PHP array comparison and finding matched and non matched items - php

Question

I have been using this script for finding matched and nonmatched array items.
My code is.
$filter1 = "red,green,blue,yellow";
$parts1 = explode(',', $filter1);
$filter2 = "red,green,blue";
$parts2 = explode(',', $filter2);
for($i=0; $i< count($parts1); $i++)
{
for($j=0; $j< count($parts2); $j++)
{
if($parts1[$i] == $parts2[$j])
{
$match[] = $parts1[$i];
} else {
$nomatch[] = $parts1[$i];
}
}
}
print_r($match);
echo "<br>";
print_r($nomatch);
By using this code i am only getting the matched items and not nonmatched. Can anybody help.
Thanks in advance.

Answer 1

You can try using array_intersect and array_diff
$filter1 = "red,green,blue,yellow";
$parts1 = explode(',', $filter1);
$filter2 = "red,green,blue";
$parts2 = explode(',', $filter2);
$match = array_intersect($parts1, $parts2);
$nomatch = array_diff($parts1, $parts2);
var_dump($match,$nomatch);
Output
array
0 => string 'red' (length=3)
1 => string 'green' (length=5)
2 => string 'blue' (length=4)
array
3 => string 'yellow' (length=6)

Answer 2

this can be done by array_intersect and array_diff
$filter1 = "red,green,blue,yellow";
$parts1 = explode(',', $filter1);
$filter2 = "red,green,blue";
$parts2 = explode(',', $filter2);
$result = array_intersect($parts1 , $parts2 );
print_r($result);
Live Example
and
$result = array_diff($parts1 , $parts2 );
print_r($result);
LIVE example

Answer 3

because your nested loop not run at yellow color time
try this
$filter1 = "red,green,blue,yellow";
$filter2 = "red,green,blue,gray";
or
for($j=0; $j<= count($parts2); $j++)

Answer 4

$filter1 = "red,green,blue,yellow";
$parts1 = explode(',', $filter1);
$filter2 = "red,green,blue";
$parts2 = explode(',', $filter2);
$match = array();
$nomatch = array();
foreach($parts1 as $v){
if(in_array($v,$parts2))
$match[]=$v;
else
$nomatch[]=$v;
}

Answer 5

try this
$filter1 = "red,green,blue,yellow";
$parts1 = explode(',', $filter1);
$filter2 = "red,green,blue";
$parts2 = explode(',', $filter2);
foreach($parts1 as $first)
{
if(in_array($first, $parts2))
{
$match[] = $first;
}
else
{
$nomatch[] = $first;
}
}
print_r($match);
echo "<br>";
print_r($nomatch);
or you can use array_diff to get non matched items
print_r(array_diff($parts1,$parts2));
and for matched items use
print_r(array_intersect($parts1,$parts2));

Answer 6

Try the below code
$filter1 = "red,green,blue,yellow";
$parts1 = explode(',', $filter1);
$filter2 = "red,green,blue,purple";
$parts2 = explode(',', $filter2);
$matching = array_intersect($parts1, $parts2);
$non_matching = array_diff(array_merge($parts1, $parts2), $matching);
Changing your code, which should have similar result for non-matching as array_diff($parts1, $parts2);
for($i=0; $i< count($parts1); $i++)
{
$is_matching = false;
for($j=0; $j< count($parts2); $j++)
{
if($parts1[$i] == $parts2[$j])
{
$is_matching = true;
break;
}
}
if ($is_matching) {
$match[] = $parts1[$i];
} else {
$nomatch[] = $parts1[$i];
}
}

Answer 7

You can find matching value using array_intersect and non matching value using array_diff.
Here you can see LIVE DEMO
/**
* #param $arr
*/
function pr($arr)
{
echo '<pre>';
print_r($arr);
echo '</pre>';
}
$filter1 = "red,green,blue,yellow";
$parts1 = explode(',', $filter1);
$filter2 = "red,green,blue";
$parts2 = explode(',', $filter2);
$match = array_intersect($parts1, $parts2);
$nomatch = array_diff($parts1, $parts2);
pr($match);
pr($nomatch);
Output Screen:
Array
(
[0] => red
[1] => green
[2] => blue
)
Array
(
[3] => yellow
)