PHP 7.0.6 Released

    Image Processing (ImageMagick)

    User Contributed Notes

    mlong-php at mlong dot us
    8 years ago
    Here is an example on how to take an image that is already in a string (say, from a database), and resize it, add a border, and print it out. I use this for showing reseller logos

      // Decode image from base64
      $image=base64_decode($imagedata);

      // Create Imagick object
      $im = new Imagick();

      // Convert image into Imagick
      $im->readimageblob($image);

      // Create thumbnail max of 200x82
      $im->thumbnailImage(200,82,true);

      // Add a subtle border
      $color=new ImagickPixel();
      $color->setColor("rgb(220,220,220)");
      $im->borderImage($color,1,1);

      // Output the image
      $output = $im->getimageblob();
      $outputtype = $im->getFormat();

      header("Content-type: $outputtype");
      echo $output;
    Eero Niemi (eero at eero dot info)
    8 years ago
    To load image (usually vector image, like PDF) with larger resolution than image's default is, you have to set resolution before reading the file, like this:

    <?php
    $im     = new Imagick();
    $im->setResolution( 300, 300 );
    $im->readImage( "test.pdf" );
    ?>
    carlosvanhalen7 at gmail dot com
    3 years ago
    Here's a handy function that finds the first occurrence of a specific pixel. You can set the tolerance of the color you are looking for, or set it to 0 if want an exact match

    <?php

    function findPixel($img, $r, $g, $b, $tolerance=5)
    {
            $original_                 = new Imagick($img);
            $height                    = 0;
            $width                    = 0;
        list(    $width, $height)    = getimagesize($img);
            $matrix_org                = array();
            $matrix_mrk                = array();

        for(     $x = 0 ; $x < $width ; $x++){
                $matrix_org[$x]            = array();
                $matrix_mrk[$x]            = array();
        }

        for(     $x = 0 ; $x < $width ; $x++ )
        {
            for(     $y = 0 ; $y < $height ; $y++ ){
                    $matrix_org[$x][$y]                = $original_->getImagePixelColor($x, $y)->getColorAsString();
                    $colors                         = preg_replace('/[^-,0-9+$]/', '', $matrix_org[$x][$y]);
                    $colors                            = explode(',', $colors);
                    $r_org                            = $colors[0];
                    $g_org                            = $colors[1];
                    $b_org                            = $colors[2];
               
                if(     (     $r <= ($r_org+$tolerance) && $r >= ($r_org - $tolerance) )
                    &&  (     $g <= ($g_org+$tolerance) && $g >= ($g_org - $tolerance) )
                    &&  (     $b <= ($b_org+$tolerance) && $b >= ($b_org - $tolerance) ) )
                {
                    return array(     $x, $y );
                }
            }
        }

        return     false;
    }

    ?>
    aem at teletype dot ru
    4 years ago
    To configure and build imagick extension with phpize, you must first install libmagickwand-dev and libmagickcore-dev.

    For example, "sudo apt-get install libmagickwand-dev libmagickcore-dev" and then phpize and ./configure.
    mlong-php at mlong dot us
    8 years ago
    The fit functionality of thumbnailImage doesn't work as one would anticipate. Instead, use this to make a thumbnail that has max of 200x82:

      // Create thumbnail max of 200x82
      $width=$im->getImageWidth();
      if ($width > 200) { $im->thumbnailImage(200,null,0); }

      $height=$im->getImageHeight();
      if ($height > 82) { $im->thumbnailImage(null,82,0); }
    gmail dot com at james dot ellis
    8 years ago
    In case anyone is wondering about some examples for Imagick usage, take a look at Mikko Koppanen's blog at http://valokuva.org/?cat=1.
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