Crop image in PHP

Question

The code below crops the image well  which is what i want  but for larger images  it wotn work as well  Is there any way of  zooming out of the image   Idealy i would be able to have each image roughly the same size before cropping so that i would get good results each time  Code is   lt  php   image     GET  src       the image to crop  dest image    images cropped whatever jpg      make sure the directory is writeable   img   imagecreatetruecolor  200   150     org img   imagecreatefromjpeg  image    ims   getimagesize  image   imagecopy  img  org img  0  0  20  20  200  150   imagejpeg  img  dest image 90   imagedestroy  img   echo   lt img src     dest image     gt  lt p gt

User · Accepted Answer

If you are trying to generate thumbnails, you must first resize the image using imagecopyresampled();. You must resize the image so that the size of the smaller side of the image is equal to the corresponding side of the thumb.

For example, if your source image is 1280x800px and your thumb is 200x150px, you must resize your image to 240x150px and then crop it to 200x150px. This is so that the aspect ratio of the image won't change.

Here's a general formula for creating thumbnails:

$image = imagecreatefromjpeg($_GET['src']);
$filename = 'images/cropped_whatever.jpg';

$thumb_width = 200;
$thumb_height = 150;

$width = imagesx($image);
$height = imagesy($image);

$original_aspect = $width / $height;
$thumb_aspect = $thumb_width / $thumb_height;

if ( $original_aspect >= $thumb_aspect )
{
   // If image is wider than thumbnail (in aspect ratio sense)
   $new_height = $thumb_height;
   $new_width = $width / ($height / $thumb_height);
}
else
{
   // If the thumbnail is wider than the image
   $new_width = $thumb_width;
   $new_height = $height / ($width / $thumb_width);
}

$thumb = imagecreatetruecolor( $thumb_width, $thumb_height );

// Resize and crop
imagecopyresampled($thumb,
                   $image,
                   0 - ($new_width - $thumb_width) / 2, // Center the image horizontally
                   0 - ($new_height - $thumb_height) / 2, // Center the image vertically
                   0, 0,
                   $new_width, $new_height,
                   $width, $height);
imagejpeg($thumb, $filename, 80);

Haven't tested this but it should work.

EDIT

Now tested and working.

User · Answer

You can use imagecrop function in  PHP 5    5 5 0  PHP 7     Example    lt  php  im   imagecreatefrompng  example png     size   min imagesx  im   imagesy  im     im2   imagecrop  im    x    gt  0   y    gt  0   width    gt   size   height    gt   size    if   im2     FALSE        imagepng  im2   example-cropped png        imagedestroy  im2     imagedestroy  im     gt

User · Answer

HTML Code -  enter code here    lt  DOCTYPE html gt     lt html gt     lt body gt      lt form action  upload php  method  post  enctype  multipart form-data  gt    Select image to upload     lt input type  file  name  image  id  fileToUpload  gt     lt input type  submit  value  Upload Image  name  submit  gt    lt  form gt     lt  body gt    lt  html gt    upload php  enter code here  lt  php         image     FILES         NewImageName   rand 4 10000   -    image  image    name           destination   realpath     images testing              move uploaded file  image  image    tmp name     destination  NewImageName          image   imagecreatefromjpeg  destination  NewImageName          filename    destination  NewImageName          thumb width   200         thumb height   150          width   imagesx  image          height   imagesy  image           original aspect    width    height         thumb aspect    thumb width    thumb height         if    original aspect  gt    thumb aspect                       If image is wider than thumbnail  in aspect ratio sense            new height    thumb height            new width    width     height    thumb height                 else                     If the thumbnail is wider than the image           new width    thumb width            new height    height     width    thumb width                   thumb   imagecreatetruecolor   thumb width   thumb height              Resize and crop       imagecopyresampled  thumb                            image                           0 -   new width -  thumb width    2     Center the image horizontally                          0 -   new height -  thumb height    2     Center the image vertically                          0  0                            new width   new height                            width   height         imagejpeg  thumb   filename  80         echo  cropped   die          gt

User · Answer

php 5 5 has an imagecrop function http   php net manual en function imagecrop php

User · Answer

imagecopyresampled   will take a rectangular area from  src image of width  src w and height  src h at position   src x   src y  and place it in a rectangular area of  dst image of width  dst w and height  dst h at position   dst x   dst y    If the source and destination coordinates and width and heights differ  appropriate stretching or shrinking of the image fragment will be performed  The coordinates refer to the upper left corner   This function can be used to copy regions within the same image  But if the regions overlap  the results will be unpredictable   - Edit -  If  src w and  src h are smaller than  dst w and  dst h respectively  thumb image will be zoomed in  Otherwise it will be zoomed out    lt  php  dst x   0       X-coordinate of destination point  dst y   0       Y-coordinate of destination point  src x   100     Crop Start X position in original image  src y   100     Crop Srart Y position in original image  dst w   160     Thumb width  dst h   120     Thumb height  src w   260     Crop end X position in original image  src h   220     Crop end Y position in original image     Creating an image with true colors having thumb dimensions  to merge with the original image   dst image   imagecreatetruecolor  dst w   dst h      Get original image  src image   imagecreatefromjpeg  images source jpg       Cropping imagecopyresampled  dst image   src image   dst x   dst y   src x   src y   dst w   dst h   src w   src h      Saving imagejpeg  dst image   images crop jpg      gt

User · Answer

image   imagecreatefromjpeg   GET  src      filename    images cropped whatever jpg    Must be replaced with    image   imagecreatefromjpeg   GET  src       Then it will work

User · Answer

Improved Crop image functionality in PHP on the fly    http   www example com cropimage php filename a jpg amp newxsize 100 amp newysize 200 amp constrain 1   Code in cropimage php    basefilename    basename urldecode   REQUEST  filename        path    images     outPath    crop images     saveOutput   false     true false   true  if you want to save images in out put folder   defaultImage    no img png      change it with your default image   basefilename    basefilename   w     REQUEST  newxsize     h     REQUEST  newysize     if   basefilename               img    path    defaultImage       percent   100    else        img    path    basefilename        len   strlen  img        ext   substr  img   len - 3   len        img2   substr  img  0   len - 3    strtoupper  ext       if   file exists  img    img    img2      if  file exists  img              percent      GET  percent             constrain      GET  constrain             w    w           h    h        else if  file exists  path    basefilename              img    path    basefilename           percent     GET  percent             constrain     GET  constrain             w    w           h    h        else             img    path    no img png         change with your default image          percent      GET  percent             constrain      GET  constrain             w    w           h    h                get image size of img  x    getimagesize  img       image width  sw    x 0      image height  sh    x 1    if   percent  gt  0           calculate resized height and width if percent is defined      percent    percent   0 01       w    sw    percent       h    sh    percent    else       if  isset   w  AND  isset   h                autocompute height if only width is set          h    100     sw    w      01           h    round  sh    h         elseif  isset   h  AND  isset   w                autocompute width if only height is set          w    100     sh    h      01           w    round  sw    w         elseif  isset   h  AND isset   w  AND isset   constrain                get the smaller resulting image dimension if both height            and width are set and  constrain is also set          hx    100     sw    w      01           hx    round  sh    hx             wx    100     sh    h      01           wx    round  sw    wx            if   hx  lt   h                 h    100     sw    w      01               h    round  sh    h             else                w    100     sh    h      01               w    round  sw    w                       im    ImageCreateFromJPEG  img  or    Read JPEG Image  im    ImageCreateFromPNG  img  or    or PNG Image  im    ImageCreateFromGIF  img  or    or GIF Image  im   false     If image is not JPEG  PNG  or GIF  if    im           We get errors from PHP s ImageCreate functions           So let s echo back the contents of the actual image      readfile  img     else          Create the resized image destination      thumb    ImageCreateTrueColor  w   h          Copy from image source  resize it  and paste to image destination      ImageCopyResampled  thumb   im  0  0  0  0   w   h   sw   sh          Other format imagepng        if   saveOutput      Save image          save    outPath    basefilename           ImageJPEG  thumb   save         else      Output resized image         header  Content-type  image jpeg             ImageJPEG  thumb

User · Answer

image   imagecreatefromjpeg   GET  src       Needs to be replaced with this    image   imagecreatefromjpeg  images thumbnails myimage jpg      Because imagecreatefromjpeg   is expecting a string  This worked for me   ref  http   php net manual en function imagecreatefromjpeg php

[php] Crop image in PHP

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