Count from two array php - php

Question

I have two array, arrLevel1 and arrLevel2.
I want to count animal that can walk.
How can I do that array stucture like this?
Thx before. I already tried, but it failed.
arrLevel1:
array(4) {
[0]=>
array(1) {
["Walk"]=>
string(4) "Bird"
}
[1]=>
array(1) {
["Walk"]=>
string(3) "Cat"
}
[2]=>
array(1) {
["Fly"]=>
string(9) "ButterFLy"
}
[3]=>
array(1) {
["Fly"]=>
string(4) "Bird"
}
}
arrLevel2:
array(3) {
[0]=>
array(1) {
["Animal"]=>
string(3) "Fly"
}
[1]=>
array(1) {
["Animal"]=>
string(11) "Walk"
}
[2]=>
array(1) {
["Human"]=>
string(11) "Walk"
}
}

Answer 1

Just check them in a loop
For the first arrLevel1:
<?php
$arrLevel1 = array(array("walk"=>"Bird"),array("walk"=>"Cat"),array("Fly"=>"Butterfly"),array("Fly"=>"Bird"));
$x = 0;
foreach($arrLevel1 as $p){
if($p["walk"]!==null){
$x++;
}
}
var_dump($x);
?>
Hope thsi helps you

Answer 2

One way to do it is using array_reduce():
$array = array(array('Walk' => 'Bird'), array('Walk' => 'Cat'), array('Fly' => 'ButterFly'), array('Fly' => 'Bird'));
$count = array_reduce($array, function($carry, $item) {
return key($item) == 'Walk' ? $carry + 1 : $carry;
}, 0);
var_dump($count);
You can use a similar code for the second version:
$array = array(array('Animal' => 'Fly'), array('Animal' => 'Walk'), array('Human' => 'Walk'));
$count = array_reduce($array, function($carry, $item) {
return reset($item) == 'Walk' ? $carry + 1 : $carry;
}, 0);
var_dump($count);