PHP compare array

Question

Is there anyway to compare arrays in php using an inbuilt function, short of doing some sort of loop?

$a1 = array(1,2,3);
$a2 = array(1,2,3);

if (array_are_         


        

Answer 1

If you do not care about keys and that just the values then this is the best method to compare values and make sure the duplicates are counted.

$mag = '{"1":"1","2":"2","3":"3","4":"3"}';
$mag_evo = '1|2|3';

$test1 = array_values(json_decode($mag, true));
$test2 = array_values(explode('|', $mag_evo));

if($test1 == $test2) {
    echo 'true';
}

This will not echo true as $mag has 2 values in the array that equal 3.

This works best if you only care about the values and keys and you do not care about duplication. $mag = '{"1":"1","2":"2","3":"3","4":"3"}'; $mag_evo = '1|2|3';

$test1 = json_decode($mag, true);
$test2 = explode('|', $mag_evo);

// There is no difference in either array.  
if(!array_diff($test1, $test2) && !array_diff($test2, $test1)) { 
    echo 'true';
}

This will return true as all values are found in both arrays, but as noted before it does not care about duplication.