如何使用正则表达式验证器来获取电话号码，如999-999-9999 [英] How to use regex validator for phone numbers like 999-999-9999
问题描述
我正在尝试为这种格式的电话号码制作一个正则表达式模式：999-999-9999
I'm trying to make a regex pattern for phone numbers like this format : 999-999-9999
所以我尝试了这个表达式：
So I tried this expression :
\+\d(-\d{3}){2}-\d{4}
但格式适用于以下数字：+ 1-999-999-9999
But the format works on numbers like : +1-999-999-9999
如果有人帮我修改模式以使其与格式999-999-9999匹配，我将不胜感激，这意味着我不希望用户在字符串的第一个区域输入+号
I would appreciate if someone help me modifying the pattern to make it match the format 999-999-9999 , which means I don't want the user to enter the + sign at first of the string
谢谢
推荐答案
表达式 \ + \ d（-\d {3}）{2} -\d {4} 您已尝试明确说：
The expression \+\d(-\d{3}){2}-\d{4} you have tried explicitly says:
A
+后跟一个数字后跟一个连字符和3位数（两次）后跟4位数。
A
+followed by a single digit followed by a hyphen and 3 digits (two times) followed by 4 digits.
如果您不想要 + 和第一个数字，请不要在正则表达式中包含这些数字。
If you don't want the + and the first single digit, don't include those in your regular expression.
此表达式 \d {3} -\d {3} -\d {4} 说：
3位数后跟一个连字符后跟3位数后跟一个连字符后跟4位数。
3 digits followed by a hyphen followed by 3 digits followed by a hyphen followed by 4 digits.
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