สอบถาม มี string แล้วต้องการตัวเลขทศนิยม พอจะมีวิธีอะไรบ้างครับ ขอคำแนะนำด้วยครับ

<?php

    function get_numerics ($str) {
        preg_match_all('/\d+/', $str, $matches);
        return $matches[0];
    }

    $one = 'one two 4 three (5 four five)';
    $two = 'one two 2 three';
    $three =  'one two 12 three (3 four)';
    $four = 'one two 3 three (13 four five)';

    print_r(get_numerics($one));
    print_r(get_numerics($two));
    print_r(get_numerics($three));
    print_r(get_numerics($four));
?>

$input1= "- 2.0 (F10) TwinPower Turbo ";
$input2= "- GRANDIS 2.8 GLX (ABS/SRS) ";
$input3= "- CAB 2.5 GLX (CD/MP3) (MNC) (MY10)";
echo $output = number_format(ereg_replace("[^0-9\.]","",$input1),1);
echo "<br>";
echo $output = number_format(ereg_replace("[^0-9\.]","",$input2),1);
echo "<br>";
echo $output = number_format(ereg_replace("[^0-9\.]","",$input3),1);