PHP 从数字字符串中删除逗号
在 PHP 中，我有一个变量数组，它们都是字符串.一些存储的值是带逗号的数字字符串.
In PHP, I have an array of variables that are ALL strings. Some of the values stored are numeric strings with commas.
我需要什么:
一种从字符串中修剪逗号的方法，并且仅对数字字符串执行此操作.这并不像看起来那么简单.主要原因是以下失败:
A way to trim the commas from strings, and ONLY do this for numeric strings. This isn't as straightforward as it looks. The main reason is that the following fails:
$a = "1,435";
if(is_numeric($a))
$a = str_replace(',', '', $a);
这失败了，因为 $a = "1435" 是数字.但是 $a = "1,435" 不是数字.因为我得到的一些字符串将是带逗号的常规句子，所以我无法对每个字符串运行字符串替换.
This fails because $a = "1435" is numeric. But $a = "1,435" is not numeric. Because some of the strings I get will be regular sentences with commas, I can't run a string replace on every string.
推荐答案
未测试，但可能类似于 if(preg_match("/^[0-9,]+$/", $a)) $a = str_replace(...)
Not tested, but probably something like if(preg_match("/^[0-9,]+$/", $a)) $a = str_replace(...)
相关文章