php ensure file_get_contents images not corrput -

i have php script use file_get_contents download remote images server, sometime corrupted

$contents = file_get_contents($url); list($width,$height) = getimagesizefromstring( $contents );  if($width <= 300 ){     $contents = base64_decode('isdfafasfgoaaaansuheugaaaaeaaaabaqmaaaal21bkaaaaa1bmveuaaacnej3aaaaaaxrstlmaqobyzgaaaapjrefucndjyaaaaaiaaeihvdmaaaaasuvork5cyii=');     $downloadlog->log( "ignore file width below 300 : " . $url ); }  $aws->writetoaws( $target_path , $contents ); $contents = null;  

are there ways ensure images downloaded correctly without corruption or way validate images against remote url?

you can validate using getimagesize

note: formats may contain no image or may contain multiple images. in these cases, getimagesize() might not able determine image size. getimagesize() return 0 width , height in these cases.

on failure, false returned.

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edited:

for example

<?php $array = getimagesize('https://dl.dropboxusercontent.com/u/22492671/not_an_image.jpg'); if( $array ){     echo '<pre>';     print_r($array);     echo '</pre>'; } else {     echo 'image broken'; } ?> 

getimagesize() return false when image broken.