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@ 2019-09-16T13:43:37Z

<?php
$records = [
	['id' => 1],
	['id' => 2],
	['id' => 3],
	['id' => 4],
	['id' => 4],
	['id' => 4],
	['id' => 5]
];
$r = array_count_values(array_column($records, 'id'));
foreach($r as $k => $v){
	echo $k;
	echo ($v>1) ? " ({$v})" : '';
	echo ''."\n";
}

Output
Performance
VLD
References
Branches

array_count_values: documentation ( source)
array_column: documentation ( source)

preferences:dark modelive preview

54.23 ms | 402 KiB | 5 Q