Get Count of particular entity in array inside array? - php

Question

I have an array named hello as follows,
hello(
0 => ([name => abc, add=>def, city=>ny,phone=>12345]);
1 => ([name => pqr, add=>mno, city=>qw,phone=>67890]);
2 => ([name => abc, add=>def, city=>ny,phone=>14785]);
3 => ([name => ghi, add=>foo, city=>yu,phone=>258]);
4 => ([name => jkl, add=>exy, city=>ny,phone=>95145]);
);
It has few elements and that elements are also array itself, like while retring query result.
I want to count a perticular name that repeats. Like in hello[0] and hello[2], so my ans should be abc=2.
How can I do that?
Thanks.

Answer 1

Edit 2:
Now you want a way to count all of the objects:
$arr = [
0 => (object) ['name' => 'abc', 'add'=>'def', 'city'=>'ny', 'phone'=>'12345'],
1 => (object) ['name' => 'pqr', 'add'=>'mno', 'city'=>'qw', 'phone'=>'67890'],
2 => (object) ['name' => 'abc', 'add'=>'def', 'city'=>'ny', 'phone'=>'14785'],
3 => (object) ['name' => 'ghi', 'add'=>'foo', 'city'=>'yu', 'phone'=>'258'],
4 => (object) ['name' => 'jkl', 'add'=>'exy', 'city'=>'ny', 'phone'=>'95145'],
];
function countBy (callable $f, $xs) {
return array_reduce($xs, function ($acc, $x) use ($f) {
$y = call_user_func($f, $x);
$acc[$y] = isset($acc[$y]) ? $acc[$y] + 1 : 1;
return $acc;
}, []);
}
json_encode(countBy (function ($x) { return $x->name; }, $arr));
// => { "abc": 2, "pqr": 1, "ghi": 1, "jkl": 1 }
Edit:
You lied about the data types so I changed $x['name'] to $x->name and $x[$attr] to $x->{$name}
You can use array_reduce
array_reduce($arr, function ($acc, $x) {
return $x->name === 'abc' ? $acc + 1 : $acc;
}, 0);
// => 2
Or write it as a function
function countAttr($attr, $match, $xs) {
return array_reduce($xs, function ($acc, $x) use ($attr, $match) {
return $x->{$attr} === $match ? $acc + 1 : $acc;
}, 0);
}
countAttr('name', 'abc', $arr)(
// => 2

Answer 2

In this case defining a function would be best so that count for any name cen be get. You can try this -
$array = [
0 => ['name' => 'abc', 'add'=>'def', 'city'=>'ny','phone'=>'12345'],
1 => ['name' => 'pqr', 'add'=>'mno', 'city'=>'qw','phone'=>'67890'],
2 => ['name' => 'abc', 'add'=>'def', 'city'=>'ny','phone'=>'14785'],
3 => ['name' => 'ghi', 'add'=>'foo', 'city'=>'yu','phone'=>'258'],
4 => ['name' => 'jkl', 'add'=>'exy', 'city'=>'ny','phone'=>'95145'],
];
function get_name_count($array, $name)
{
// filter array for name
$temp = array_filter($array, function($a) use($name) {
return ($a['name'] === $name);
});
// return count
return count($temp);
}
var_dump(get_name_count($array, 'abc'));
Output
int(2)

Answer 3

// hello , please use some standard name for array
// code not tested
// define variable if required
$field_name="name";
$value="abc";
$count=0;
echo count_field($field_name,$value);
function count_field($field_name,$value)
{
foreach($hello as $val)
{
if($val[$field_name]==$value)
{
$count++;
}
}
return $count;
}