什么正则表达式将检查 GPS 值？

发布于 2024-11-30 05:27:40 字数 328 浏览 0 评论 0原文

我让用户通过表单输入 GPS 值，它们都有相同的表单，一些示例：

49.082243,19.302628  

48.234142,19.200423  

49.002524,19.312578

我想使用 PHP 检查输入的值（我猜使用 preg_match()），但作为我不擅长正则表达式（哦，愚蠢的我，我终于应该学习它，我知道），我不知道如何编写表达式。

显然应该是：
2x（数字）、1x（点）、6x（数字）、1x（逗号）、2x（数字）、1x（点）、6x（数字）

有什么建议如何在正则表达式中编写这个？

原文

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

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.

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

Any suggestions how to write this in regex?

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蓝梦月影 2024-12-07 05:27:40

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。

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})?)$/

这个正则表达式涵盖纬度不小于-90且不大于90，经度不小于-180且不大于180，同时允许输入整数和任意数字小数位数从 1 到 6，如果您想允许更高的精度，只需将 {1,6} 更改为 {1,x}，其中 x 是小数位数

此外，如果您在组 1 上捕获，您将获得纬度和 a第 2 组的捕获获取经度。

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

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

/^(-?[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

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

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埖埖迣鎅 2024-12-07 05:27:40

类似于：

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

^ 锚点位于输入
-? 的开头，允许但不要求使用负号
\d{1,2} 需要 1 或 2 个十进制数字
\. 需要一个小数点
\d{6} 需要正好 6 个十进制数字
, 匹配单个逗号
(重复前 5 个项目符号）
输入末尾的 $ 锚点

我包含了捕获括号，以便您提取各个坐标。如果您不需要，请随意忽略它们。

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

Something like:

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

^ anchors at the start of input
-? allows for, but does not require, a negative sign
\d{1,2} requires 1 or 2 decimal digits
\. requires a decimal point
\d{6} requires exactly 6 decimal digits
, matches a single comma
(repeat the first 5 bullets)
$ anchors at the end of input

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

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

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稀香 2024-12-07 05:27:40

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

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

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农村范ル 2024-12-07 05:27:40

扩展另一个答案：

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

Expanding on the other answer:

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

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倾｀听者〃 2024-12-07 05:27:40

根据您的示例，这将完成：

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

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

Based on your example, this will do it:

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

Explanation:

(          # 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

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