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  1. <?php
  2.  
  3. $numbers = array(2000, 100, 0.1, 0.15, 0.1555);
  4. $results = array();
  5. foreach ($numbers as $input) {
  6. $formatted = preg_replace('/0{1,2}$/', '', number_format($input, 4));
  7. $results[] = $formatted;
  8. }
  9. print_r($results);
Success #stdin #stdout 0.02s 24448KB
stdin
Standard input is empty
stdout
Array
(
    [0] => 2,000.00
    [1] => 100.00
    [2] => 0.10
    [3] => 0.15
    [4] => 0.1555
)