Question

In my form there is an input to re-name the file. When they choose a file to upload it is checked to make sure it is only a .pdf file. I am trying to check the input to make sure they did not add a file extension to the new name. I am trying to check for any variation of ‘pdf’ Here is what I have but is there a better way to do this. Any help welcome, Thanks

  <?php
    function get_file_extension($pdf)
    {
     return substr(strrchr($pdf,'.'),0);
    }

    $pdf = "test.pdf";

    $test = strstr($pdf, '.');
    $pdf_ext = array('.pdf','.PDF','.Pdf','.PDf','.pdF','.pDf','.PdF','.PdF');
    $test =  get_file_extension($pdf);
    if($test == in_array($test,$pdf_ext)) {
       echo 'you do not a .pdf';
    } else {
       echo 'name ok';
    }
   ?>

Answer 1

Simply use strtolower or strtoupper:

if(strtolower($test) == 'pdf') {
   echo 'pdf';
} else {
   echo 'no pdf';
}

Or

if(strtoupper($test) == 'PDF') {
   echo 'pdf';
} else {
   echo 'no pdf';
}