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<?php
/*
* Gets the jpeg contents of the resized version of an already uploaded image
* (Returns false if the uploaded file was not an image)
*
* @param string $input_name The name of the file input field on the submission form
* @param string $prefix The text to prefix to the existing filename
* @param int $maxwidth The maximum width of the resized image
* @param int $maxheight The maximum height of the resized image
* @param true|false $square If set to true, will take the smallest of maxwidth and maxheight and use it to set the dimensions on all size; the image will be cropped.
* @return false|mixed The contents of the resized image, or false on failure
*/
function tp_resize($input_name, $prefix, $maxwidth, $maxheight, $square = false, $x1 = 0, $y1 = 0, $x2 = 0, $y2 = 0) {
$params = array(
"input_name"=>$input_name,
"output_name"=>$output_name,
"maxwidth"=>$maxwidth,
"maxheight"=>$maxheight,
"square"=>$square,
"x1"=>$x1,
"y1"=>$y1,
"x2"=>$x2,
"y2"=>$y2);
$path = pathinfo($input_name);
$output_name = $path["dirname"] . "/$prefix" . $path["filename"] . "." . $path["extension"];
// Get the size information from the image
if ($imgsizearray = getimagesize($input_name)) {
// Get width and height
$width = $imgsizearray[0];
$height = $imgsizearray[1];
$newwidth = $width;
$newheight = $height;
// Square the image dimensions if we're wanting a square image
if ($square) {
if ($width < $height) {
$height = $width;
} else {
$width = $height;
}
$newwidth = $width;
$newheight = $height;
}
if ($width > $maxwidth) {
$newheight = floor($height * ($maxwidth / $width));
$newwidth = $maxwidth;
}
if ($newheight > $maxheight) {
$newwidth = floor($newwidth * ($maxheight / $newheight));
$newheight = $maxheight;
}
$accepted_formats = array(
'image/jpeg' => 'jpeg',
'image/png' => 'png',
'image/gif' => 'gif'
);
// If it's a file we can manipulate ...
if (array_key_exists($imgsizearray['mime'],$accepted_formats)) {
// Crop the image if we need a square
if ($square) {
if ($x1 == 0 && $y1 == 0 && $x2 == 0 && $y2 ==0) {
$widthoffset = floor(($imgsizearray[0] - $width) / 2);
$heightoffset = floor(($imgsizearray[1] - $height) / 2);
} else {
$widthoffset = $x1;
$heightoffset = $y1;
$width = ($x2 - $x1);
$height = $width;
}
} else {
if ($x1 == 0 && $y1 == 0 && $x2 == 0 && $y2 ==0) {
$widthoffset = 0;
$heightoffset = 0;
} else {
$widthoffset = $x1;
$heightoffset = $y1;
$width = ($x2 - $x1);
$height = ($y2 - $y1);
}
}
// Resize and return the image contents!
if ($square) {
$newheight = $maxheight;
$newwidth = $maxwidth;
}
$command = "convert $input_name -resize ".$newwidth."x".$newheight."^ -gravity center -extent ".$newwidth."x".$newheight." $output_name";
system($command);
return $output_name;
}
}
return false;
}
?>
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