單一的儀表板電話號碼 - 正則表達式驗證

Question

我需要一個簡單的正則表達式來驗證形式爲xy的電話號碼，其中x和y可以表示任意數量的數字，並且短劃線是可選的，但是如果它確實顯示它最在字符串內（短劃線必須在其左側和右側有數字）

Answer 1

/^\d+(?:-\d+)?$/應該做的伎倆。

Answer 2

/^ \ d +（ - \ d +）？$ /）似乎工作。它匹配一個或多個前導數字，並帶有可選的「連字符後跟一個或多個數字」。

#!/usr/bin/perl 
# 
@A = ("1-2", 
     "-12", 
     "12-", 
     "123-1234", 
     "1-", 
     "-1", 
     "123", 
     "1", 
     "foo-bar", 
     "12foo34", 
     "foo12-34", 
     "12f-o34", 
     ); 

foreach (@A) { 
    if (/^\d+(-\d+)?$/) { 
    print "\"$_\" is a phone number\n"; 
    } else{ 
    print "\"$_\" is NOT a phone number\n"; 
    } 
} 

給出：

$ ./phone.pl 
"1-2" is a phone number 
"-12" is NOT a phone number 
"12-" is NOT a phone number 
"123-1234" is a phone number 
"1-" is NOT a phone number 
"-1" is NOT a phone number 
"123" is a phone number 
"1" is a phone number 
"foo-bar" is NOT a phone number 
"12foo34" is NOT a phone number 
"foo12-34" is NOT a phone number 
"12f-o34" is NOT a phone number