什么正则表达式将检查GPS值？

I'm letting users enter GPS values through a form, they all have the same form, some examples:

我让用户通过表单输入GPS值，它们都具有相同的形式，例如：

49.082243,19.302628  

48.234142,19.200423  

49.002524,19.312578

I want to check the entered value using PHP (using preg_match(), I guess), but as I'm not good in regex expressions (oh, dumb me, I should finally learn it, I know), I don't know how to write the expression.

我想用PHP检查输入的值（我猜是使用preg_match（）），但因为我在正则表达式中不好（哦，笨我，我应该最后学习它，我知道），我不知道如何写表达式。

Obviously it should be:
2x (numbers), 1x (dot), 6x (numbers), 1x (comma), 2x (numbers), 1x (dot), 6x (numbers)

显然它应该是：2x（数字），1x（点），6x（数字），1x（逗号），2x（数字），1x（点），6x（数字）

Any suggestions how to write this in regex?

有关如何在正则表达式中写这个的任何建议吗？

5 个解决方案

#1

Something like:

就像是：

/^(-?\d{1,2}\.\d{6}),(-?\d{1,2}\.\d{6})$/

^ anchors at the start of input
^在输入开始时锚定
-? allows for, but does not require, a negative sign
- ？允许但不要求负号
\d{1,2} requires 1 or 2 decimal digits
\ d {1,2}需要1或2个十进制数字
\. requires a decimal point
\。需要一个小数点
\d{6} requires exactly 6 decimal digits
\ d {6}正好需要6位小数
, matches a single comma
，匹配一个逗号
(repeat the first 5 bullets)
（重复前5个子弹）
$ anchors at the end of input
输入结束时的$ anchors

I have included capturing parentheses to allow you to extract the individual coordinates. Feel free to omit them if you don't need that.

我已经包括捕获括号以允许您提取单个坐标。如果您不需要，请随意省略它们。

All-around useful regex reference: http://www.regular-expressions.info/reference.html

全面有用的正则表达式参考：http：//www.regular-expressions.info/reference.html

#2

The other answers I see don't take into account that longitude goes from -180 to 180 and latitude goes from -90 to 90.

我看到的其他答案没有考虑到经度从-180到180，纬度从-90到90。

The proper regex for this would be (assuming the order is "latitude, longitude"):

正确的正则表达式是（假设顺序是“纬度，经度”）：

/^(-?[1-8]?\d(?:\.\d{1,6})?|90(?:\.0{1,6})?),(-?(?:1[0-7]|[1-9])?\d(?:\.\d{1,6})?|180(?:\.0{1,6})?)$/

This regex covers having no less than -90 and no more than 90 for latitude as well as no less than -180 and no more than 180 for longitude while allowing them to put in whole numbers as well as any number of decimal places from 1 to 6, if you want to allow greater precision just change {1,6} to {1,x} where x is the number of decimal place

这个正则表达式包括纬度不小于-90且不大于90，经度不小于-180且不大于180，同时允许它们输入整数以及从1到1的任意小数位数6，如果你想允许更高的精度，只需将{1,6}更改为{1，x}，其中x是小数位数

Also, if you capture on group 1 you get the latitude and a capture on group 2 gets the longitude.

此外，如果您在组1上捕获，则获得纬度，组2上的捕获获得经度。

#3

/$-?\d{2}\.\d{6},-?\d{2}\.\d{6}^/

#4

Expanding on the other answer:

扩展其他答案：

/^-?\d\d?\.\d+,-?\d\d?\.\d+$/

#5

Based on your example, this will do it:

根据您的示例，这将执行此操作：

if (preg_match('/(-?[\d]{2}\.[\d]{6},?){2}/', $coords)) {
    # Successful match
} else {
    # Match attempt failed
}

Explanation:

说明：

(          # Match the regular expression below and capture its match into backreference number 1
-          # Match the character “-” literally
?          # Between zero and one times, as many times as possible, giving back as needed (greedy)
[\d]       # Match a single digit 0..9
{2}        # Exactly 2 times
\.         # Match the character “.” literally
[\d]       # Match a single digit 0..9
{6}        # Exactly 6 times
,          # Match the character “,” literally
?          # Between zero and one times, as many times as possible, giving back as needed (greedy)
){2}       # Exactly 2 times

#1