note 102497 deleted from function.imagefilter by danbrown

Note Submitter: killing_wombles0000 at hotmail dot com 

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Anyone wanting to create a reflecion of an image. Simple process that copies, line by line, from the bottom of the image, a given number of pixels. Each line gets gradually more transparent. Outputs PNG to screen.

This is pretty hot-coded - all four input variables (input image, reflection height, starting transparency, gap between image and reflection) are set manually here.

<?php
	$in = imagecreatefromjpeg('C:\test.jpg');
	$reflection_strength = 120;		//	starting transparency (0-127, 0 being opaque)
	$reflection_height = 40;		// 	height of reflection in pixels
	$gap = 10;						//	gap between image and reflection
	
	$orig_height = imagesy($in);								//	store height of original image
	$orig_width = imagesx($in);									//	store height of original image
	$output_height = $orig_height + $reflection_height + $gap;	//	calculate height of output image
	
	// create new image to use for output. fill with transparency. ALPHA BLENDING MUST BE FALSE
	$out = imagecreatetruecolor($orig_width, $output_height);
	imagealphablending($out, false);
	$bg = imagecolortransparent($out, imagecolorallocatealpha($out, 255, 255, 255, 127));
	imagefill($out, 0, 0, $bg);
	imagefilledrectangle($out, 0, 0, imagesx($in), imagesy($in), $bg1);
	
	// copy original image onto new one, leaving space underneath for reflection and 'gap'
	imagecopyresampled ( $out , $in , 0, 0, 0, 0, imagesx($in), imagesy($in), imagesx($in), imagesy($in));

 	// create new single-line image to act as buffer while applying transparency
	$reflection_section = imagecreatetruecolor(imagesx($in), 1);
	imagealphablending($reflection_section, false);
	$bg1 = imagecolortransparent($reflection_section, imagecolorallocatealpha($reflection_section, 255, 255, 255, 127));
	imagefill($reflection_section, 0, 0, $bg1);

	// 1. copy each line individually, starting at the 'bottom' of the image, working upwards. 
	// 2. set transparency to vary between reflection_strength and 127
	// 3. copy line back to mirrored position in original
	for ($y = 0; $y<$reflection_height;$y++)
	{	
		$t = ((127-$reflection_strength) + ($reflection_strength*($y/$reflection_height)));
		imagecopy($reflection_section, $out, 0, 0, 0, imagesy($in)  - $y, imagesx($in), 1);
		imagefilter($reflection_section, IMG_FILTER_COLORIZE, 0, 0, 0, $t);
		imagecopyresized($out, $reflection_section, $a, imagesy($in) + $y + $gap, 0, 0, imagesx($in) - (2*$a), 1, imagesx($in), 1);
	}
	
	// output image to view
	header('Content-type: image/png');
	imagesavealpha($out,true);
	imagepng($out);
?>