converts string to a numeric array , holding co-Ordinates in pure numeric form , without decimal and unncessary values ->it returns an ARRAY , NOT a STRING */ function PositionToNumeric($string) { $len=strlen($string); $x=0; $lat=[]; $idx=0; while($len>$x){ if($string[$x]!='.') $lat[$idx++]=$string[$x]; $x++; } return $lat; } /* [function dump_array($arr)] prints the array in normal form , unlike PHP arr_dump() that shows index + some extra useless values! [ARGUMENT] Array variable [FUNCTION] prints the array , NOTHING is RETURNED */ function dump_array($arr) { for($x=0;$x"; } /* [function validCoordinates()] A boolean value return function that takes 4 Co-Ordinates array [ARGUMENTS] --->latitudeA ---> latitude array of teacher --->longitudeA ---> longitude array of teacher --->latitudeB ---> longitude array of student --->longitudeB ---> longitude array of student [FUNCTION] if Co-ordinates of student and teacher are within bounds return true , else return false [SIZE] Each array is EXACTLY of size 9 units , that is index is from 0 --> 8 */ function validCoordinates() { } /* [line_break();] [FUNCTION] prints a new line */ function line_break() { echo "
"; } /* [getQR(string)] [FUNCTION] generates the corresponding QR of a given string [ARGUMENT] string is taken , as phpQRCODE library is used to generate the QR */ function getQR($string) { include('lib/qrlib.php'); QRcode::png($string); } /* [toStringArray] function to convert array to string [ARGUMENT] string is passed [RETURN VALUE] a string is returned */ function toStringfromArray($array) { $changed = implode("",$array); return $changed; } function isPresent() { } /* [hashed($latitudeString)] [FUNCTION] takes a string latitude in normal form , and return hasehd jumbled form [RETURN] returns a jumble string */ function hashed($latitudeString) { //include('functions.php'); $latitudeArray = PositionToNumeric($latitudeString); $permutation=array( array(0,0), array(1,8), array(2,4), array(3,5), array(4,6), array(5,7), array(6,1), array(7,2), array(8,3)); $jumbledLatitude; for($x=0;$x