Find common value within two array in php

Question

Implement the find_common function. When passed two arrays of names, it will return an array containing the names that appear in either or both arrays. The returned array should have no duplicates.

<?php
class Names
{
 public static function find_common($array1, $array2)
 {
    $arr = array();
    foreach($array1 as $value1){
        if(in_array($value1,$array2)){
            array_push($arr,$value1);
        }
    }

    return $arr;
  }
}

$names = Names::find_common(['Ava', 'Emma', 'Olivia'], ['Olivia', 'Sophia', 'Emma']);
echo join(', ', $names); // should print Emma, Olivia, Ava, Sophia

OUTPUT SHOUD PRINT: Emma, Olivia, Ava, Sophia What I am getting is only the Emma, Olivia :(

Just refer to the output. It should output : Emma, Olivia, Ava, Sophia — minion
– minion, Commented Sep 26, 2018 at 10:14

niiwig · Accepted Answer · 2018-09-26 10:17:02Z

3

Use

array_unique(array_merge(['Ava', 'Emma', 'Olivia'], ['Olivia', 'Sophia', 'Emma']));

array_merge will put all values in a single array then array_unique wil remove duplicates.

answered Sep 26, 2018 at 10:17

niiwig

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5 Comments

minion Over a year ago

That's It!!!!! Thank you sir. Maybe you can help me more with my problem?

niiwig Over a year ago

What problem do you still have ? Can't the answer be accepted ?

minion Over a year ago

After 2 mins I can accept your answer! Can you pls give me your contact? I have many problems :(

niiwig Over a year ago

Thanks but I won't have time to go through all your problems privately. But I'm not the only one who can help you here, don't hesitate to ask more questions !

minion Over a year ago

One more problem. Pls give me your contact

delboy1978uk · Accepted Answer · 2018-09-26 10:19:54Z

1

This is real easy. Use array_intersect():

array_intersect(['Ava', 'Emma', 'Olivia'], ['Olivia', 'Sophia', 'Emma']);

Array will contain Emma & Olivia.

Check the docs! :-) http://php.net/manual/en/function.array-intersect.php

UPDATE Your question doesn't reflect your desired output. Do you really mean to ask how to merge arrays without duplicates?

If that's the case, merge the array with

array_unique(array_merge(['Ava', 'Emma', 'Olivia'], ['Olivia', 'Sophia', 'Emma']));

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

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

edited Sep 26, 2018 at 10:19

answered Sep 26, 2018 at 10:15

delboy1978uk

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3 Comments

minion Over a year ago

Your output is only Emma and olivia. Output should be Emma, Olivia, Ava, Sophia

niiwig Over a year ago

He said the output should print Emma, Olivia, Ava, Sophia ;)

delboy1978uk Over a year ago

Yup so he needs a merge then. Updating

Mariano · Accepted Answer · 2020-06-12 18:33:59Z

0

Try This works for me:

function unique_names(array $array1, array $array2) : array
    { 
     $array3= array_intersect($array1,$array2);
     return array_unique(array_merge($array3,$array1, $array2)); 
    }

edited Jun 12, 2020 at 18:33

answered Jun 12, 2020 at 18:25

Mariano

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Comments

David Buck · Accepted Answer · 2020-06-12 18:44:45Z

0

$names = unique_names(['Ava', 'Emma', 'Olivia'], ['Olivia', 'Sophia', 'Emma']);
echo join(', ', $names); // should print Emma, Olivia, Ava, Sophia

edited Jun 12, 2020 at 18:44

David Buck

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answered Jun 12, 2020 at 18:20

Mariano

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1 Comment

β.εηοιτ.βε Over a year ago

While this code may answer the question, providing additional context regarding why and/or how this code answers the question improves its long-term value.

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