<?php $arr = [ 1 => ['A' => '1', 'C' => 'TEMU3076746'], 2 => ['A' => '2', 'C' => 'FCIU5412720'], 3 => ['A' => '3', 'C' => 'TEMU3076746'], 4 => ['A' => '4', 'C' => 'TEMU3076746'], 5 => ['A' => '5', 'C' => 'FCIU5412720'] ]; echo count(array_column($arr, 'C', 'C'));
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