preg_match returning mag_glass

function returnvalue($namearr,$exec){
    $result="";
    foreach($namearr as $arr => $value) {
        $regex = '<.* name="'. $value .'".*>';
        if (preg_match($regex,$exec,$result1) === false) {
            $result4=" FALSO OFFSET MORE HIGHER THAN SUBJECT " . "<br />";
        } else if (preg_match($regex,$exec,$result1) == 0) {
            $result4=" VOID" . "<br />";
        } else  {
            preg_match('/value="[\w]+"/i',$result1[0],$result2);
            $result3 = preg_replace('/value="/i',"",$result2[0]);
            $result4 = substr($result3,0,-1);
        }
        $result.= $value." : ".$result4 . "<br />";
    }
return $result;
}

Bad to read, but let's get down to business.

$ exec : <input name="fb_dtsg" value="AQHF4anP9ASw" autocomplete="off" type="hidden">

$ namearr receives: fb_dtsg

It turns out that here is something like: mag_glass , in fact, the expected return is: fb_dtsg actually only returns something totally different, in fact, what return does not exist no AQHF4anP9ASw .

I think it's a return of $exec , but I tried to find out more about mag_glass and found nothing.

Obs1: $ exec gets more stuff than what I've shown here, but for organization purposes I put only the part that matters.

Obs2: I did the test by hand with regexr, to see if it got to the correct value, and arrived, but in this function only for the name fb_dtsg the value is different ..