I have an array like this
Array
(
[0] => u1,u2
[1] => u2,u1
[2] => u4,u3
[3] => u1,u3
[4] => u1,u2
)
I want to remove similar values from the array I want an out put like
Array
(
[0] => u1,u2
[1] => u4,u3
[2] => u1,u3
)
I tried to loop thru the input array, sort the value of the indexes alphabetically and then tried array_search to find the repeated values. but never really got the desired output
any help apprecated
You cannot use array_unique() alone, since this will only match exact duplicates only. As a result, you'll have to loop over and check each permutation of that value.
You can use array_unique() to begin with, and then loop over:
$myArray = array('u1,u2', 'u2,u1', 'u4,u3', 'u1,u3', 'u1,u2');
$newArr = array_unique($myArray);
$holderArr = array();
foreach($newArr as $val)
{
$parts = explode(',', $val);
$part1 = $parts[0].','.$parts[1];
$part2 = $parts[1].','.$parts[0];
if(!in_array($part1, $holderArr) && !in_array($part2, $holderArr))
{
$holderArr[] = $val;
}
}
$newArr = $holderArr;
The above code will produce the following output:
Array (
[0] => u1,u2
[1] => u4,u3
[2] => u1,u3
)
Use array_unique() PHP function:
Use the function array_unique($array)
array array_unique ( array $array [, int $sort_flags = SORT_STRING ] )
array_unique will work here, since u1,u2 !== u2,u1.since u1,u2 !== u2,u1
$array=array('u1,u2','u2,u1','u4,u3','u1,u3','u1,u2');
foreach($array as $k=>$v)
{
$sub_arr = explode(',',$v);
asort($sub_arr);
$array[$k] = implode(',',$sub_arr);
}
$unique_array = array_unique($array);
//$unique_array = array_values($unique_array) //if you want to preserve the ordered keys
u1,u2 !== u2,u1.array_uniquematches exact values only.