PHP to implement two tables merged into a new table and orderly arrangement of the method

The implementation methods are as follows:

code is as follows: <?php


/**


La (3,5,8,11)


lb (2,6,8,9,11,15)


merged into LC, arranged in order.


is implemented in PHP, and you can't use a function like sort!!!!


**/


Class Union {


var $lista = array ();


var $listb = array ();


var $listc = array ();


    


function Getlenght ($arr) {//Get table length


return count ($arr);


    }


    


function GetElement ($arr, $n) {//Get the nth element in the table, return


return $e = $arr [$n]? $arr [$n]: ';


    }


    


function Listinsert ($arr, $e) {//At the end of the table insert element


$arr [] = $e;


return $arr;


    }


}


$phpig = new Union ();


$lista = $phpig->lista = Array (3, 5, 8, 11);


$listb = $phpig->listb = Array (2, 6, 8, 9, 11, 15);


$LISTC = $phpig->listc;


$lena = $phpig->getlenght ($lista); Get Table Size


$lenb = $phpig->getlenght ($LISTB);


$i = $j = 0;


while ($i < $lena && $j < $lenb) {


$ea = $phpig->getelement ($lista, $i);


$eb = $phpig->getelement ($LISTB, $j);


if ($ea <= $eb) {


$LISTC = $phpig->listinsert ($LISTC, $ea);


+ + $i;


} else {


$LISTC = $phpig->listinsert ($LISTC, $eb);


+ + $j;


    }


}


while ($i < $lena) {


$ea = $phpig->getelement ($lista, $i);


$LISTC = $phpig->listinsert ($LISTC, $ea);


+ + $i;


}


while ($j < $lenb) {


$eb = $phpig->getelement ($LISTB, $j);


$LISTC = $phpig->listinsert ($LISTC, $eb);


+ + $j;


}


Print_r ($LISTC);


?>