How to ignore case sensitivity and count array values?

Question

What might be the simplest way to count array values regardless of case sensitivities?

Attempt

$arr=array("A","B","b","A","b", "a", "A");
print_r(array_count_values($arr));

or:

$arr=array("AliCE","Alice","bob","AlICE","BOB", "aLIce", "alice");
print_r(array_count_values($arr));

Demo

Current Output

Array
(
    [A] => 3
    [B] => 1
    [b] => 2
    [a] => 1
)

Desire Output

Array
(
    [A] => 4
    [B] => 2
)

Or:

Array
(
    [a] => 4
    [b] => 2
)

array_map/strtoupper beforehand.

mario
– mario

2019-06-18 18:30:29 +00:00
Commented Jun 18, 2019 at 18:30 — mario
– mario, Commented Jun 18, 2019 at 18:30
Covered within stackoverflow.com/q/28657236/2943403

mickmackusa
– mickmackusa ♦

2019-08-22 11:50:37 +00:00
Commented Aug 22, 2019 at 11:50 — mickmackusa
– mickmackusa ♦, Commented Aug 22, 2019 at 11:50

Sash Sinha · Accepted Answer · 2019-06-18 18:33:32Z

3

You can map the letters to uppercase first using strtoupper:

$arr = array("A","B","b","A","b", "a", "A");
print_r(array_count_values(array_map('strtoupper', $arr)));

Output:

(
    [A] => 4
    [B] => 3
)

answered Jun 18, 2019 at 18:33

Sash Sinha

22.8k4 gold badges27 silver badges48 bronze badges

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

2 Comments

Sash Sinha Over a year ago

I didn't see mario's comment until after I came back to the question. I had opened a PHP console in another tab.

Sash Sinha Over a year ago

@JedLynch I feel ya happened today to me for a couple of python questions by like literally seconds.

AbraCadaver · Accepted Answer · 2019-06-18 18:37:31Z

1

I would use array_map but as an alternate, join into a string, change case, split into an array:

print_r(array_count_values(str_split(strtolower(implode($arr)))));

answered Jun 18, 2019 at 18:37

AbraCadaver

79.2k7 gold badges75 silver badges91 bronze badges

Comments

Rakesh Jakhar · Accepted Answer · 2019-06-18 19:35:07Z

0

You can use foreach with array_key_exists and strtoupper

$arr=array("A","B","b","A","b", "a", "A");
$res = [];
foreach($arr as $k => $v){
    array_key_exists(strtoupper($v), $res) ? ($res[strtoupper($v)]++) : ($res[strtoupper($v)] = 1); 
}
print_r($res);

Working Example

answered Jun 18, 2019 at 19:35

Rakesh Jakhar

6,4082 gold badges13 silver badges20 bronze badges

Collectives™ on Stack Overflow

How to ignore case sensitivity and count array values?

Attempt

Demo

Current Output

Desire Output

3 Answers 3

2 Comments

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

Attempt

Current Output

Desire Output

3 Answers 3

2 Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related