- var_dump: documentation ( source)
- array_count_values: documentation ( source)
<?php
$myArray = array('C140 ',' C100 ',' C140 ',' C141 ',' C141 ',' C100 ',' C141 ',' C141 ',
' U103 ',' Q111 ',' C100 ',' U104 ',' C141 ',' C141 ',' C141 ',
' C123 ',' C101 ',' U103 ',' U103 ',' U103 ',' U103 ',' U103 ',' Rt104'
,'D139 ',' C141');
Var_dump(array_count_values($myArray));