Resize image with ratio using PHP - php

Question

Say I've got some square images which I want to resize to rectangle images with the ratio 16:9. What is the best way to do it using PHP?

Answer 1

you could use imagecopyresampled ( resource $dst_image , resource $src_image , int $dst_x , int $dst_y , int $src_x , int $src_y , int $dst_w , int $dst_h , int $src_w , int $src_h )
more at http://us2.php.net/imagecopyresampled

Answer 2

Try this... Not Using GD but i think it will work for u.
<?php
function Image($image, $crop = null, $size = null) {
$image = ImageCreateFromString(file_get_contents($image));
if (is_resource($image) === true) {
$x = 0;
$y = 0;
$width = imagesx($image);
$height = imagesy($image);
/*
CROP (Aspect Ratio) Section
*/
if (is_null($crop) === true) {
$crop = array($width, $height);
} else {
$crop = array_filter(explode(':', $crop));
if (empty($crop) === true) {
$crop = array($width, $height);
} else {
if ((empty($crop[0]) === true) || (is_numeric($crop[0]) === false)) {
$crop[0] = $crop[1];
} else if ((empty($crop[1]) === true) || (is_numeric($crop[1]) === false)) {
$crop[1] = $crop[0];
}
}
$ratio = array(0 => $width / $height, 1 => $crop[0] / $crop[1]);
if ($ratio[0] > $ratio[1]) {
$width = $height * $ratio[1];
$x = (imagesx($image) - $width) / 2;
}
else if ($ratio[0] < $ratio[1]) {
$height = $width / $ratio[1];
$y = (imagesy($image) - $height) / 2;
}
}
/*
Resize Section
*/
if (is_null($size) === true) {
$size = array($width, $height);
}
else {
$size = array_filter(explode('x', $size));
if (empty($size) === true) {
$size = array(imagesx($image), imagesy($image));
} else {
if ((empty($size[0]) === true) || (is_numeric($size[0]) === false)) {
$size[0] = round($size[1] * $width / $height);
} else if ((empty($size[1]) === true) || (is_numeric($size[1]) === false)) {
$size[1] = round($size[0] * $height / $width);
}
}
}
$result = ImageCreateTrueColor($size[0], $size[1]);
if (is_resource($result) === true) {
ImageSaveAlpha($result, true);
ImageAlphaBlending($result, true);
ImageFill($result, 0, 0, ImageColorAllocate($result, 255, 255, 255));
ImageCopyResampled($result, $image, 0, 0, $x, $y, $size[0], $size[1], $width, $height);
ImageInterlace($result, true);
ImageJPEG($result, null, 90);
}
}
return false;
}
header('Content-Type: image/jpeg');
Image('image.jpg', '2:1', '1200x');
?>