resize any image using php

$im_link='your img path';

$filename=str_replace(" ", "%20",$im_link);
$max_width=630; /* set your div frame width */
$max_height=1000; /* set your div frame height*/

$data = getimagesize($filename);
$_orig_width = $data[0];
$_orig_height = $data[1];

if($_orig_width>$max_width)
{
$new_big_img_width_per=($max_width*100)/$_orig_width;
$new_big_img_height=($_orig_height*$new_big_img_width_per)/100;

$final_height=round($new_big_img_height,0);
$final_width=$max_width;
}
else
{
$final_height=$final_width='auto';
}


echo '<img src="'.$im_link.'" height="'.$final_height.'" width="'.$final_width'" />


.........................................enjoy................................................