<?php function format_number($number) { $str = number_format($number, 4, '.', ''); $str = preg_replace('/(?<=\.\d\d)0+$/', '', $str); return $str; } var_dump(format_number(4.0)); var_dump(format_number(4.5)); var_dump(format_number(4.454)); var_dump(format_number(4.54545454)); var_dump(format_number(4.450));
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