PHP array key exists

Question

I have 2 arrrays, And i need return TRUE or FALSE when 2 arrays matched each other. also un-ordered arrays should return TRUE if results matched, but only should return true if both arrays have same values.

//This should return TRUE
$array_One = array('test1', 'test2', 'test3');
$array_Two = array('test1', 'test2', 'test3');

//This should return TRUE
$array_One = array('test1', 'test2', 'test3');
$array_Two = array('test1', 'test3', 'test2');

//This should return TRUE
$array_One = array('test1', 'test2', 'test3');
$array_Two = array('test1', 'test3', 'test2');

//This should return FALSE
$array_One = array('test1', 'test2', 'test3');
$array_Two = array('test1', 'test2');

I tried few methods, including array_key_exists by using foreach, But it does not returned the expected result. This should return ONLY one TRUE or FALSE when arrays matched.

The second codeblock, the array values, doesn't match, but you say it should be returning true, is what you want just comparing the sizes of the arrays? — Kao
– Kao, Commented Dec 10, 2012 at 13:34
Agreed with JamWaffles. Do an array_diff and see if the resulting array is empty or not. — Phil H.
– Phil H., Commented Dec 10, 2012 at 13:34
@JamWaffles : array_diff return the difference of arrays, So how can I return just only a one TRUE or false ? — Minuwan Deshapriya
– Minuwan Deshapriya, Commented Dec 10, 2012 at 13:36

Haim Evgi · Accepted Answer · 2012-12-10 13:37:04Z

3

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

If you just need to know if two arrays' values are exactly the same (regardless of keys and order), then instead of using array_diff, this is a simple method:

<?php

function identical_values( $arrayA , $arrayB ) {

    sort( $arrayA );
    sort( $arrayB );

    return $arrayA == $arrayB;
}

// Examples:

$array1 = array( "red" , "green" , "blue" );
$array2 = array( "green" , "red" , "blue" );
$array3 = array( "red" , "green" , "blue" , "yellow" );
$array4 = array( "red" , "yellow" , "blue" );
$array5 = array( "x" => "red" , "y" =>  "green" , "z" => "blue" );

identical_values( $array1 , $array2 );  // true
identical_values( $array1 , $array3 );  // false
identical_values( $array1 , $array4 );  // false
identical_values( $array1 , $array5 );  // true

?>

answered Dec 10, 2012 at 13:37

Haim Evgi

126k46 gold badges222 silver badges226 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Dale · Accepted Answer · 2012-12-10 13:42:13Z

1

$array_One = array('test1', 'test2', 'test3');
$array_Two = array('test1', 'test3', 'test2');

if (array_diff($array_One, $array_Two))
{
    // there is a difference
    echo 'FALSE';
}
else
{
    // the arrays match
    echo 'TRUE';
}

answered Dec 10, 2012 at 13:42

Dale

10.5k23 silver badges34 bronze badges

Comments

Kao · Accepted Answer · 2012-12-10 13:42:38Z

1

If you want to compare the sizes of the arrays, what you can do is use count:

if ( count ( $array1 ) == count ( $array2 )) 
{ 
     MATCH! 
} 
else 
{ 
     NO MATCH! 
}

edited Dec 10, 2012 at 13:42

answered Dec 10, 2012 at 13:40

Kao

2,2723 gold badges22 silver badges31 bronze badges

Comments

Barry Chapman · Accepted Answer · 2012-12-10 13:44:00Z

1

function arraycomp( $array1, $array2 ) {
   $diff1 = array_values( $array1 );
   $diff2 = array_values( $array2 );

   sort( $diff1 );
   sort( $diff2 );

   return ( $diff1 === $diff2 );

}

Simply pass in your two arrays to that function.

answered Dec 10, 2012 at 13:44

Barry Chapman

6,7904 gold badges40 silver badges71 bronze badges

1 Comment

Barry Chapman Over a year ago

Bear in mind, that this ignores the key's as you stated in your question that you were checking the values

MAXIM · Accepted Answer · 2012-12-10 13:53:54Z

-1

this should work for you:

sort($array1);
reset($array1);
sort($array2);
reset($array2);
$res = array_diff($array1, $array2);

if($res)
    echo "they match";

edited Dec 10, 2012 at 13:53

answered Dec 10, 2012 at 13:38

MAXIM

1,2311 gold badge9 silver badges16 bronze badges

5 Comments

Barry Chapman Over a year ago

why are you using usort()?

Dale Over a year ago

And without a second parameter? And missing $ from the arrays

MAXIM Over a year ago

Good point. This happenes when you work too much in c )). I hoped to reppresent the idea anyways. Will correct that tho

Barry Chapman Over a year ago

so... why are you using reset()?

MAXIM Over a year ago

Because it is always a good idea to reset the arrays after manipulating them

Collectives™ on Stack Overflow

PHP array key exists

5 Answers 5

Comments

Comments

Comments

1 Comment

5 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

5 Answers 5

Comments

Comments

Comments

1 Comment

5 Comments

Your Answer

Sign up or log in

Post as a guest

Related