How to properly use array_walk() function to count specific values in PHP?

Question

I can't sleep well with this one problem. I couldn't find other solution. I have tried some functions, but I can't achieve desirable result with those. So one guy told me to use array_walk(). Yes this function does what I want, but i can't or i don't know how to properly insert it in my code.

My PHP code:

$d=array();
foreach(range(0, 3) as $rs) {
    foreach(range(0, 5) as $c){

        //here is working php code to generate '$randomRs' by '$rs' and '$c' vars..

        $d['rs'.$rs]['c'.$c] = $randomRs;

    }
}

Generated JSON output:

{
"rs0":{
   "c0":"pl",
   "c1":"wd",
   "c2":"wd",
   "c3":"pl",
   "c4":"bl"
},
"rs1":{
   "c0":"gr",
   "c1":"gr",
   "c2":"lk",
   "c3":"gr",
   "c4":"lk"
}
and so on...

All i need is one simple code to count specific values of that array. For example: i need to count how many "wd" and "lk" there is in array. Guy told me to use array_walk(), but i am new with those array's and i really need some advise!

Possible duplicate of Count specific values in multidimensional array — miken32
– miken32, Commented Feb 1, 2017 at 21:51
@miken32 I have tried those in that thread, but i need to search by value, not by key.. — user3292639
– user3292639, Commented Feb 1, 2017 at 21:57
@jeroen dunno. All i need is to count key values. That's it. He told me that I can use array_walk() for that. — user3292639
– user3292639, Commented Feb 1, 2017 at 21:59

AbraCadaver · Accepted Answer · 2017-02-01 22:39:01Z

2

Inside your loop just use:

$temp[] = $randomRs;

Then you can count them easily:

$count = array_count_values($temp);
echo $count['wd'];

answered Feb 1, 2017 at 22:39

AbraCadaver

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