删除除数字以外的所有内容的 PHP 代码
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PHP code to remove everything but numbers
提问by jeffkee
I'm trying to remove everything from a string but just numbers (0-9).
我试图从字符串中删除所有内容，但只删除数字（0-9）。
I thought this would work..
我以为这会奏效..
echo preg_replace("[^0-9]","",'604-619-5135');
But it echos "604-619-5135". What am I missing???
但它与“604-619-5135”相呼应。我错过了什么？？？
回答by Chris Eberle
Try this:
尝试这个：
preg_replace('/[^0-9]/', '', '604-619-5135');
preg_replace uses PCREs which generally start and end with a /.
preg_replace 使用通常以/.
回答by Navneil Naicker
This is for future developers, you can also try this. Simple too
这是为未来的开发者准备的，你也可以试试这个。也简单
echo preg_replace('/\D/', '', '604-619-5135');
回答by SBerg413
You would need to enclose the pattern in a delimiter - typically a slash (/) is used. Try this:
您需要将模式括在分隔符中 - 通常使用斜杠 (/)。尝试这个：
echo preg_replace("/[^0-9]/","",'604-619-5135');
回答by Alp Altunel
a much more practical way for those who do not want to use regex:
对于那些不想使用正则表达式的人来说，这是一种更实用的方法：
$data = filter_var($data, FILTER_SANITIZE_NUMBER_INT);
note: it works with phone numbers too.
注意：它也适用于电话号码。
