Sort array based on duplicate values

Question

I have an array which contains duplicate values. I want to sort the array so that the values with the most duplicates appear first in line.

I want an output like:

Rihanna
U2
Becca
Taylor Swift

My file that contains data:

rihanna
rihanna
rihanna
rihanna
taylor swift
becca
becca
u2
u2
u2

My code as is which wont work:

$input = file_get_contents('files');
$input = explode("\n", $input);

$acv = array_count_values($input);
$acv = arsort($acv); 
$result = array_keys($acv);
print_r($acv); //Outputs Blank

I tried the following code before: print_r(array_unique($input)); but doesnt sort by order i want. Returns: Array ( [0] => rihanna [4] => taylor swift [5] => becca [7] => u2 [10] => ) — William
– William, Commented Jun 9, 2017 at 11:06
On what basis do you want the sorting to be done? You should do the sorting after the sanitizing the duplicates. — Henkealg
– Henkealg, Commented Jun 9, 2017 at 11:11

Rahul · Accepted Answer · 2017-06-09 11:27:13Z

1

Here is your solution your array is :

$arr = array('rihanna','rihanna','rihanna','rihanna','taylor swift','becca','becca','u2','u2','u2');

$acv = array_count_values($input);
// If need to remove element with count = 1

foreach($acv as $key => $value)
{
    echo $value;
    if($value == 1)
    {
        unset($nArr[$key]);
    }
}
//End
$fArr = array_flip($acv);

krsort($fArr);
print_r(array_values($fArr));

//output
Array
(
    [0] => rihanna
    [1] => u2
    [2] => becca
    [3] => taylor swift
)

edited Jun 9, 2017 at 11:27

answered Jun 9, 2017 at 11:14

Rahul

2,4802 gold badges12 silver badges17 bronze badges

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

1 Comment

William Over a year ago

That works a charm! Thank you very much. For educational purposes.. How would one go about making it display AS IS above, but without taylor swift? So display in order by highest dupe but dont display a result if there is only one record of it?

Collectives™ on Stack Overflow

Sort array based on duplicate values

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related