PHP upload pictures, etc. than the code to zoom the picture

/** * * @author Zhao Jinhan * @date January 13, 2014 11:54:30 * @email xb_zjh@126.com * */ Header (' content-type:text/html; Charset=utf-8 '); Define the width height of the thumbnail image Define (' Thumb_width ', 300); Define (' Thumb_height ', 300); /** * Regenerate the uploaded file name * @return String * @author Zhao Jinhan * */ function _file_type ($filetype = null) { Switch ($filetype) { Case "Image/jpeg": $fileextname = "JPG"; Break Case "Image/gif": $fileextname = "gif"; Break Case "Image/png": $fileextname = "png"; Break Default $fileextname = false; Break } return $fileextname date (' Ymdhis ', Time ()). $fileextname: false; } /** * * @param string $filename * @param string $width * @param string $height * @param string $quality * @param string $savepath * @return Boolean */ function _make_thumb ($filename = ", $width =thumb_width, $height =thumb_height, $savepath = './upload ') { if (file_exists ($filename)) { Size of the uploaded image $imagesize =getimagesize ($filename); $imagewidth = $imagesize [0]; $imageheight = $imagesize [1]; $mime = $imagesize [' MIME ']; Width/height ratio $ratio = $imagewidth/$imageheight; Create a new background image $bgimg = Imagecreatetruecolor ($width, $height); $white = Imagecolorallocate ($bgimg, 255, 255, 255); Fill background color to white Imagefill ($bgimg, 0,0, $white); if ($mime = = ' Image/gif ') { $im = @imagecreatefromgif ($filename); /* Attempt to open */ $outfun = ' imagegif '; }elseif ($mime = = ' Image/png ') { $im = @imagecreatefrompng ($filename); /* Attempt to open */ $outfun = ' imagepng '; }else{ $im = @imagecreatefromjpeg ($filename); /* Attempt to open */ $outfun = ' imagejpeg '; } if ($ratio > 1) { Large width if ($imagewidth > $width) { Zoom the picture onto the background image $new _width = $width; $new _height = ($width * $imageheight)/$imagewidth; $BG _y = Ceil (ABS (($height-$new _height)/2); Imagecopyresampled ($bgimg, $im, 0, $bg _y, 0, 0, $new _width, $new _height, $imagewidth, $imageheight); }else{ Copy picture to background image $copy = true; } }else{ Highly large if ($imageheight > $height) { Zoom picture $new _height = $height; $new _width = ($height * $imagewidth)/$imageheight; $BG _x = Ceil (($width-$new _width)/2); Imagecopyresampled ($bgimg, $im, $bg _x, 0, 0, 0, $new _width, $new _height, $imagewidth, $imageheight); }else{ Copy picture to background image $copy = true; } } if ($copy) { Copy picture to background image $BG _x = Ceil (($width-$imagewidth)/2); $BG _y = Ceil (($height-$imageheight)/2); Imagecopy ($bgimg, $im, $bg _x, $bg _y, 0, 0, $imagewidth, $imageheight); } $ext = _file_type ($mime); $outfun ($bgimg, $savepath. ' /'. $ext); Imagedestroy ($BGIMG); return $savepath. ' /'. $ext; }else{ return false; } } if ($_post) { $size = $_post[' size ']?strtoupper (Trim ($_post[' size ')): ' 2M '; $imgsize = $_files[' img ' [' Size ']?$_files[' img '] [' Size ']/(1024*1024): 0; $imgwidth = $imgheight = $_post[' Width-height ']?intval ($_post[' Width-height ']): 300; Custom definition File Upload size Ini_set (' upload_max_filesize ', $size); $mathsize = Str_replace (' M ', ' ', $size); if ($imgsize > $mathsize) { echo "Picture size must not exceed {$size}!"; Return } if ($file _name = _file_type ($_files[' img ' [' type '])) { if ($_files[' img ' [' error '] = = UPLOAD_ERR_OK) { $savepath = ' upload/'; if (!is_dir ($savepath)) { mkdir ($savepath, 0644); } Generate thumbnail images $thumb _file = _make_thumb ($_files[' img ' [' tmp_name '], $imgwidth, $imgheight, $savepath); Move_uploaded_file ($_files[' img '] [' tmp_name '], $savepath. $file _name); echo "The resulting image is:"; }else{ echo $_files[' img ' [' ERROR ']; Return } }else{ echo "image format is not correct, please upload jpg,gif,png format!"; Return } }else{ Echo << Zoom picture Save to Square EOT; } Copy Code

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