noob needs help......

[loudog]

hey guy's, Im trying to compare two array's  to see it they have any common variables(i think that's what they are called) if they do have the function print out the common variable if they don't have the function print something saying they don't. Anyway, Im having trouble  comparing the actual  arrays  this is what i have so far.                 

                                                                                                                                                              thanks in advance.

<?php
function dz_compare($a,$b){
     $v=$a[$key];
     $v1=$b
     
     foreach($a as $key=>$value)
        foreach($b as $key =>$value)
         if($v1)
         
         
          
            
        
      
     }
}
$a=array(1=>"dog",2=>"cat",3=>"horse");
$b=array(1=>"horse",2=>"mouse",3=>"fish");

?>

[cunoodle2]

There is a function in php called array_diff().  It will compare two arrays and output the difference.

 

You can always search the manual here..

http://php.net/manual/en/function.array-diff.php

 

Here is a good example..

$a=array(1=>"dog",2=>"cat",3=>"horse");
$b=array(1=>"horse",2=>"mouse",3=>"fish");
$result = array_diff($a, $b);
print_r($result);

 

 

You can also use the intersect function to see which items appear in both arrays like this..

$a=array(1=>"dog",2=>"cat",3=>"horse");
$b=array(1=>"horse",2=>"mouse",3=>"fish");
$result = array_intersect($a, $b);
print_r($result);