nginx+php real-time generation of different size pictures

The original picture server uses the Windows. NET architecture, in view of the need to generate a variety of size pictures.

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M01/7F/95/wKiom1cjJSSQEzn6AABzdrDHnIQ604.png "title=" QQ picture 20160429171042.png "alt=" Wkiol1cjfoaju6pzaabcg35yrkg456.png "/>

Process Description:

The user from Nginx request the corresponding picture, determine whether there are _200x300 corresponding parameters, if not directly request to the corresponding directory of the original, otherwise continue to determine whether the corresponding cache image has been generated locally, if there is a return has been generated custom size picture, otherwise request PHP dynamic generation.

Nginx Partial configuration:

    server {        listen        80;        server_name  pics.abc.com ;        location / {             root   /var/www/html;             index  index.html index.htm index.php;         error_page   500 502 503 504  / 50x.html;        location = /50x.html {             root   html;         }        location ~ \_ (\d+) x (\ d+) \. (jpg|png|gif|jpeg|bmp) $&nbsP {  //Decide whether to customize the diagram                  try_files  $uri  /temp/$uri  /get.php;    //to determine if a custom diagram has been generated otherwise transferred to/ Get.php                expires       30d;        }         location ~ \.php$ {             fastcgi_pass   127.0.0.1:9000;             fastcgi_index  index.php;             fastcgi_param  SCRIPT_FILENAME   $document _root$ fastcgi_script_name;            include         fastcgi_params;        }         location ~ .*\. (gif|jpg|jpeg|png|bmp) $        {                 expires      30d;         }        }     }

In/var/www/html we mount the Windows directory in read-only mode, modify/etc/fstab, add

\\192.168.2.3\f$\pics.abc.com\pics/var/www/html/pics/cifs Ro,username=user,password=pass 1 2

Then restart the Netfs service, and execute the following command to install the dependent packages

Yum-y Install samba-client cifs-utilsservice netfs restartchkconfig netfs on

The resulting scaling graph is placed in the temp directory of the site directory, such as the requested Http://pics.abc.com/pics/201604/29/abc_200x300.jpg

The resulting picture is placed in the Temp/pics/201604/29/abc_200x300.jpg directory

PHP Script:

Function thumb ($src,  $width,  $height,  $filename,  $mode  =  ' scale ',  $ quality =  ' + ')  {try {         $imageValue  =  getimagesize ($SRC);         $sourceWidth  =  $imageValue [ 0]; //Original width          $sourceHeight  =  $imageValue [1]; / /original          $thumbWidth  =  $width;  //thumbnail width           $thumbHeight  =  $height;  //thumbnail height          $_x = 0;        $_y = 0;          $w  =  $sourceWidth;          $h  =  $sourceHeight;        if  ($mode  ==  ' scale ')  {                if  ($ sourcewidth <=  $thumbWidth  &&  $sourceHeight  <=  $thumbHeight)   {                         $_x = floor (($thumbWidth  -  $sourceWidth)  / 2 );                         $_y = floor (($thumbHeight  -  $sourceHeight)  / &NBSP;2);                          $thumbWidth  =  $sourceWidth;                           $thumbHeight  =  $sourceHeight;                 } else {                         if  ($thumbHeight  * $ sourcewidth >  $thumbWidth  *  $sourceHeight)  {                                   $thumbHeight  = floor ($sourceHeight  * $ width /  $sourceWidth);                                  $_y = floor (($height  -  $thumbHeight)  / 2);                         } else {                                   $thumbWidth  = floor ($ sourcewidth *  $height  /  $sourceHeight);                                  $_x = floor (($width  -  $thumbWidth)  / 2);                          }                 }        } else if  ($mode   ==  ' crop ')  {                if  ($sourceHeight  <  $thumbHeight)  { //If the original size is less than the current size                    $thumbWidth  = floor ($thumbWidth  * $ sourceheight /  $thumbHeight);                  $thumbHeight  =  $sourceHeight;                 }                 if  ($sourceWidth  <  $thumbWidth)  {                           $thumbHeight  = floor ($thumbHeight  *  $sourceWidth  /   $thumbWidth);                           $thumbWidth  =  $sourceWidth;                 }                  $s 1 =  $sourceWidth  /  $sourceHeight;  //original ratio                   $s 2 =  $width  /  $height;  //New chart ratio                  if  ($s 1 ==  $s 2)  {                 } else if  ($s 1 >  $s 2)  {  Full height                            $y  = 0;                          $ax  = floor ($sourceWidth  *  ($thumbHeight  /  $sourceHeight));                          $x  =  ($ax  -  $thumbWidth)  / 2;                          $w  =  $thumbWidth   /  ($thumbHeight  /  $sourceHeight);                 } else { //Full Width                            $x  = 0;                          $ay  = floor ($sourceHeight  *  ($thumbWidth  /  $sourceWidth) );  //simulated original ratio height                           $y  =  ($ay  -  $thumbHeight)  /  2;                          $h  =  $thumbHeight  /  ($thumbWidth  / $ Sourcewidth);                 }         }        switch  ( $imageValue [2])  {               &NBSP;&NBSP;CASE&NBSP;2:  $source  = imagecreatefromjpeg ($SRC);                         break;                 case 1:  $source  = imagecreatefromgif ($SRC);                         break;                 case 3:  $source  =  Imagecreatefrompng ($SRC);                         break;                 case 6:  $source  =  Imagecreatefromwbmp ($SRC);                          break;                 default: defulat ();                 return;        }         header ("Content-type: image/jpeg");         $ Thumb = imagecreatetruecolor ($width,  $height);         Imagefill ($thumb,  0, 0, imagecolorallocate ($thumb,  255, 255, 255));         imagecopyresampled ($thumb,  $source, 0, 0,  $x,  $y,   $width,  $height,  $w,  $h)         imagejpeg ($thumb , null,  $quality)         imagejpeg ($thumb,  $filename,  $quality);         imagedestroy ($THUMB);         imagedestroy ($source);}  catch  (exception  $ex)  {        defulat ();  }} Function defulat ()  {/*         $default _img =  Realpath ('.. /pictures/nopic.gif ');         ob_start ();         header (' content-type:image/jpeg ');         ReadFile ($default _img);         ob_flush ();         flush ();*/echo  ' Error ';} Function mkdirs ($dir) {    if (!is_dir ($dir)) {         if (!mkdirs (dirname ($dir))) {            return false;         }        if (!mkdir ($dir, 0755)) {             return false;         }    }    return true;} $uri =$_server[' Request_uri '; $image =basename ($uri); $temp = './temp/'. DirName ($uri). ' /'; $imgpath = '. '. DirName ($uri). ' /';/*//checks if there is a local file, the original if (File_exists ($temp. $image)) {        ob_start ();         header (' content-type:image/jpeg ');         readfile ($temp. $image);         ob_flush ();         flush ();         exit () ;} *///checks whether the generated picture has ever been generated, is returned if it exists, otherwise regenerates the new figure if (!preg_match ('/_ (\d+)X (\d+)/',  $image,  $wh) {        ob_start ();         header (' content-type:image/jpeg ');         readfile ($imgpath. $image);         ob_flush ();         flush ();         exit ();} $width  =  $WH [1]; $height  =  $WH [2]; $source _img=preg_replace ('/_ (\d+) x (\d+)/',  ',  $image)//For images that are over the length and width, return the original if ($width >=2000 | |   $height >=2000) {Ob_start ();         header (' content-type:image/ JPEG ');         readfile ($imgpath. $source _img);         ob_flush ();         flush ();         exit ();} Picture processing $src= $imgpath. $source _img; $filename = $temp. $image; Mkdirs ($temp);//thumb (Realpath ($src),  $width,  $height,  $filename,  ' crop ',  ' 85 '); Thumb (Realpath ($src),  $width,  $height,  $filename,  ' crop ',  ' 100 ');

PHP Generate dimensions section refer to <php picture automatic cutting to cope with different sizes of display >

This article is from "Maple Night" blog, please be sure to keep this source http://fengwan.blog.51cto.com/508652/1769043

nginx+php real-time generation of different size pictures