PHP Snippets
image_borders
Information
(PHP Version >= 4.1.6)Functions used in this snippet: is_array, strtolower, substr, strrpos, imagesx, imagesy, imagecreate, imagecopy, min.
Description
int image_borders( int img, array borders )
Adds borders to the image img. The borders array should have the indexes tl, tt, tr, rr, br, bb, bl, ll correspoding to that area's border. (see the example below for a better explanation)
Note: This function is fairly slow, so it would be best to apply it once, then save it for future showings.
Also, the wider the top(tt) and bottom(bb) and the longer the left(ll) and right(rr) borders are the faster the function will perform. They CAN be longer and wider than the actual image itself.
Snippet
<?php
function image_borders($img, $borders){
if(!is_array($borders)){
return $img;
}
$border_data = array();
$types = array('jpeg'=>'imagecreatefromjpeg', 'jpg'=>'imagecreatefromjpeg', 'gif'=>'imagecreatefromgif', 'png'=>'imagecreatefrompng');
foreach($borders as $key=>$value){
$border_data[$key]['img'] = $types[strtolower(substr($value, strrpos($value, '.') + 1))]($value);
$border_data[$key]['x'] = imagesx($border_data[$key]['img']);
$border_data[$key]['y'] = imagesy($border_data[$key]['img']);
}
$x = imagesx($img);
$y = imagesy($img);
$dest = imagecreate(($x + $border_data['ll']['x'] + $border_data['rr']['x']), ($y + $border_data['tt']['y'] + $border_data['bb']['y']));
$max_x = $x + $border_data['ll']['x'];
$actual_x = $border_data['ll']['x'];
$ttx = $border_data['ll']['x'];
$bbx = $border_data['ll']['x'];
while($actual_x < $max_x){
if($ttx < $max_x){
imagecopy($dest, $border_data['tt']['img'], $ttx, 0, 0, 0, $border_data['tt']['x'], $border_data['tt']['y']);
$ttx += $border_data['tt']['x'];
}
if($bbx < $max_x){
imagecopy($dest, $border_data['bb']['img'], $bbx, ($border_data['ll']['y'] + $y), 0, 0, $border_data['bb']['x'], $border_data['bb']['y']);
$bbx += $border_data['bb']['x'];
}
$actual_x = min($ttx, $bbx);
}
$max_y = $y + $border_data['tt']['y'];
$actual_y = $border_data['tt']['y'];
$lly = $border_data['tt']['y'];
$rry = $border_data['rr']['y'];
while($actual_y < $max_y){
if($lly < $max_y){
imagecopy($dest, $border_data['ll']['img'], 0, $lly, 0, 0, $border_data['ll']['x'], $border_data['ll']['y']);
$lly += $border_data['ll']['y'];
}
if($rry < $max_y){
imagecopy($dest, $border_data['rr']['img'], ($border_data['ll']['x'] + $x), $rry, 0,0, $border_data['rr']['x'], $border_data['rr']['y']);
$rry += $border_data['rr']['y'];
}
$actual_y = min($lly, $rry);
}
imagecopy($dest, $border_data['tl']['img'], 0, 0, 0, 0, $border_data['tl']['x'], $border_data['tl']['y']);
imagecopy($dest, $border_data['tr']['img'], ($x + $border_data['tl']['x']), 0, 0, 0, $border_data['tr']['x'], $border_data['tr']['y']);
imagecopy($dest, $border_data['bl']['img'], 0, ($y + $border_data['tl']['y']), 0, 0, $border_data['bl']['x'], $border_data['bl']['y']);
imagecopy($dest, $border_data['br']['img'], ($x + $border_data['tl']['x']), ($y + $border_data['tl']['y']), 0, 0, $border_data['br']['x'], $border_data['br']['y']);
imagecopy($dest, $img, $border_data['ll']['x'], $border_data['tt']['y'], 0, 0, $x, $y);
return $dest;
}
?>
Example
image_borders Can be used in the following way:
<?php
$img = imagecreatefromjpeg('baseimage.jpg');
// create the base image
$borders = array( 'tl'=>'topleft.jpg',
'tt'=>'top.jpg',
'tr'=>'topright.jpg',
'rr'=>'right.jpg',
'br'=>'bottomright.jpg',
'bb'=>'bottom.jpg',
'bl'=>'bottomleft.jpg',
'll'=>'left.jpg');
// create your array with borders
// Note, the array indexes must be the same as above
$dest = image_borders($img, $borders);
// actually make the image
header('Content-type: image/png');
// send a header
imagepng($dest);
// send it to the browser
?>
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