PHP - Moved: Allow Only One Hyphen With A Literal String

I have a bunch of PDF's, some of them having Uppercase first letters and some having lowercase first letters. Right now my code is alphabetizing all of the Uppercase first letters first then all of the lowercase. I want them to be mixed.

$dir = "../../forms/pdf/";
foreach(glob($dir.'*.pdf') as $pdf){
    $files[] = str_replace($dir, '', $pdf);
}

then:
<select name="current_pdf" id="current_pdf">
            <option value="">Please Select a PDF to replace</option>
            <?php
            foreach($files as $file) {
                echo "<option value=\"$file\">" . $file . "</option>";
            }
            ?>
            </select>

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SQLITE has syntax like

' WHERE MATCH ( 'colname : "one two" )' 
 //My pdo sql query 
$sql .= MATCH 'colname : "?" )'; $pdo->bindValue(1,$text);`

But Pdo placeholders can't have quotes around them. So this does not work. I tried a million variations of the placeholder syntax "?" "" ? "" """ ? """ \" ? \" . But nothing works.

Errors I get : General error: 1 near "?" | 25 column index out of range . Also for this query : MATCH  ( names: ? AND categoryids: ? ) , the error is: `General error: 1 unrecognized token: ":"`

Would really love some help here.. Thanks

Edited March 29, 2019 by requinix
removing bad styling

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