PHP thumb creation and image merge

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PHP thumb uses the GD library to create thumbnails from images (jpeg, gif, png etc) on run time.

You can configure the output size and source will be entire image or a portion of original image.

PHP uses imagejpeg function which output image to browser or file.

Syntax:

bool imagejpeg ( resource $image [, string $filename [, int $quality ]] )

Return Values:

Returns TRUE on success and FALSE on failure.

Below are the two functions for thumbnail creation and merging two images.

Thumb creation:

<?php
function createThumbs( $pathToImages, $pathToThumbs, $thumbHeight, $fname )
{
$info = pathinfo($pathToImages . $fname);

if ( strtolower($info['extension']) == 'jpg' )
$img = imagecreatefromjpeg( "{$pathToImages}" );
if ( strtolower($info['extension']) == 'gif' )
$img = imagecreatefromgif( "{$pathToImages}" );
if ( strtolower($info['extension']) == 'png' )
$img = imagecreatefrompng( "{$pathToImages}" );

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

$new_height = $thumbHeight;
$new_width = floor( $width * ( $new_height / $height ) );

$tmp_img = imagecreatetruecolor( $new_width, $new_height );

imagecopyresized( $tmp_img, $img, 0, 0, 0, 0, $new_width, $new_height, $width, $height );

if ( strtolower($info['extension']) == 'jpg' )
imagejpeg( $tmp_img, "{$pathToThumbs}{$fname}" );
if ( strtolower($info['extension']) == 'gif' )
imagegif( $tmp_img, "{$pathToThumbs}{$fname}" );
if ( strtolower($info['extension']) == 'png' )
imagepng( $tmp_img, "{$pathToThumbs}{$fname}" );
}
?>

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Image merging:

<?php
function imagemerge($image1,$image2,$sizeW,$sizeH,$targetfile)
{
$image="images/white.jpg";
list($width1, $height1) = getimagesize($image1);
list($width2, $height2) = getimagesize($image2);

$aW1 = $width1;
$aH1 = $height1;

$aW2 = $width2;
$aH2 = $height2;

$info1 = pathinfo($image1);
$info2 = pathinfo($image2);

if ( strtolower($info1['extension']) == 'jpg' )
$photo = imagecreatefromjpeg($image1);
if ( strtolower($info1['extension']) == 'gif' )
$photo = imagecreatefromgif($image1);
if ( strtolower($info1['extension']) == 'png' )
$photo = imagecreatefrompng($image1);

if ( strtolower($info2['extension']) == 'jpg' )
$photo2 = imagecreatefromjpeg($image2);
if ( strtolower($info2['extension']) == 'gif' )
$photo2 = imagecreatefromgif($image2);
if ( strtolower($info2['extension']) == 'png' )
$photo2 = imagecreatefrompng($image2);

$photoFrame = imagecreatefromjpeg($image);
$fx1=($sizeW-$aW1)/2;
$fy1=($sizeH-$aH1)/2;

$fx2=$sizeW+($sizeW-$aW2)/2;
$fy2=($sizeH-$aH2)/2;

imagecopyresampled($photoFrame, $photo, $fx1, $fy1, 0, 0, $aW1, $aH1, $aW1, $aH1);
imagecopyresampled($photoFrame, $photo2, $fx2, $fy2, 0, 0, $aW2, $aH2, $aW2, $aH2);
imagejpeg($photoFrame, $targetfile);
}
?>

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4 thoughts on “PHP thumb creation and image merge”

    1. Hi Riyaz,
      You need to call the function “imagemerge” with all parameters.
      Create a folder “images” in the same path and put an image called “white.jpg” just like “images/white.jpg”.
      Then call the function:
      imagemerge(‘sample-1.jpg’,’sample-2.jpg’,400,400,’final.jpg’);
      You need to adjust the height and width as per white image.
      Thanks.

    1. You need to put all there images in your file path.
      1) first image. 2) second image and 3) a simple white.jpg in images folder.
      Then call the function as below:
      imagemerge(‘sample-1.jpg’,’sample-2.jpg’,400,400,’final.jpg’);
      Thanks.

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