how to resize the image while uploading using php

Question

Please help with the php code to upload an image. The image should be compressed while uploading without disturbing its resolution. Also, the image should be resized in 500 x 500 px. Any assistance will be appreciated. Thanks in advance

Answer 1

function resize_image($file, $width, $height) {
    list($w, $h) = getimagesize($file);
    /* calculate new image size with ratio */
    $ratio = max($width/$w, $height/$h);
    $h = ceil($height / $ratio);
    $x = ($w - $width / $ratio) / 2;
    $w = ceil($width / $ratio);
    /* read binary data from image file */
    $imgString = file_get_contents($file);
    /* create image from string */
    $image = imagecreatefromstring($imgString);
    $tmp = imagecreatetruecolor($width, $height);
    imagecopyresampled($tmp, $image,
    0, 0,
    $x, 0,
    $width, $height,
    $w, $h);
    imagejpeg($tmp, $file, 100);
    return $file;
    /* cleanup memory */
    imagedestroy($image);
    imagedestroy($tmp);
}

you can call the function like this :

resize_image($_FILE["fileToUpload"]["tmp_name"], 500, 500);

See more info here