srcwidth*$scale;
$createheight = $maxheight;
}else{
$createwidth = $srcwidth;
$createheight = $srcheight;
}
}
if($maxheight==0){
$scale = $maxwidth/$srcwidth;
if($scale<1){
$createwidth = $maxwidth;
$createheight = $srcheight*$scale;
}else{
$createwidth = $srcwidth;
$createheight = $srcheight;
}
}
$psrc_x = $psrc_y = 0;
$createfun = 'imagecreatefrom'.($type=='jpg' ? 'jpeg' : $type); //找到不同的圖像處理函數(shù)
$srcimg = $createfun($image); //返回圖像標識符
if($type != 'gif' && function_exists('imagecreatetruecolor')){
$thumbimg = imagecreatetruecolor($createwidth, $createheight); //新建一個真彩色圖像
}else{
$thumbimg = imagecreate($createwidth, $createheight); //新建一個基于調(diào)色板的圖像
}
if(function_exists('imagecopyresampled')){ //重采樣拷貝部分圖像并調(diào)整大小，真彩
//imagecopyresampled(新圖，源圖,新圖左上角x距離,新圖左上角y距離,源圖左上角x距離,源圖左上角y距離,新圖寬,新圖高,源圖寬,源圖高)
imagecopyresampled($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $createwidth, $createheight, $srcwidth, $srcheight);
}else{ //拷貝部分圖像并調(diào)整大小，調(diào)色板
imagecopyresized($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $createwidth, $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); // 給基于調(diào)色板的圖像填充背景色， 指派一個綠色
// imagecolortransparent 將某個顏色定義為透明色
imagecolortransparent($thumbimg, $background_color); // 設(shè)置為透明色，若注釋掉該行則輸出綠色的圖
}
// imageinterlace 激活或禁止隔行掃描
if($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; //獲取文件名
//aaa.gif aaa_thumb.gif
$imagefun($thumbimg, $filename); //新建圖像
imagedestroy($thumbimg); //銷毀縮略圖
imagedestroy($srcimg); //銷毀源圖
return $filename;
}
/**
* 生成特定尺寸縮略圖 解決原版縮略圖不能滿足特定尺寸的問題 PS：會裁掉圖片不符合縮略圖比例的部分
* @static
* @access public
* @param string $image 原圖
* @param string $type 圖像格式
* @param string $thumbname 縮略圖文件名
* @param string $maxWidth 寬度
* @param string $maxHeight 高度
* @param boolean $interlace 啟用隔行掃描
* @return void
*/
static function thumb2($image, $thumbname, $type='', $maxWidth=200, $maxHeight=50, $interlace=true) {
// 獲取原圖信息
$info = Image::getImageInfo($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 / $srcHeight); // 計算縮放比例
//判斷原圖和縮略圖比例 如原圖寬于縮略圖則裁掉兩邊 反之..
if($maxWidth / $srcWidth > $maxHeight / $srcHeight){
//高于
$srcX = 0;
$srcY = ($srcHeight - $maxHeight / $scale) / 2 ;
$cutWidth = $srcWidth;
$cutHeight = $maxHeight / $scale;
}else{
//寬于
$srcX = ($srcWidth - $maxWidth / $scale) / 2;
$srcY = 0;
$cutWidth = $maxWidth / $scale;
$cutHeight = $srcHeight;
}
// 載入原圖
$createFun = 'ImageCreateFrom' . ($type == 'jpg' ? 'jpeg' : $type);
$srcImg = $createFun($image);
//創(chuàng)建縮略圖
if ($type != 'gif' && function_exists('imagecreatetruecolor'))
$thumbImg = imagecreatetruecolor($maxWidth, $maxHeight);
else
$thumbImg = imagecreate($maxWidth, $maxHeight);
// 復制圖片
if (function_exists("ImageCopyResampled"))
imagecopyresampled($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);//取消默認的混色模式
//imagesavealpha($thumbImg,true);//設(shè)定保存完整的 alpha 通道信息
$background_color = imagecolorallocate($thumbImg, 0, 255, 0); // 指派一個綠色
imagecolortransparent($thumbImg, $background_color); // 設(shè)置為透明色，若注釋掉該行則輸出綠色的圖
}
// 對jpeg圖形設(shè)置隔行掃描
if ('jpg' == $type || 'jpeg' == $type)
imageinterlace($thumbImg, $interlace);
// 生成圖片
$imageFun = 'image' . ($type == 'jpg' ? 'jpeg' : $type);
@chmod(dirname($thumbname),0777);
$imageFun($thumbImg, $thumbname);
imagedestroy($thumbImg);
imagedestroy($srcImg);
return $thumbname;
}
return false;
}
/**
* 取得圖像信息
* @static
* @access public
* @param string $image 圖像文件名
* @return mixed
*/
static function getImageInfo($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 $info;
} else {
return false;
}
}
//watermark(源圖,生成文件,生成位置,水印文件,水印文本,背景色)
function watermark($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]; //獲取寬
$source_h = $source_info[1]; //獲取高
if($source_w < $this->w_minwidth || $source_h < $this->w_minheight) return false; //寬和高達不到要求直接返回
switch($source_info[2]) //新建圖片
{
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; //是否水印圖
$water_info = getimagesize($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 本函數(shù)計算并返回一個包圍著 TrueType 文本范圍的虛擬方框的像素大小。
//imagettfbbox ( 字體大小, 字體角度, 字體文件,文件 )
// echo $this->fontfile;
$temp = imagettfbbox(ceil($w_font*1.6), 0, $this->fontfile, $w_text);//取得使用 truetype 字體的文本的范圍
$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: //左面中間位置
$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: //右面中間位置
$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://自定義位置
$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) //如果有水印圖
{
//imagecopymerge 拷貝并合并圖像的一部分
//參數(shù)(源圖,水印圖,拷貝到源圖x位置,拷貝到源圖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)); //獲取紅色
$g = hexdec(substr($w_color,3,2)); //獲取綠色
$b = hexdec(substr($w_color,5)); //獲取藍色
}
else
{
return;
}
//imagecolorallocate 基于調(diào)色板的圖像填充背景色
//imagestring 水平地畫一行字符串
//imagestring(源圖,字體大小,位置X,位置Y,文字,顏色)
//參數(shù)($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));
}
//輸出到文件或者瀏覽器
switch($source_info[2])
{
case 1 :
imagegif($source_img, $target); //以 GIF 格式將圖像輸出到瀏覽器或文件
break;
case 2 :
imagejpeg($source_img, $target, $this->w_quality); //以 JPEG 格式將圖像輸出到瀏覽器或文件
break;
case 3 :
imagepng($source_img, $target); //以 PNG 格式將圖像輸出到瀏覽器或文件
break;
default :
return;
}
if(isset($water_info))
{
unset($water_info); //銷毀
}
if(isset($water_img))
{
imagedestroy($water_img); //銷毀
}
unset($source_info);
imagedestroy($source_img);
return true;
}
//gd庫必須存在，后綴為jpg|jpeg|gif|png，文件存在，imagecreatefromjpeg或者imagecreatefromgif存在
function check($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
}
}
/**
縮略圖
1.新建一個圖像資源 通過 imagecreatefromgif imagecreatefromjpeg imagecreatefrompng
2.imagecopyresampled 拷貝圖像，并調(diào)整大小
水印：圖片水印，文字水印
1. 創(chuàng)建圖像
2.加水印
圖片水印：imagecopymerge 把2張圖合并在一起
文字水�。篿magettftext 向圖像寫入文字
*/
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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