提取小数或整数字符串

Question

如：

$str .= "Additional tax(2.34)"; 
$str .= "Additional tax(3)"; 

谁能帮我提取从字符串的数量。我需要这样的

Array ([0] => 2.34 [1] => 3); 

Answer 1

阵列格式这应做到：

<?php 
    $str = ''; 
    $str .= "Additional tax(2.34)"; 
    $str .= "Additional tax(3)"; 

    if (preg_match_all('/\((\d+(?:\.\d+)?)\)/', $str, $matches) > 0) { 
     var_dump($matches[1]); 
    } 
?>