PHP thumb creation and image merge

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);
}
?>