file exist php

PHP
if (!file_exists('http://mysite.com/images/thumbnail_1286954822.jpg')) {   
$filefound = '0';                         
}file_exists ( string $filename ) : boolif (file_exists($filePath)) {
  // todo acction
}<?php
$filename = '/path/to/foo.txt';

if (file_exists($filename)) {
    echo "The file $filename exists";
} else {
    echo "The file $filename does not exist";
}
?>
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