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//Enter you code here.
//Please indent properly.
 
<?php
//program to find the common elements of the two array
//here we have to array A and B from which w have to find the common element
//first we sort then using merge sort and after then for traversing through
//the array in one iteration we can find the comman elements the given array
//this is an inspace algorithm meansno extra space is needed
 
//best case time complexity=O(nlogn)
//O(nlogn)-> for sorting
//O(n)-> for while loop to find comman element
 
//average case time complexity=O(nlogn)
//O(nlogn)-> for sorting
//O(n)-> for while loop to find comman element
 
//worst case time complexity =O(nlogn)
//O(nlogn)-> for sorting
//O(n)-> for while loop to find comman element
 
 
 
$commonArray=array();
$A=array(3,4,5,6,7,8,9,10,36,58,27,48);
$B=array(3,10,4,5,6,8,12,24,37,27,50);
sort($A);
sort($B);
$size1=sizeof($A);
$size2=sizeof($B);
$counter1=0;
$counter2=0;
while(($counter1< $size1) && ($counter2)<($size2))//traversing through the array
{
 
if ($A[$counter1] == $B[$counter2])
{
      array_push($commonArray,$A[$counter1]);  //to enter comman element in the output array 
      $counter1=$counter1+1;
      $counter2=$counter2+1;
}
    else if ($A[$counter1] < $B[$counter2])
{
     $counter1=$counter1+1; }
 
    else
{
     $counter2=$counter2+1;
}
}
 
print_r($commonArray);//to print the output array
?>
 
 

Main.java:4: error: class, interface, or enum expected
<?php
^
Main.java:26: error: class, interface, or enum expected
$A=array(3,4,5,6,7,8,9,10,36,58,27,48);
^
Main.java:27: error: class, interface, or enum expected
$B=array(3,10,4,5,6,8,12,24,37,27,50);
^
Main.java:28: error: class, interface, or enum expected
sort($A);
^
Main.java:29: error: class, interface, or enum expected
sort($B);
^
Main.java:30: error: class, interface, or enum expected
$size1=sizeof($A);
^
Main.java:31: error: class, interface, or enum expected
$size2=sizeof($B);
^
Main.java:32: error: class, interface, or enum expected
$counter1=0;
^
Main.java:33: error: class, interface, or enum expected
$counter2=0;
^
Main.java:34: error: class, interface, or enum expected
while(($counter1< $size1) && ($counter2)<($size2))//traversing through the array
^
Main.java:40: error: class, interface, or enum expected
      $counter1=$counter1+1;
      ^
Main.java:41: error: class, interface, or enum expected
      $counter2=$counter2+1;
      ^
Main.java:42: error: class, interface, or enum expected
}
^
Main.java:45: error: class, interface, or enum expected
     $counter1=$counter1+1; }
                            ^
Main.java:50: error: class, interface, or enum expected
}
^
Main.java:54: error: class, interface, or enum expected
?>
^
16 errors

Standard output is empty