Resize image in PHP

Question

I m wanting to write some PHP code which automatically resizes any image uploaded via a form to 147x147px  but I have no idea how to go about it  I m a relative PHP novice     So far  I ve got images uploading successfully  filetypes being recognised and names cleaned up  but I d like to add the resize functionality into the code  For example  I ve got a test image which is 2 3MB  and 1331x1331 in dimension  and I d like the code to size it down  which I m guessing will dramatically compress the filesize of the image  too   So far  I ve got the following   if    FILES                      Put file properties into variables                  file name     FILES  profile-image    name                     file size     FILES  profile-image    size                     file tmp name     FILES  profile-image    tmp name                       Determine filetype                 switch    FILES  profile-image    type                          case  image jpeg    ext    jpg   break                      case  image png    ext    png   break                      default   ext       break                                     if   ext                          Check filesize                     if   file size  lt  500000                              Process file - clean up filename and move to safe location                          n     file name                            n   ereg replace    A-Za-z0-9          n                            n   strtolower  n                            n    avatars  n                           move uploaded file  file tmp name   n                         else                            bad message    Please ensure your chosen file is less than 5MB                                            else                        bad message    Please ensure your image is of filetype  jpg or png                                     query    INSERT INTO users  image  VALUES    n     mysql query  query  or die  Insert failed      mysql error       lt br   gt      query

User · Answer

I created an easy-to-use library for image resizing. It can be found here on Github.

An example of how to use the library:

// Include PHP Image Magician library
require_once('php_image_magician.php');

// Open JPG image
$magicianObj = new imageLib('racecar.jpg');

// Resize to best fit then crop (check out the other options)
$magicianObj -> resizeImage(100, 200, 'crop');

// Save resized image as a PNG (or jpg, bmp, etc)
$magicianObj -> saveImage('racecar_small.png');

Other features, should you need them, are:

Quick and easy resize - Resize to landscape, portrait, or auto
Easy crop
Add text
Quality adjustment
Watermarking
Shadows and reflections
Transparency support
Read EXIF metadata
Borders, Rounded corners, Rotation
Filters and effects
Image sharpening
Image type conversion
BMP support

User · Answer

IMPORTANT  In the case of animation  animated webp or gif  resizing  the result will be a not animated  but resized image from the first frame   The original animation remains intact      I created this to my php 7 2 project  example imagebmp sure  PHP 7    7 2 0   php manual function imagebmp  about techfry com php-tutorial  with GD2   so nothing 3rd party library  and very similar to the answer of Nico Bistolfi  but works with the all five basic image mimetype  png  jpeg  webp  bmp and gif   creating a new resized file  without modifying the original one  and the all stuff in one function and ready to use  copy and paste to your project    You can set the extension of the new file with the fifth parameter  or just leave it  if you want keep the orignal    function createResizedImage      string  imagePath           string  newPath           int  newWidth   0      int  newHeight   0      string  outExt    DEFAULT       string       if    newPath or  file exists   imagePath             return null              types    IMAGETYPE JPEG  IMAGETYPE PNG  IMAGETYPE GIF  IMAGETYPE BMP  IMAGETYPE WEBP        type   exif imagetype   imagePath        if   in array   type   types             return null             list   width   height    getimagesize   imagePath         outBool   in array   outExt    jpg    jpeg    png    gif    bmp    webp          switch   type            case IMAGETYPE JPEG               image   imagecreatefromjpeg   imagePath               if    outBool   outExt    jpg               break          case IMAGETYPE PNG               image   imagecreatefrompng   imagePath               if    outBool   outExt    png               break          case IMAGETYPE GIF               image   imagecreatefromgif   imagePath               if    outBool   outExt    gif               break          case IMAGETYPE BMP               image   imagecreatefrombmp   imagePath               if    outBool   outExt    bmp               break          case IMAGETYPE WEBP               image   imagecreatefromwebp   imagePath               if    outBool   outExt    webp               newImage   imagecreatetruecolor   newWidth   newHeight          TRANSPARENT BACKGROUND      color   imagecolorallocatealpha   newImage  0  0  0  127     fill transparent back     imagefill   newImage  0  0   color       imagesavealpha   newImage  true          ROUTINE     imagecopyresampled   newImage   image  0  0  0  0   newWidth   newHeight   width   height           Rotate image on iOS     if function exists  exif read data    amp  amp   exif   exif read data  imagePath   IFD0                  if isset  exif  Orientation     amp  amp  isset  exif  Make     amp  amp   empty  exif  Orientation     amp  amp  preg match    apple ios iphone  i    exif  Make                   switch  exif  Orientation                      case 8                      if   width  gt   height   newImage   imagerotate  newImage 90 0                       break                  case 3                       newImage   imagerotate  newImage 180 0                       break                  case 6                       newImage   imagerotate  newImage -90 0                       break                                     switch  true            case in array   outExt    jpg    jpeg      success   imagejpeg   newImage   newPath               break          case  outExt      png    success   imagepng   newImage   newPath               break          case  outExt      gif    success   imagegif   newImage   newPath               break          case   outExt      bmp    success   imagebmp   newImage   newPath               break          case   outExt      webp    success   imagewebp   newImage   newPath              if    success            return null             return  newPath

User · Answer

This resource broken link  is also worth considering - some very tidy code that uses GD  However  I modified their final code snippet to create this function which meets the OPs requirements    function store uploaded image  html element name   new img width   new img height              target dir    quot your-uploaded-images-folder  quot        target file    target dir   basename   FILES  html element name   quot name quot               image   new SimpleImage         image- gt load   FILES  html element name   tmp name          image- gt resize  new img width   new img height        image- gt save  target file       return  target file    return name of saved file in case you want to store it in you database or show confirmation message to user         You will also need to include this PHP file     lt  php        File  SimpleImage php   Author  Simon Jarvis   Copyright  2006 Simon Jarvis   Date  08 11 06   Link  http   www white-hat-web-design co uk blog resizing-images-with-php      This program is free software  you can redistribute it and or   modify it under the terms of the GNU General Public License   as published by the Free Software Foundation  either version 2   of the License  or  at your option  any later version      This program is distributed in the hope that it will be useful    but WITHOUT ANY WARRANTY  without even the implied warranty of   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE  See the   GNU General Public License for more details    http   www gnu org licenses gpl html        class SimpleImage        var  image     var  image type       function load  filename             image info   getimagesize  filename          this- gt image type    image info 2         if   this- gt image type    IMAGETYPE JPEG                 this- gt image   imagecreatefromjpeg  filename           elseif   this- gt image type    IMAGETYPE GIF                 this- gt image   imagecreatefromgif  filename           elseif   this- gt image type    IMAGETYPE PNG                 this- gt image   imagecreatefrompng  filename                   function save  filename   image type IMAGETYPE JPEG   compression 75   permissions null            if   image type    IMAGETYPE JPEG              imagejpeg  this- gt image  filename  compression           elseif   image type    IMAGETYPE GIF                imagegif  this- gt image  filename           elseif   image type    IMAGETYPE PNG                imagepng  this- gt image  filename                 if   permissions    null               chmod  filename  permissions                   function output  image type IMAGETYPE JPEG            if   image type    IMAGETYPE JPEG              imagejpeg  this- gt image           elseif   image type    IMAGETYPE GIF                imagegif  this- gt image           elseif   image type    IMAGETYPE PNG                imagepng  this- gt image                   function getWidth             return imagesx  this- gt image           function getHeight             return imagesy  this- gt image           function resizeToHeight  height             ratio    height    this- gt getHeight           width    this- gt getWidth      ratio         this- gt resize  width  height             function resizeToWidth  width           ratio    width    this- gt getWidth           height    this- gt getheight      ratio         this- gt resize  width  height             function scale  scale           width    this- gt getWidth      scale 100         height    this- gt getheight      scale 100         this- gt resize  width  height             function resize  width  height           new image   imagecreatetruecolor  width   height         imagecopyresampled  new image   this- gt image  0  0  0  0   width   height   this- gt getWidth     this- gt getHeight            this- gt image    new image                   gt

User · Answer

I would suggest an easy way   function resize  file   width   height        switch pathinfo  file   extension              case  png   return imagepng imagescale imagecreatefrompng  file    width   height    file           case  gif   return imagegif imagescale imagecreatefromgif  file    width   height    file           default   return imagejpeg imagescale imagecreatefromjpeg  file    width   height    file

User · Answer

You can give a try to TinyPNG PHP library  Using this library your image gets optimized automatically during resizing process  All you need to install the library and get an API key from https   tinypng com developers  To install a library  run the below command   composer require tinify tinify   After that  your code is as follows   require once  vendor autoload php      Tinify setKey  YOUR API KEY      source    Tinify fromFile  large jpg      image to be resize  resized    source- gt resize array       method    gt   fit        width    gt  150       height    gt  100      resized- gt toFile  thumbnail jpg      resized image   I have a written a blog on the same topic http   artisansweb net resize-image-php-using-tinypng

User · Answer

Simple Use PHP function  imagescale   Syntax  imagescale    image    new width    new height    Example  Step  1 Read the file  image name     path of Image Name of Image jpg png          Step  2  Load the Image File   image   imagecreatefromjpeg  image name      For JPEG   or   image   imagecreatefrompng  image name        For PNG  Step  3  Our Life-saver comes in       Scale the image     imgResized   imagescale  image   500  400      width 500 and height   400      imgResized is our final product  Note  imagescale will work for  PHP 5  gt   5 5 0  PHP 7  Source   Click to Read more

User · Answer

Here is an extended version of the answer  Ian Atkin  gave  I found it worked extremely well  For larger images that is     You can actually make smaller images larger if you re not careful   Changes   - Supports jpg jpeg png gif bmp files - Preserves transparency for  png and  gif - Double checks if the the size of the original isnt already smaller - Overrides the image given directly  Its what I needed   So here it is  The default values of the function are the  golden rule   function resize image  file   w   1200   h   741   crop   false              try               ext   pathinfo storage path      file  PATHINFO EXTENSION              list  width   height    getimagesize  file                 if the image is smaller we dont resize            if   w  gt   width  amp  amp   h  gt   height                   return true                           r    width    height             if   crop                   if   width  gt   height                        width   ceil  width -   width   abs  r -  w    h                      else                       height   ceil  height -   height   abs  r -  w    h                                      newwidth    w                  newheight    h               else                  if   w    h  gt   r                        newwidth    h    r                      newheight    h                   else                       newheight    w    r                      newwidth    w                                            dst   imagecreatetruecolor  newwidth   newheight               switch   ext                   case  jpg                  case  jpeg                       src   imagecreatefromjpeg  file                      break                 case  png                       src   imagecreatefrompng  file                      imagecolortransparent  dst  imagecolorallocatealpha  dst  0  0  0  127                       imagealphablending  dst  false                      imagesavealpha  dst  true                      break                 case  gif                       src   imagecreatefromgif  file                      imagecolortransparent  dst  imagecolorallocatealpha  dst  0  0  0  127                       imagealphablending  dst  false                      imagesavealpha  dst  true                      break                 case  bmp                       src   imagecreatefrombmp  file                      break                 default                     throw new Exception  Unsupported image extension found       ext                      break                           result   imagecopyresampled  dst   src  0  0  0  0   newwidth   newheight   width   height              switch   ext                   case  bmp                      imagewbmp  dst   file                      break                 case  gif                      imagegif  dst   file                      break                 case  jpg                  case  jpeg                      imagejpeg  dst   file                      break                 case  png                      imagepng  dst   file                      break                          return true           catch  Exception  err                  LOG THE ERROR HERE             return false

User · Answer

ZF cake    lt  php  class FkuController extends Zend Controller Action      var  image    var  image type     public function store uploaded image  html element name   new img width   new img height          target dir   APPLICATION PATH         public 1         target file    target dir   basename   FILES  html element name   name             image   new SimpleImage         this- gt load   FILES  html element name   tmp name          this- gt resize  new img width   new img height        this- gt save  target file       return  target file         return name of saved file in case you want to store it in you database or show confirmation message to user      public function load  filename            image info   getimagesize  filename          this- gt image type    image info 2         if   this- gt image type    IMAGETYPE JPEG                this- gt image   imagecreatefromjpeg  filename           elseif   this- gt image type    IMAGETYPE GIF                this- gt image   imagecreatefromgif  filename           elseif   this- gt image type    IMAGETYPE PNG                this- gt image   imagecreatefrompng  filename                  public function save  filename   image type IMAGETYPE JPEG   compression 75   permissions null           if   image type    IMAGETYPE JPEG              imagejpeg  this- gt image  filename  compression           elseif   image type    IMAGETYPE GIF               imagegif  this- gt image  filename           elseif   image type    IMAGETYPE PNG               imagepng  this- gt image  filename                 if   permissions    null              chmod  filename  permissions                  public function output  image type IMAGETYPE JPEG           if   image type    IMAGETYPE JPEG              imagejpeg  this- gt image           elseif   image type    IMAGETYPE GIF               imagegif  this- gt image           elseif   image type    IMAGETYPE PNG               imagepng  this- gt image                  public function getWidth            return imagesx  this- gt image          public function getHeight            return imagesy  this- gt image          public function resizeToHeight  height            ratio    height    this- gt getHeight           width    this- gt getWidth      ratio         this- gt resize  width  height           public function resizeToWidth  width           ratio    width    this- gt getWidth           height    this- gt getheight      ratio         this- gt resize  width  height           public function scale  scale           width    this- gt getWidth      scale 100         height    this- gt getheight      scale 100         this- gt resize  width  height           public function resize  width  height           new image   imagecreatetruecolor  width   height         imagecopyresampled  new image   this- gt image  0  0  0  0   width   height   this- gt getWidth     this- gt getHeight            this- gt image    new image          public function savepicAction         ini set  display errors   1       ini set  display startup errors   1       error reporting E ALL         this- gt  helper- gt layout  - gt disableLayout         this- gt  helper- gt viewRenderer- gt setNoRender         this- gt  response- gt setHeader  Access-Control-Allow-Origin               this- gt db   Application Model Db  db load                 ouser     POST  ousername             fdata    empty         if  isset   FILES  picture     amp  amp    FILES  picture    size    gt  0             file size     FILES  picture    size             tmpName      FILES  picture    tmp name                 Determine filetype         switch    FILES  picture    type                  case  image jpeg    ext    jpg   break              case  image png    ext    png   break              case  image jpg    ext    jpg   break              case  image bmp    ext    bmp   break              case  image gif    ext    gif   break              default   ext       break                     if  ext                if  file size lt 400000                   img    this- gt store uploaded image  picture   90 82                  fp        fopen  tmpName   r                 fp   fopen  img   r                 fdata   fread  fp  filesize  tmpName                         fdata   base64 encode  fdata               fclose  fp                                            if  fdata   empty                   else            this- gt db- gt update  users              array               picture    gt   fdata                                       array  username      gt   ouser

User · Answer

You need to use either PHP s ImageMagick or GD functions to work with images   With GD  for example  it s as simple as     function resize image  file   w   h   crop FALSE        list  width   height    getimagesize  file        r    width    height      if   crop            if   width  gt   height                 width   ceil  width-  width abs  r- w  h               else                height   ceil  height-  height abs  r- w  h                        newwidth    w           newheight    h        else           if   w  h  gt   r                 newwidth    h  r               newheight    h            else                newheight    w  r               newwidth    w                       src   imagecreatefromjpeg  file        dst   imagecreatetruecolor  newwidth   newheight       imagecopyresampled  dst   src  0  0  0  0   newwidth   newheight   width   height        return  dst      And you could call this function  like so      img   resize image     path to some image jpg     200  200     From personal experience  GD s image resampling does dramatically reduce file size too  especially when resampling raw digital camera images

User · Answer

private function getTempImage  url   tempName      tempPath    tempFilePath     tempName     png      source image   imagecreatefrompng  url      check type depending on your necessities     source imagex   imagesx  source image      source imagey   imagesy  source image      dest imagex   861     My default value    dest imagey   96      My default value     dest image   imagecreatetruecolor  dest imagex   dest imagey      imagecopyresampled  dest image   source image  0  0  0  0   dest imagex   dest imagey   source imagex   source imagey      imagejpeg  dest image   tempPath  100      return  tempPath     This is an adapted solution based on this great explanation  This guy made a step by step explanation  Hope all enjoy it

User · Answer

I found a mathematical way to get this job done  Github repo - https   github com gayanSandamal easy-php-image-resizer  Live example - https   plugins nayague com easy-php-image-resizer    lt  php   path for the image  source url    2018-04-01-1522613288 PNG      separate the file name and the extention  source url parts   pathinfo  source url    filename    source url parts  filename     extension    source url parts  extension       define the quality from 1 to 100  quality   10     detect the width and the height of original image list  width   height    getimagesize  source url    width   height     define any width that you want as the output  mine is 200px   after width   200     resize only when the original image is larger than expected with    this helps you to avoid from unwanted resizing  if   width  gt   after width           get the reduced width      reduced width     width -  after width         now convert the reduced width to a percentage and round it to 2 decimal places      reduced radio   round   reduced width    width    100  2          ALL GOOD  let s reduce the same percentage from the height and round it to 2 decimal places      reduced height   round   height   100     reduced radio  2         reduce the calculated height from the original height      after height    height -  reduced height         Now detect the file extension       if the file extension is  jpg    jpeg    JPG  or  JPEG      if   extension     jpg      extension     jpeg      extension     JPG      extension     JPEG               then return the image as a jpeg image for the next step          img   imagecreatefromjpeg  source url         elseif   extension     png      extension     PNG               then return the image as a png image for the next step          img   imagecreatefrompng  source url         else             show an error message if the file extension is not available         echo  image extension is not supporting                HERE YOU GO          Let s do the resize thing       imagescale  returned image    width of the resized image    height of the resized image    quality of the resized image         imgResized   imagescale  img   after width   after height   quality          now save the resized image with a suffix called  -resized  and with its extension       imagejpeg  imgResized   filename    -resized    extension          Finally frees any memory associated with image         NOTE THAT THIS WONT DELETE THE IMAGE     imagedestroy  img       imagedestroy  imgResized       gt

User · Answer

I hope is will work for you                  Image re-size             param int  width             param int  height                     function ImageResize  width   height   img name                               Get original file size                    list  w   h    getimagesize   FILES  logo image    tmp name                          ratio    w    h                   size    width                    width    height   min  size  max  w   h                     if   ratio  lt  1                         width    height    ratio                    else                        height    width    ratio                                          Calculate new image size                     ratio   max  width  w   height  h                    h   ceil  height    ratio                    x     w -  width    ratio    2                   w   ceil  width    ratio                      set new file name                     path    img name                       Save image                    if   FILES  logo image    type     image jpeg                                            Get binary data from image                         imgString   file get contents   FILES  logo image    tmp name                            create image from string                         image   imagecreatefromstring  imgString                        tmp   imagecreatetruecolor  width   height                       imagecopyresampled  tmp   image  0  0   x  0   width   height   w   h                       imagejpeg  tmp   path  100                                     else if   FILES  logo image    type     image png                                          image   imagecreatefrompng   FILES  logo image    tmp name                          tmp   imagecreatetruecolor  width  height                       imagealphablending  tmp  false                       imagesavealpha  tmp  true                       imagecopyresampled  tmp   image 0 0  x 0  width  height  w   h                       imagepng  tmp   path  0                                     else if   FILES  logo image    type     image gif                                          image   imagecreatefromgif   FILES  logo image    tmp name                           tmp   imagecreatetruecolor  width  height                        transparent   imagecolorallocatealpha  tmp  0  0  0  127                       imagefill  tmp  0  0   transparent                       imagealphablending  tmp  true                         imagecopyresampled  tmp   image 0 0 0 0  width  height  w   h                       imagegif  tmp   path                                     else                                       return false                                     return true                  imagedestroy  image                   imagedestroy  tmp

User · Answer

If you dont care about the aspect ration  i e you want to force the image to a particular dimension   here is a simplified answer     for jpg  function resize imagejpg  file   w   h       list  width   height    getimagesize  file       src   imagecreatefromjpeg  file       dst   imagecreatetruecolor  w   h      imagecopyresampled  dst   src  0  0  0  0   w   h   width   height      return  dst         for png function resize imagepng  file   w   h       list  width   height    getimagesize  file       src   imagecreatefrompng  file       dst   imagecreatetruecolor  w   h      imagecopyresampled  dst   src  0  0  0  0   w   h   width   height      return  dst        for gif function resize imagegif  file   w   h       list  width   height    getimagesize  file       src   imagecreatefromgif  file       dst   imagecreatetruecolor  w   h      imagecopyresampled  dst   src  0  0  0  0   w   h   width   height      return  dst      Now let s handle the upload part   First step  upload the file to your desired directory  Then called one of the above functions based on file type  jpg  png or gif  and pass the absolute path of your uploaded file as below       jpg  change the dimension 750  450 to your desired values   img   resize imagejpg  path image jpg   750  450     The return value  img is a resource object  We can save to a new location or override the original as below       again for jpg  imagejpeg  img   path newimage jpg      Hope this helps someone  Check these links for more on resizing  Imagick  resizeImage and  imagejpeg

[php] Resize image in PHP

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