<?php
$array = [
1 => [
"name" => "ОК - 3 ( 2.2 )",
"schet" => "149",
"floor" => "12",
"col" => "1",
"м2" => "2.48",
"date" => "27.02.2025"
],
2 => [
"name" => "ОК - 3 ( 2.2 )",
"schet" => "149",
"floor" => "12",
"col" => "1",
"м2" => "2.48",
"date" => "27.02.2025"
],
3 => [
"name" => "ОК - 3 ( 2.2 )",
"schet" => "149",
"floor" => "12",
"col" => "1",
"м2" => "2.48",
"date" => "27.02.2025"
],
4 => [
"name" => "ОК - 3 ( 2.2 )",
"schet" => "149",
"floor" => "12",
"col" => "1",
"м2" => "2.48",
"date" => "27.02.2025"
],
5 => [
"name" => "ОК - 3 ( 2.2 )",
"schet" => "149",
"floor" => "12",
"col" => "1",
"м2" => "2.48",
"date" => "27.02.2025"
],
6 => [
"name" => "ОК - 3 ( 2.2 )",
"schet" => "149",
"floor" => "12",
"col" => "1",
"м2" => "2.48",
"date" => "27.02.2025"
]
];
// Считаем количество значений
$count_values = array_count_values($arr[1]);
print_r($count_values);
// Фильтруем те котовых больше 1
$repits = array_filter($count_values, fn($el) => $el > 1);
print_r($repits);