Generate a thumbnail based on the request and save it to the Linux image server.

<? Php <br/> $ picid = $ _ Get ['imgid']; <br/> $ pictypes = ". ". $ _ Get ['imgtype']; <br/> $ picwidth = $ _ Get ['imgwidth']; <br/> if ($ picid! = "") <Br/>{< br/> // a thumbnail is requested. <br/> if ($ picwidth> 0) {<br/> // If the thumbnail exists <br/> If (file_exists ($ picid. "_". $ picwidth. $ pictypes) <br/>{< br/> outputimg ($ picid. "_". $ picwidth. $ pictypes); <br/>}else <br/>{< br/> If (file_exists ($ picid. "_ 0 ". $ pictypes) {<br/> // generate a thumbnail directly if no thumbnail exists <br/> resizeimg ($ picid. "_ 0 ". $ pictypes, $ picwidth, $ picwidth, $ picid. "_". $ picwidth. $ pictypes); <br/> // output <br/> outputimg ($ picid. "_". $ picwidt H. $ pictypes); <br/>}else <br/>{< br/> // If the larger image does not exist <br/> resizeimg('nodefaultimage.gif ', $ picwidth, $ picwidth, nodefaultimage. "_". $ picwidth. ". GIF "); <br/> // output <br/> outputimg ($ picid. "_". $ picwidth. $ pictypes ); <br/>}< br/> // determines whether a large image exists in the file. <br/> If (file_exists ($ picid. "_ 0 ". $ pictypes) <br/>{< br/> $ img_file = $ picid. "_ 0 ". $ pictypes; <br/> outputimg ($ img_file); <br/>}< br/> else <br/>{< br/> // for Example If no image exists, <br/> $ img_file = 'nodefaultimage.gif '; <br/> outputimg ($ img_file ); <br/>}< br/> // output image <br/> function outputimg ($ img_file) <br/>{< br/> $ fp = fopen ($ img_file, 'rb'); <br/> $ content = fread ($ FP, filesize ($ img_file); // binary data <br/> fclose ($ FP); <br/> header ('content-type: image/gif '); <br/> echo $ content; <br/>}< br/>/** <br/> * generate a thumbnail <br/> * $ srcname ---- path of the original image <br/> * $ newwidth, $ newheight- --- Maximum width and height of the thumbnails respectively <br/> * $ newname ---- the thumbnail file name (including path) <br/> * @ Param string $ srcname <br/> * @ Param int $ newwidth <br/> * @ Param int $ newheight <br/> * @ Param string $ newname <br/> * return viod <br/> */<br/> function resizeimg ($ srcname, $ newwidth, $ newheight, $ newname = "") <br/>{< br/> if ($ newname = "") <br/>{< br/> $ namearr = explode ('. ', $ srcname); <br/> $ expname = array_pop ($ namearr); <br/> $ expname = $ expname; <br/> Array_push ($ namearr, $ expname); <br/> $ newname = implode ('. ', $ namearr); <br/>}< br/> $ info = ""; <br/> $ DATA = getimagesize ($ srcname, $ info ); <br/> switch ($ data [2]) <br/>{< br/> case 1: <br/> If (! Function_exists ("imagecreatefromgif") {<br/> echo "your GD library cannot use images in GIF format. use JPEG or PNG format! Return "; <br/> exit (); <br/>}< br/> $ im = imagecreatefromgif ($ srcname); <br/> break; <br/> case 2: <br/> If (! Function_exists ("imagecreatefromjpeg") {<br/> echo "your GD library cannot use images in JPEG format. Please use images in other formats! Return "; <br/> exit (); <br/>}< br/> $ im = imagecreatefromjpeg ($ srcname); <br/> break; <br/> case 3: <br/> $ im = imagecreatefrompng ($ srcname); <br/> break; <br/>}< br/> $ srcw = imagesx ($ IM); <br/> $ srch = imagesy ($ IM ); <br/> $ newwidthh = $ newwidth/$ newheight; <br/> $ srcwh = $ srcw/$ srch; <br/> if ($ newwidthh <= $ srcwh) {<br/> $ ftow = $ newwidth; <br/> $ ftoh = $ ftow * ($ srch/$ srcw ); <br/>}< br/> else {<br/> $ ftoh = $ newhe Ight; <br/> $ ftow = $ ftoh * ($ srcw/$ srch ); <br/>}< br/> if ($ srcw> $ newwidth | $ srch> $ newheight) <br/>{< br/> If (function_exists ("imagecreatetruecolor") <br/>{< br/>@$ ni = imagecreatetruecolor ($ ftow, $ ftoh ); <br/> if ($ Ni) imagecopyresampled ($ Ni, $ im, 0, 0, 0, $ ftow, $ ftoh, $ srcw, $ srch ); <br/> else <br/>{< br/> $ ni = imagecreate ($ ftow, $ ftoh); <br/> imagecopyresized ($ Ni, $ im, 0, 0, 0, 0, $ ftow, $ ftoh, $ srcw, $ srch); <BR/>}< br/> else <br/>{< br/> $ ni = imagecreate ($ ftow, $ ftoh ); <br/> imagecopyresized ($ Ni, $ im, 0, 0, 0, $ ftow, $ ftoh, $ srcw, $ srch ); <br/>}< br/> If (function_exists ('imagejpeg ') imagejpeg ($ Ni, $ newname); <br/> else imagepng ($ Ni, $ newname); <br/> imagedestroy ($ Ni); <br/>}< br/> imagedestroy ($ IM); <br/>}< br/>?>