php resize image based on weight on page php - php

Question

I need to resize image based on weight on my page php.
Ex: I have image of 10MB, when I upload image I want to resize to 5MB.
It's possible?

Answer 1

<?php
header('Content-type: image/jpeg');
$filename = 'http://www.yoursite.com/images/cowboybebop27.JPG';
$image = imagecreatefromjpeg($filename);
$dest='temp_image.jpg';
imagejpeg($image, null, 10);
imagejpeg($image, $dest, 10);
?>
The above code will pull an image and save it at the file location of temp_image.jpg.
imagejpeg($image, null, 10); //This line displays the image with a quality of 10% which is roughly 1/10 the original file size as well.
imagejpeg($image, $dest, 10); //This line saves the image with an image quality of 10%.
see here

Answer 2

If you're OK with using a library, take a look at WideImage.
<?php
include "path/to/WideImage.php";
$image = 'path/to/image.jpg';
$wi_image = WideImage::load($image);
//Get the file size & dimensions of the image
$size = filesize($image);
$dimensions = getfilesize($image);
//Determine image size
if ($size > 10000000) {
//Image is over 10MB - half dimensions
$resized = $wi_image->resize(
$dimensions[0] / 2, //half of width
$dimensions[1] / 2 //half of height
);
//Save image
$resized->saveToFile('small.jpg');
}
?>
<img src="small.jpg" />
It's worth noting that this will not necessarily halve image size but in most cases it will make the size smaller.