Real filter float helper

filter_float.php

<?php
$data = array(
0 => '1,000.214525844156$', //    1000.21
1 => '1,250.2525698',       //    1250.25
2 => '10',                  //      10.00
3 => 100.21236985,          //     100.21
4 => '1,10',                //       1.10  
5 => '1,000,000,01'         // 1000000.01
);

function filter_float($value, $decimal = 2)
{
	$value = filter_var($value, FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION | FILTER_FLAG_ALLOW_THOUSAND);
	
	if (preg_match('/[,|\.](\d*)$/', $value, $match)) {
		$value = preg_replace('/' . $match[0] . '$/', '.' . $match[1], $value);
	}
	
	return bcadd(0, floor(str_replace(',', '', $value) * 100) / 100, $decimal);
}

foreach($data as $amount){
    echo filter_float($amount) . '<br />';
}

?>
<pre>
0 => '1,000.214525844156$', //    1000.21
1 => '1,250.2525698',       //    1250.25
2 => '10',                  //      10.00
3 => 100.21236985,          //     100.21
4 => '1,10',                //       1.10  
5 => '1,000,000,01'         // 1000000.01
</pre>