PHP Gets the remote picture and adjusts the image size of the implementation code

/** * * Function: Resize the picture or create a thumbnail image * Revision: 2013-2-15 * Return: True/false Parameters * $Image need to adjust the picture (including the path) * $Dw =450 The maximum width when adjusting; absolute width when thumbnail * $Dh Maximum height for =450 adjustment, absolute height when thumbnail * $Type = 1 1, adjust the size; 2, generate thumbnail image * Site http://bbs.it-home.org */ $phtypes =array (' img/gif ', ' img/jpg ', ' img/jpeg ', ' img/bmp ', ' img/pjpeg ', ' img/x-png '); function compressimg ($Image, $Dw, $Dh, $Type) { Echo $Image; IF (!file_exists ($Image)) { echo "no picture exists"; return false; } echo "Existence picture"; If you need to generate thumbnails, copy the original image to $image assignment (generate thumbnail action) When Type==1, the original image file is not copied, but the reduced image is regenerated on the original image file (resizing operation) IF ($Type!=1) { Copy ($Image, Str_replace (".", "_x.", $Image)); $Image =str_replace (".", "_x.", $Image); } Get the type of file, build different objects according to different types $ImgInfo =getimagesize ($Image); Switch ($ImgInfo [2]) { Case 1: $IMG = @imagecreatefromgif ($Image); Break Case 2: $IMG = @imagecreatefromjpeg ($Image); break; Case 3: $IMG = @imagecreatefrompng ($Image); Break } If the object is not created successfully, the non-picture file IF (Empty ($IMG)) { If an error occurs when generating thumbnails, you need to delete the files that have already been copied IF ($Type!=1) { Unlink ($Image); } return false; } If you are performing a resize operation IF ($Type ==1) { $w =imagesx ($IMG); $h =imagesy ($IMG); $width = $w; $height = $h; IF ($width > $Dw) { $Par = $Dw/$width; $width = $Dw; $height = $height * $PAR; IF ($height > $Dh) { $Par = $Dh/$height; $height = $Dh; $width = $width * $PAR; } } ElseIF ($height > $Dh) { $Par = $Dh/$height; $height = $Dh; $width = $width * $PAR; IF ($width > $Dw) { $Par = $Dw/$width; $width = $Dw; $height = $height * $PAR; } } Else { $width = $width; $height = $height; } $NIMG =imagecreatetruecolor ($width, $height);//Create a new True color canvas Imagecopyresampled ($NIMG, $IMG, 0,0,0,0, $width, $height, $w, $h);//Resample copy part of the image and resize it Imagejpeg ($NIMG, $Image);//output images to a browser or file in JPEG format return true; } Else {//If you are performing a build thumbnail operation $w =imagesx ($IMG); $h =imagesy ($IMG); $width = $w; $height = $h; $NIMG =imagecreatetruecolor ($Dw, $Dh); IF ($h/$w > $Dh/$Dw) {//height ratio large $width = $Dw; $height = $h * $Dw/$w; $IntNH = $height-$Dh; Imagecopyresampled ($NIMG, $IMG, 0,-$IntNH/1.8, 0, 0, $Dw, $height, $w, $h); } Else {//width ratio is large $height = $Dh; $width = $w * $Dh/$h; $IntNW = $width-$Dw; Imagecopyresampled ($NIMG, $IMG,-$IntNW/1.8,0,0,0, $width, $Dh, $w, $h); } Imagejpeg ($NIMG, $Image); return true; } }; ?> Copy Code 2. Get remote pictures Network picture Path $imgPath = ' http://bbs.it-home.org/phone/compress-img/251139474ba926db3d7850.jpg '; $imgPath = "Http://bbs.it-home.org/userfiles/image/20111125/251139474ba926db3d7850.jpg"; $tempPath = Str_replace (' http://bbs.it-home.org/', ' ', $imgPath);//Replace newline character $name = STRRCHR ($tempPath, "/"); $path = Str_replace ($name, ", $tempPath);//Replace newline character /** * Set up a multi-level directory based on paths path * $dir The target directory $mode permissions, 0700 indicates the highest privilege */ function MakeDir ($dir, $mode = "0700") { if (Strpos ($dir, "/")) { $dir _path = ""; $dir _info = Explode ("/", $dir); foreach ($dir _info as $key = + $value) { $dir _path. = $value; if (!file_exists ($dir _path)) { @mkdir ($dir _path, $mode) or Die ("Failed to create folder"); @chmod ($dir _path, $mode); } else { $dir _path. = "/"; Continue; } $dir _path. = "/"; } return $dir _path; } else { @mkdir ($dir, $mode) or Die ("Setup failed, check permissions"); @chmod ($dir, $mode); return $dir; } }//end MakeDir MakeDir ($path); /** * Get pictures on the server based on URL * $url Server Slice path $filename file name */ function Grabimage ($url, $filename = "") { if ($url = = "") return false; if ($filename = = "") { $ext =STRRCHR ($url, "."); if ($ext! = ". gif" && $ext! = ". jpg" && $ext! = ". png") return false; $filename =date ("Ymdhis"). $ext; } Ob_start (); ReadFile ($url); $img = Ob_get_contents (); Ob_end_clean (); $size = strlen ($img); $FP 2= @fopen ($filename, "a"); Fwrite ($fp 2, $img); Fclose ($fp 2); return $filename; } ?> Copy Code 3. Invoking the example The types of files that are allowed to be uploaded are: echo $path. " "; /**/ $BIGIMG =grabimage ($imgPath, $tempPath); if ($BIGIMG) { Echo ' '; } else { echo "false"; } Compressimg ($BIGIMG, 100,80,1); ?> Copy Code

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