파일업로드시 확장자 체크
$valid_extensions = array('jpg', 'gif', 'png');
$file_name = basename($_FILES['userfile']['name']);
$_file_name = explode('.', $file_name);
$ext = $_file_name[ count($_file_name) - 1 ];
if( !in_array($ext, $valid_extensions) ) {
/* This file is invalid */
}
$file_name = basename($_FILES['userfile']['name']);
$_file_name = explode('.', $file_name);
$ext = $_file_name[ count($_file_name) - 1 ];
if( !in_array($ext, $valid_extensions) ) {
/* This file is invalid */
}
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