生成缩略图函数imagecopyresampled

以前一直用imagecopyresized来生成缩略图，但发现效果真的很差，后来翻了翻手册，发现用magecopyresampled就对了嘛，效果就牛了。$fwh[0]='118'; $fwh[1]='90'; $file=explode('.',end(explode('/',$pic))); $smallfile ="images/attachments/".$file[0]."_".$fwh[0]."_".$fwh[1].".".$file[1]; if(!file_exists($smallfile)){ $dstW = $fwh[0]; $dstH = $fwh[1]; if($file[1]=='jpg'||$file[1]=='jpeg'){ $src_image = ImageCreateFromJPEG($pic); } if($file[1]=='gif'){ $src_image = ImageCreateFromGIF($pic); } if($file[1]=='PNG'){ $src_image = ImageCreateFromPNG($pic); } $srcW = ImageSX($src_image); $srcH = ImageSY($src_image); if($srcW/$srcH>1){ $dstH=$fwh[1]; $dstW=$srcW*$dstH/$srcH; } if($srcW/$srcH<1){ $dstW=$fwh[0]; $dstH=$dstW*$srcH/$srcW; } $dst_image = ImageCreateTrueColor($dstW,$dstH); imagecopyresampled($dst_image,$src_image,0,0,0,0,$dstW,$dstH,$srcW,$srcH); ImageJpeg($dst_image,$smallfile,80); }