format a number

There is never a good, generalized solution, when you want PHP to give you what amounts to the "wrong" answer with numbers.  This works, given the test data, but I would not want to depend on it.
http://iconoun.com/demo/temp_robert_saylor.php

<?php // demo/temp_robert_saylor.php
error_reporting(E_ALL);

/**
 * SEE: http://www.experts-exchange.com/Programming/Languages/Scripting/PHP/Q_28579407.html
 * REF: http://php.net/manual/en/function.floor.php#88197
 *
 * Example: 28.955875 should be 28.95 I don't want 28.96
 */

// RAW DATA
$float = 28.955875;

// FORCE TYPECASTING TO STRING AND TRUNCATE THE DATA
$numbr = substr("$float",0,5);

var_dump($float, $numbr);

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Thanks Gary and Ray! Glad you guys are always online :) And yep this was for calculating dollars.