initial commit

yash/html/functions.php

@@ -0,0 +1,259 @@
+<?php
+
+/*
+[function PositionToNumeric($string)]
+
+Function to convert string to numeric array
+
+[ARGUMENT]
+function takes string as argument 
+
+[FUNCTION]
+->converts string to a numeric array , holding co-Ordinates in pure numeric form , without decimal and unncessary values
+->it returns an ARRAY , NOT a STRING
+
+*/
+
+function PositionToNumeric($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;$x<count($arr);$x++)
+   echo $arr[$x];
+   
+   echo "<br>";
+
+}
+
+
+
+/*
+
+[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 "<br>";
+
+}
+
+
+/*
+[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;$x<count($permutation);$x++)
+$jumbledLatitude[$permutation[$x][0]]=$latitudeArray[$permutation[$x][1]];
+
+$hashedLatitude = toStringfromArray($jumbledLatitude);
+
+return $hashedLatitude;
+
+
+}
+
+
+
+
+/*
+[deCrypt($latitudeString)]
+
+[FUNCTION]
+takes a hashed $latitudeString , deCrypt it to original form 
+
+[RETURN]
+return a decrypted Array of latitude
+
+*/
+
+function deCrypt($latitudeString)
+{
+
+$latitudeArray = PositionToNumeric($latitudeString);
+
+$permutation=array(
+array(0,0),
+array(1,8),
+array(2,4),
+array(3,5),
+array(4,6),
+array(5,7),
+array(6,1),
+array(7,2),
+array(8,3));
+
+
+
+$unjumbledLatitude;
+
+
+
+for($x=0;$x<count($permutation);$x++)
+$unjumbledLatitude[$permutation[$x][1]]=$latitudeArray[$permutation[$x][0]];
+
+
+return $unjumbledLatitude;
+
+}
+
+
+/*
+
+
+*/
+
+
+
+
+
+
+
+
+
+
+
+
+?>