php resize image on upload

Question

I got a form where the user is inserting some data and also uploading an image   To deal with the image  I got the following code   define  MAX SIZE    10000     errors   0   image     FILES  fileField    name     uploadedfile     FILES  fileField    tmp name    if  image        filename   stripslashes   FILES  fileField    name          extension   strtolower getExtension  filename        if    extension     jpg    amp  amp    extension     jpeg    amp  amp    extension     png    amp  amp    extension     gif             echo   Unknown Image extension             errors   1        else            newname     product cn  extension            size   filesize   FILES  fileField    tmp name             if   size  gt  MAX SIZE 1024               echo  You have exceeded the size limit                errors   1                    if  extension     jpg      extension     jpeg                  uploadedfile     FILES  file    tmp name                 src   imagecreatefromjpeg  uploadedfile             else if  extension     png                 uploadedfile     FILES  file    tmp name                 src   imagecreatefrompng  uploadedfile             else                src   imagecreatefromgif  uploadedfile                     list  width   height    getimagesize  uploadedfile            newwidth   60           newheight     height  width   newwidth           tmp   imagecreatetruecolor  newwidth   newheight            newwidth1   25           newheight1     height  width   newwidth1           tmp1   imagecreatetruecolor  newwidth1   newheight1           imagecopyresampled  tmp   src  0  0  0  0   newwidth   newheight   width   height           imagecopyresampled  tmp1   src  0  0  0  0   newwidth1   newheight1   width   height            filename       products images  newname            filename1       products images thumbs  newname           imagejpeg  tmp   filename  100      file name also indicates the folder where to save it to         imagejpeg  tmp1   filename1  100           imagedestroy  src           imagedestroy  tmp           imagedestroy  tmp1             getExtension function   function getExtension  str         i   strrpos  str            if    i    return            l   strlen  str  -  i       ext   substr  str  i 1  l       return  ext      I ve wrote some notation in the code since I m not really familiar with those functions   For some reason  it doesn t work  When I m going to the folder  product images  or  product images thumbs   I can t find any image uploaded    Any idea what s wrong with my code  There should be 60px width image  and 25px width image   Note  Variables that you don t know where they were declared such as  product cn were declared before that block of code which works prefectly fine  tested   If you still want a glance at it  feel free to ask for the code   Thanks in advance

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Building onto answer from  zeusstl  for multiple images uploaded  function img resize         input    input-upload-img1      Name of input     maxDim   400    foreach    FILES  input   tmp name   as  file name       list  width   height   type   attr    getimagesize   file name        if    width  gt   maxDim     height  gt   maxDim              target filename    file name           ratio    width  height          if   ratio  gt  1                 new width    maxDim               new height    maxDim  ratio            else                new width    maxDim  ratio               new height    maxDim                     src   imagecreatefromstring  file get contents   file name               dst   imagecreatetruecolor   new width   new height            imagecopyresampled   dst   src  0  0  0  0   new width   new height   width   height            imagedestroy   src            imagepng   dst   target filename       adjust format as needed         imagedestroy   dst

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This was my example that I used to automatically resize every inserted photo to 100 by 50 pixel and image format to jpeg hope this helps too  if  result    maxDimW   100   maxDimH   50  list  width   height   type   attr    getimagesize    FILES  photo    tmp name      if    width  gt   maxDimW     height  gt   maxDimH          target filename     FILES  photo    tmp name         fn     FILES  photo    tmp name         size   getimagesize   fn         ratio    size 0   size 1      width height     if   ratio  gt  1             width    maxDimW           height    maxDimH  ratio        else            width    maxDimW  ratio           height    maxDimH             src   imagecreatefromstring file get contents  fn         dst   imagecreatetruecolor   width   height        imagecopyresampled  dst   src  0  0  0  0   width   height   size 0    size 1          imagejpeg  dst   target filename      adjust format as needed      move uploaded file   FILES  pdf    tmp name    pdf     FILES  pdf    name

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Download library file Zebra Image php belo link  https   drive google com file d 0Bx-7K3oajNTRV1I2UzYySGZFd3M view  resizeimage php   lt  php     require  Zebra Image php          create a new instance of the class       resize image   new Zebra Image            indicate a source image      resize image- gt source path    target file1       ext    photo         indicate a target image      resize image- gt target path    images thumbnil      ext         resize        and if there is an error  show the error message     if    resize image- gt resize 200  200  ZEBRA IMAGE NOT BOXED  -1           from this moment on  work on the resized image      resize image- gt source path    images thumbnil      ext    gt

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If you want to use Imagick out of the box  included with most PHP distributions   it s as easy as      image   new Imagick     image filehandle   fopen  some file jpg    a      image- gt readImageFile  image filehandle     image- gt scaleImage 100 200 FALSE     image icon filehandle   fopen  some file-icon jpg    a      image- gt writeImageFile  image icon filehandle     You will probably want to calculate width and height more dynamically based on the original image   You can get an image s current width and height  using the above example  with  image- gt getImageHeight    and  image- gt getImageWidth

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I followed the steps at https   www w3schools com php php file upload asp and http   www w3bees com 2013 03 resize-image-while-upload-using-php html to produce this solution  In my view  I am using the MVC paradigm  but it could be your  html or  php file  or the technology that you use for your front-end    lt form action  quot       photos upload php quot  method  quot post quot  enctype  quot multipart form-data quot  gt   lt label for  quot quantity quot  gt Width  lt  label gt     lt input type  quot number quot  id  quot picture width quot  name  quot picture width quot  min  quot 10 quot  max  quot 800 quot  step  quot 1 quot  value  quot 500 quot  gt  Select image to upload   lt input type  quot file quot  name  quot fileToUpload quot  id  quot fileToUpload quot  gt   lt input type  quot submit quot  value  quot Upload Image quot  name  quot submit quot  gt   lt  form gt   My upload php   lt  php    Get original image x y   list  w   h    getimagesize   FILES  fileToUpload    tmp name      new height  h   POST  picture width    w     calculate new image size with ratio     ratio   max   POST  picture width    w   new height  h    h   ceil  new height    ratio    x     w -   POST  picture width      ratio    2   w   ceil   POST  picture width      ratio      new file name       path    uploads     POST  picture width    x   new height     basename   FILES  fileToUpload    name      path    uploads   basename   FILES  fileToUpload    name        read binary data from image file     imgString   file get contents   FILES  fileToUpload    tmp name        create image from string     image   imagecreatefromstring  imgString    tmp   imagecreatetruecolor   POST  picture width     new height   imagecopyresampled  tmp   image      0  0       x  0        POST  picture width     new height       w   h    uploadOk   1   imageFileType   strtolower pathinfo  path PATHINFO EXTENSION       Check if image file is a actual image or fake image if isset   POST  quot submit quot            check   getimagesize   FILES  quot fileToUpload quot    quot tmp name quot         if  check     false              echo  quot File is an image -  quot     check  quot mime quot      quot   quot            uploadOk   1        else             echo  quot File is not an image  quot            uploadOk   0             Check if file already exists if  file exists  path         echo  quot Sorry  file already exists  quot        uploadOk   0       Check file size if    FILES  quot fileToUpload quot    quot size quot    gt  500000        echo  quot Sorry  your file is too large  quot        uploadOk   0       Allow certain file formats if  imageFileType     quot jpg quot   amp  amp   imageFileType     quot png quot   amp  amp   imageFileType     quot jpeg quot   amp  amp   imageFileType     quot gif quot          echo  quot Sorry  only JPG  JPEG  PNG  amp  GIF files are allowed  quot        uploadOk   0       Check if  uploadOk is set to 0 by an error if   uploadOk    0        echo  quot Sorry  your file was not uploaded  quot          if everything is ok  try to upload file   else          Save image        switch    FILES  fileToUpload    type              case  image jpeg               imagejpeg  tmp   path  100               break          case  image png               imagepng  tmp   path  0               break          case  image gif               imagegif  tmp   path               break          default              exit              break            echo  quot The file  quot   basename    FILES  quot fileToUpload quot    quot name quot      quot  has been uploaded  quot          cleanup memory        imagedestroy  image       imagedestroy  tmp       gt   The name of the folder where pictures are stored is called  uploads    You need to have that folder previously created and that is where you will see your pictures  It works great for me  NOTE  This is my form   The code is uploading and resizing pictures properly  I used this link as a guide  http   www w3bees com 2013 03 resize-image-while-upload-using-php html  I modified it because in that code they specify both width and height of resized pictures  In my case  I only wanted to specify width  The height I automatically calculated it proportionally  just keeping proper picture proportions  Everything works perfectly  I hope this helps

User · Answer

Here is another nice and easy solution    maxDim   800   file name     FILES  myFile    tmp name    list  width   height   type   attr    getimagesize   file name    if    width  gt   maxDim     height  gt   maxDim          target filename    file name       ratio    width  height      if   ratio  gt  1             new width    maxDim           new height    maxDim  ratio        else            new width    maxDim  ratio           new height    maxDim             src   imagecreatefromstring  file get contents   file name           dst   imagecreatetruecolor   new width   new height        imagecopyresampled   dst   src  0  0  0  0   new width   new height   width   height        imagedestroy   src        imagepng   dst   target filename       adjust format as needed     imagedestroy   dst        Reference  PHP resize image proportionally with max width or weight  Edit  Cleaned up and simplified the code a bit  Thanks  jan-mirus for your comment

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You can use Imagine library also  It uses GD and Imagick

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index php      lt  DOCTYPE html gt   lt html gt   lt head gt       lt title gt PHP Image resize to upload lt  title gt   lt  head gt   lt body gt     lt div class  container  gt       lt form action  pro php  method  post  enctype  multipart form-data  gt           lt input type  file  name  image    gt            lt input type  submit  name  submit  value  Submit    gt       lt  form gt   lt  div gt     lt  body gt   lt  html gt    upload php    lt  php   if isset   POST  submit           if is array   FILES                file     FILES  image    tmp name              sourceProperties   getimagesize  file            fileNewName   time             folderPath    upload             ext   pathinfo   FILES  image    name    PATHINFO EXTENSION            imageType    sourceProperties 2             switch   imageType                  case IMAGETYPE PNG                   imageResourceId   imagecreatefrompng  file                     targetLayer   imageResize  imageResourceId  sourceProperties 0   sourceProperties 1                    imagepng  targetLayer  folderPath   fileNewName    thump     ext                   break                case IMAGETYPE GIF                   imageResourceId   imagecreatefromgif  file                     targetLayer   imageResize  imageResourceId  sourceProperties 0   sourceProperties 1                    imagegif  targetLayer  folderPath   fileNewName    thump     ext                   break                case IMAGETYPE JPEG                   imageResourceId   imagecreatefromjpeg  file                     targetLayer   imageResize  imageResourceId  sourceProperties 0   sourceProperties 1                    imagejpeg  targetLayer  folderPath   fileNewName    thump     ext                   break                default                  echo  Invalid Image type                    exit                  break                      move uploaded file  file   folderPath   fileNewName        ext           echo  Image Resize Successfully              function imageResize  imageResourceId  width  height           targetWidth  200       targetHeight  200         targetLayer imagecreatetruecolor  targetWidth  targetHeight       imagecopyresampled  targetLayer  imageResourceId 0 0 0 0  targetWidth  targetHeight   width  height         return  targetLayer      gt

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You can use this library to manipulate the image while uploading  http   www verot net php class upload htm

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This thing worked for me  No any external liabraries used      define   MAX SIZE   3000     function getExtension  str              i   strrpos  str                if    i    return                 l   strlen  str  -  i            ext   substr  str  i 1  l            return  ext        errors 0    if   SERVER  REQUEST METHOD       POST           image    FILES  image-1    name         uploadedfile     FILES  image-1    tmp name          if   image                   filename   stripslashes   FILES  image-1    name               extension   getExtension  filename            extension   strtolower  extension      if    extension     jpg    amp  amp    extension     jpeg    amp  amp    extension     png    amp  amp    extension     gif                           echo  Unknown Extension                        else              size filesize   FILES  image-1    tmp name       if   size  gt  MAX SIZE 1024        echo  File Size Excedeed           if  extension   jpg      extension   jpeg       uploadedfile     FILES  image-1    tmp name     src   imagecreatefromjpeg  uploadedfile      else if  extension   png      uploadedfile     FILES  image-1    tmp name     src   imagecreatefrompng  uploadedfile      else     src   imagecreatefromgif  uploadedfile   echo  scr     list  width  height  getimagesize  uploadedfile      newwidth 1000   newheight   height  width   newwidth   tmp imagecreatetruecolor  newwidth  newheight      newwidth1 1000   newheight1   height  width   newwidth1   tmp1 imagecreatetruecolor  newwidth1  newheight1    imagecopyresampled  tmp  src 0 0 0 0  newwidth  newheight  width  height    imagecopyresampled  tmp1  src 0 0 0 0  newwidth1  newheight1  width  height      filename       images product-image Cars      FILES  image-1    name      filename1       images product-image Cars small     FILES  image-1    name       imagejpeg  tmp  filename 100    imagejpeg  tmp1  filename1 100    imagedestroy  src   imagedestroy  tmp   imagedestroy  tmp1

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lt form action   lt  php echo   SERVER  PHP SELF       gt   method  post  enctype  multipart form-data  id  something  class  uniForm  gt       lt input name  new image  id  new image  size  30  type  file  class  fileUpload    gt       lt button name  submit  type  submit  class  submitButton  gt Upload Image lt  button gt   lt  form gt    lt  php     if isset   POST  submit            if  isset    FILES  new image                               imagename     FILES  new image    name               source     FILES  new image    tmp name               target    images    imagename             type   FILES  new image    type               if  type   image jpeg      type   image jpg              move uploaded file  source   target               orginal image making part             imagepath    imagename             save    images      imagepath    This is the new file you saving            file    images      imagepath    This is the original file           list  width   height    getimagesize  file               modwidth   1000             diff    width    modwidth             modheight    height    diff                tn   imagecreatetruecolor  modwidth   modheight               image   imagecreatefromjpeg  file              imagecopyresampled  tn   image  0  0  0  0   modwidth   modheight   width   height              echo  Large image   lt img src  images    imagepath    gt  lt br gt                                   imagejpeg  tn   save  100                 thumbnail image making part            save    images thumb      imagepath    This is the new file you saving            file    images      imagepath    This is the original file              list  width   height    getimagesize  file               modwidth   150             diff    width    modwidth             modheight    height    diff             tn   imagecreatetruecolor  modwidth   modheight               image   imagecreatefromjpeg  file              imagecopyresampled  tn   image  0  0  0  0   modwidth   modheight   width   height              echo  Thumbnail   lt img src  images sml    imagepath    gt              imagejpeg  tn   save  100                        else              echo  File is not image                                 gt

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A full example with Zebra Image library  that I think is so easy and useful  There are a lot of code  but if you read it  there are a lot of comments too so you can make copy and paste to use it quickly  This example validates image format  size and replace image size with custom resolution  There is Zebra library and documentation  download only Zebra Image php file   Explanation   An image is uploaded to server by uploadFile function  If image has been uploaded correctly  we recover this image and its path by getUserFile function  Resize image to custom width and height and replace at same path   Main function private function uploadImage                  target file    quot    img blog  quot          this function could be in the same PHP file or class  I use a Helper  see bellow      if UsersUtils  uploadFile  target file   this- gt selectedBlog- gt getId         This function is at same Helper class    The image will be returned allways if there isn t errors uploading it  for this reason there aren t validations here           blogPhotoPath   UsersUtils  getUserFile  target file   this- gt selectedBlog- gt getId                         create a new instance of the class          imageHelper   new Zebra Image               indicate a source image          imageHelper- gt source path    blogPhotoPath             indicate a target image          imageHelper- gt target path    blogPhotoPath             since in this example we re going to have a jpeg file  let s set the output            image s quality          imageHelper- gt jpeg quality   100              some additional properties that can be set            read about them in the documentation          imageHelper- gt preserve aspect ratio   true           imageHelper- gt enlarge smaller images   true           imageHelper- gt preserve time   true           imageHelper- gt handle exif orientation tag   true             resize            and if there is an error  show the error message         if    imageHelper- gt resize 450  310  ZEBRA IMAGE CROP CENTER                    if there was an error  let s see what the error is about             switch   imageHelper- gt error                    case 1                      echo  Source file could not be found                        break                  case 2                      echo  Source file is not readable                        break                  case 3                      echo  Could not write target file                        break                  case 4                      echo  Unsupported source file format                        break                  case 5                      echo  Unsupported target file format                        break                  case 6                      echo  GD library version does not support target file format                        break                  case 7                      echo  GD library is not installed                        break                  case 8                      echo   quot chmod quot  command is disabled via configuration                        break                  case 9                      echo   quot exif read data quot  function is not available                       break                          else               echo  Image uploaded with new size without erros                       External functions or use at same PHP file removing public static qualifiers      public static function uploadFile  targetDir   fileName                   File upload path      fileUploaded     FILES  quot input-file quot              fileType   pathinfo basename  fileUploaded  quot name quot    PATHINFO EXTENSION        targetFilePath    targetDir    fileName       fileType           if empty  fileName            echo  Error  any file found inside this path           return false                    Allow certain file formats      allowTypes   array  jpg   png   jpeg   gif   pdf        if in array  fileType   allowTypes              Max buffer length 8M         var dump ob get length             if ob get length    gt  8388608                echo  Error  Max size available 8MB               return false                       Upload file to server         if move uploaded file  fileUploaded  quot tmp name quot     targetFilePath                return true           else              echo  Error  error uploading image                   else          echo  Error  Only files JPG  JPEG  PNG  GIF y PDF types are allowed             return false     public static function getUserFile  targetDir   userId         userImages   glob  targetDir  userId            return  empty  userImages     userImages 0    null

[php] php resize image on upload

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