ディレクトリトラバーサル 03 - yujitounai/helloworld GitHub Wiki

<div class="box">
<form method="get" action="">src
<input name="src" type="text">
<input type="submit">
</form>
</div>
<?php
$src = filter_input(INPUT_GET,"src");
if($src){
    $content = file_get_contents($src);
    $rows = explode("\n", $content);
    echo $rows[0];//1 line only
}
?>