[SUCTF 2018]GetShell
[SUCTF 2018]GetShell
考点
wp
if($contents=file_get_contents($_FILES["file"]["tmp_name"])){
$data=substr($contents,5);
foreach ($black_char as $b) {
if (stripos($data, $b) !== false){
die("illegal char");
}
}
} 


小结
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