PHP文件夾遍歷，圖片等比例壓縮
<?php
/*** 來源：互聯網 */ class image { var $w_pct = 100; //透明度 var $w_quality = 100; //質量 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 $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, $height1); //新建一個基于調色板的圖像 }elseif ($maxwidth == '110' && $srcheight <= $srcwidth){ $width1 = 110; $thumbimg = imagecreate($width1, $height); //新建一個基于調色板的圖像 }else{ $thumbimg = imagecreate($width, $height); //新建一個基于調色板的圖像 } } if(function_exists('imagecopyresampled')){ //重采樣拷貝部分圖像并調整大小，真彩 //imagecopyresampled(新圖，源圖,新圖左上角x距離,新圖左上角y距離,源圖左上角x距離,源圖左上角y距離,新圖寬,新圖高,源圖寬,源圖高) if($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 為一幅圖像分配顏色 $background_color = imagecolorallocate($thumbimg, 0, 255, 0); // 給基于調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 $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, $createheight); //新建一個基于調色板的圖像 } if(function_exists('imagecopyresampled')){ //重采樣拷貝部分圖像并調整大小，真彩 //imagecopyresampled(新圖，源圖,新圖左上角x距離,新圖左上角y距離,源圖左上角x距離,源圖左上角y距離,新圖寬,新圖高,源圖寬,源圖高) imagecopyresampled($thumbimg, $srcimg, 0, 0, $psrc_x, $psrc_y, $createwidth, $createheight, $srcwidth, $srcheight); }else{ //拷貝部分圖像并調整大小，調色板 imagecopyresized($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); // 設置為透明色，若注釋掉該行則輸出綠色的圖 } // 對jpeg圖形設置隔行掃描 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(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($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，并調整大小 水印：圖片水印，文字水印 1. 創建圖像 2.加水印 圖片水印：imagecopymerge 把2張圖合并在一起 文字水印：imagettftext 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); } } } </pre>
本文由用戶 mmxn 自行上傳分享，僅供網友學習交流。所有權歸原作者，若您的權利被侵害，請聯系管理員。
轉載本站原創文章，請注明出處，并保留原始鏈接、圖片水印。
本站是一個以用戶分享為主的開源技術平臺，歡迎各類分享！