从一个字符串中提取所有的电话号码

Question

我有一个用来识别电话号码的正则表达式。

^(\+\d{1,2}\s)?\(?\d{3}\)?[\s.-]\d{3}[\s.-]\d{4}$

我想要做的是从一个字符串中提取所有电话号码，并将其存储在一个数组中。我就是这么做的：

 var rtel = new RegExp(/^(\+\d{1,2}\s)?\(?\d{3}\)?[\s.-]\d{3}[\s.-]\d{4}$/gi)

 var r = "Inthe (555)-555-5555 pavithrarox @gmail.com strings below, you 'll find that the content of each 1. abc .  pavithraprbd@gmail.com  line is indented by some whitespace from the index of the line (the number is a part of the text to match). Try writing a pattern that can match each line regardless of how much whitespace is between the number and the content. Notice that the whitespace characters are just like any other character and the special metacharacters like the star and the plus can be used as well.".match(rtel);

但只有当完整字符串仅与正则表达式匹配时，才会匹配。如何从字符串中获取所有电话号码。我错过了什么？

Answer 1

删除正则表达式中的^ (开始)和$ (结束)锚点。如果你把它们放进去，你的整个字符串必须匹配。

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var anchors = new RegExp(/^(\+\d{1,2}\s)?\(?\d{3}\)?[\s.-]\d{3}[\s.-]\d{4}$/gi);

var no_anchors = new RegExp(/(\+\d{1,2}\s)?\(?\d{3}\)?[\s.-]\d{3}[\s.-]\d{4}/gi);

var testString1 = "Inthe (555)-555-5555 pavithrarox @gmail.com strings below, you 'll find that the content of each 1. abc .  pavithraprbd@gmail.com  line is indented by some whitespace from the index of the line (the number is a part of the text to match). Try writing a pattern that can match each line regardless of how much whitespace is between the number and the content. Notice that the whitespace characters are just like any other character and the special metacharacters like the star and the plus can be used as well.";

var testString2 = "(555)-555-5555";

console.log("testString1 - anchors: ", testString1.match(anchors)) // null
console.log("testString1 - no_anchors: ", testString1.match(no_anchors)) // ['(555)-555-5555']

console.log("testString2 - anchors: ", testString2.match(anchors)) // ['(555)-555-5555']
console.log("testString2 - no_anchors: ", testString2.match(no_anchors)) // ['(555)-555-5555']

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