Cropping images with Php

Question

I'm using Jquery plugin ImgAreaSelect with PHP 5.3.9 with GD 2.0.34.

Following some examples from the plugin, I added a form that gives X and Y values from where I start selecting the image till the end of the selection.

This is going OK, because I recieve the values correctly, but I cannot crop the image. Followed some examples/tutorials but always failed.

Here is my PHP code:

$x1 = $_POST['x1']; //this one gives me the point where start to crop
$x2 = $_POST['x2']; //the end of X axis
$y1 = $_POST['y1']; //same for Y1 and Y2
$y2 = $_POST['y2'];
$w = $x2 - $x1; //getting the width for the new image
$h = $y2 - $y1; //getting the height for the new image
$src_img = "path/image";
$format = end(explode(".", $src_img)); //taking the image format (jpg, png, gif)
$size = getimagesize($src_img);
switch($format) {
    case "jpg":
        $copy = imagecreatefromjpeg($src_img);
        $new = ImageCreateTrueColor($w, $h);
        imagecopyresampled($new, $copy, 0, 0, $x1, $y1, $w, $h, $size[0], $size[1]);
        header('Content-type: image/jpeg');
        imagejpeg($new);
    break;
}

I would like to know if there's something wrong (most probably).

Thanks for all and taking your time to help.

my bad, but no, is not that, i type it by hand and I made a mistake. — Ardilla, Jul 24 '13 at 10:37
ok..so does it give some error ? or it just resizes the image ? — Deepanshu Goyal, Jul 24 '13 at 10:44
@Deepanshu I just commented the header line, and it resizes the image, as you say. — Ardilla, Jul 24 '13 at 10:47
`$src_img = "path/image";` ... `$copy = imagecreatefromjpeg($img_src);`... src_img or img_src? — dognose, Jul 24 '13 at 10:52
my bad again, yes, its src_img. and yes, the path it's correct. — Ardilla, Jul 24 '13 at 10:54
someone told me to change the 0,0,$x1,$y1 to $x1,$y1,0,0, it cropped it, but the image went backwards, letting a blackbackground at the top and left. but the answer was deleted — Ardilla, Jul 24 '13 at 10:56
http://stackoverflow.com/questions/4970466/php-cropping-image-with-imagecopyresampled might help you — Deepanshu Goyal, Jul 24 '13 at 11:02
the only thing you need to check is the parameters value and order in imagecopyresampled() — Deepanshu Goyal, Jul 24 '13 at 11:13

dognose · Accepted Answer · 2013-07-24T11:15:16.953

2

imagecopyresampled($new, $copy, $x1, $y1, 0, 0, $w, $h, $size[0], $size[1]);

http://php.net/manual/en/function.imagecopyresampled.php

In other words, 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).

in other words, you need to change it to:

imagecopyresampled($new, $copy,0 ,0 ,$x1, $y1, $w, $h, $w, $h);

edited Jul 24 '13 at 11:15

answered Jul 24 '13 at 11:08

dognose

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thanks you too, the only thing is that $x and $y goes after the 0, 0 values, now is working perfectly. thanks! – Ardilla Jul 24 '13 at 11:13
@Ardilla: whoops, my bad :) – dognose Jul 24 '13 at 11:14

score 0 · Answer 2 · answered Jul 24 '13 at 11:14

Anyway you can try this code also

<?php
  $x1 = $_POST['x1']; //this one gives me the point where start to crop
  $x2 = $_POST['x2']; //the end of X axis
  $y1 = $_POST['y1']; //same for Y1 and Y2
  $y2 = $_POST['y2'];
  $w  = ( $x2 - $x1 ); //getting the width for the new image
  $h  = ( $y2 - $y1 ); //getting the height for the new image

  $src  = "path_to_file";
  $info = getimagesize( $src );

  switch( $info[2] ) {
    case IMAGETYPE_JPEG:
      $copy = imagecreatefromjpeg( $src );
      $new  = imagecreatetruecolor( $w, $h );
      imagecopyresampled( $new, $copy, 0, 0, $x1, $y1, $info[0], $info[1], $w, $h );
      header( 'Content-type: image/jpeg' );
      imagejpeg( $new );
    break;
    default:
    break;
  }
?>

score 0 · Answer 3 · answered Apr 19 '17 at 09:51

//resize and crop image by center
function resize_crop_image($max_width, $max_height, $source_file, $dst_dir, $quality = 80){
    $imgsize = getimagesize($source_file);
    $width = $imgsize[0];
    $height = $imgsize[1];
    $mime = $imgsize['mime'];

    switch($mime){
        case 'image/gif':
            $image_create = "imagecreatefromgif";
            $image = "imagegif";
            break;

        case 'image/png':
            $image_create = "imagecreatefrompng";
            $image = "imagepng";
            $quality = 7;
            break;

        case 'image/jpeg':
            $image_create = "imagecreatefromjpeg";
            $image = "imagejpeg";
            $quality = 80;
            break;

        default:
            return false;
            break;
    }

    $dst_img = imagecreatetruecolor($max_width, $max_height);
    $src_img = $image_create($source_file);

    $width_new = $height * $max_width / $max_height;
    $height_new = $width * $max_height / $max_width;
    //if the new width is greater than the actual width of the image, then the height is too large and the rest cut off, or vice versa
    if($width_new > $width){
        //cut point by height
        $h_point = (($height - $height_new) / 2);
        //copy image
        imagecopyresampled($dst_img, $src_img, 0, 0, 0, $h_point, $max_width, $max_height, $width, $height_new);
    }else{
        //cut point by width
        $w_point = (($width - $width_new) / 2);
        imagecopyresampled($dst_img, $src_img, 0, 0, $w_point, 0, $max_width, 
Resize and crop image from center with PHP


$max_height, $width_new, $height);
    }

    $image($dst_img, $dst_dir, $quality);

    if($dst_img)imagedestroy($dst_img);
    if($src_img)imagedestroy($src_img);
}
//usage example
resize_crop_image(100, 100, "test.jpg", "test.jpg");

score -1 · Answer 4 · answered Jul 24 '13 at 11:11

-1

thanks to all, @Deepanshu gave me a link wich I saw a piece of code, but somehow strange: bool imagecopyresampled ( resource $dst_image , resource $src_image , int $dst_x , int $dst_y , int $src_x , int $src_y , int $dst_w , int $dst_h , int $src_w , int $src_h )

the last $src_w and $src_h I had to put the new width and the new height, instead the width and height of the original image.

so, the final code working properly is:

imagecopyresampled($new, $copy, 0, 0, $x1, $y1, $w, $h, $w, $h);

answered Jul 24 '13 at 11:11

Ardilla

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There is no need to post thanks like this, in fact please don't unless you are providing an answer to your own question. This doesn't seem to be an answer, so it should be a comment. On SO we thank each other by voting up and accepting answers. – vascowhite Jan 31 '14 at 18:16

Cropping images with Php

4 Answers4