如何确定 PHP 字符串是否仅包含纬度和经度

发布于 2024-08-23 08:31:31 字数 314 浏览 2 评论 0原文

我必须使用可能包含纬度/经度数据的字符串,如下所示:

$query = "-33.805789,151.002060";
$query = "-33.805789, 151.002060";
$query = "OVER HERE: -33.805789,151.002060";

就我的目的而言,前两个字符串是正确的,但最后一个字符串不正确。我正在尝试找出一种匹配模式,该模式将匹配以逗号分隔的纬度和经度,或者逗号和空格。但是,如果字符串中包含除数字、空格、点、减号和逗号之外的任何内容,则匹配失败。

希望这是有道理的,TIA!

I have to work with strings which may contain Lat/Long data, like this:

$query = "-33.805789,151.002060";
$query = "-33.805789, 151.002060";
$query = "OVER HERE: -33.805789,151.002060";

For my purposes, the first 2 strings are correct, but the last one isn't. I am trying to figure out a match pattern which would match a lat and long separated by a comma, or a comma and a space. But if it has anything in the string other than numbers, spaces, dots, minus signs and commas, then it should fail the match.

Hope this makes sense, and TIA!

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陌生 2024-08-30 08:31:31
^[+-]?\d+\.\d+, ?[+-]?\d+\.\d+$

开头的 ^ 和结尾的 $ 确保它匹配完整的字符串,而不仅仅是其中的一部分。

^[+-]?\d+\.\d+, ?[+-]?\d+\.\d+$

The ^ at the start and $ at the end make sure that it matches the complete string, and not just a part of it.

紫瑟鸿黎 2024-08-30 08:31:31

按照其他答案中的建议,使用正则表达式解决是最简单的。这是一个也可行的分步方法:

$result = explode(",", $query);  // Split the string by commas
$lat = trim($result[0]);         // Clean whitespace
$lon = trim($result[1]);         // Clean whitespace

if ((is_numeric($lat)) and (is_numeric($lon))) echo "Valid coordinates!";

此解决方案将接受逗号后的任意数据:

 "-33.805789,151.002060,ABNSBOFVJDPENVÜE";

将正常通过。

正如 Frank Farmer 正确指出的那样,is_numeric 还将识别科学记数法。

It's simplest to solve with a regex as suggested in the other answers. Here is a step-by-step approach that would work too:

$result = explode(",", $query);  // Split the string by commas
$lat = trim($result[0]);         // Clean whitespace
$lon = trim($result[1]);         // Clean whitespace

if ((is_numeric($lat)) and (is_numeric($lon))) echo "Valid coordinates!";

This solution will accept arbitrary data after a comma:

 "-33.805789,151.002060,ABNSBOFVJDPENVÜE";

will pass as ok.

As Frank Farmer correctly notes, is_numeric will also recognize scientific notation.

零度℉ 2024-08-30 08:31:31
/^-*\d*\.\d+,[\b]*-*\d*\.\d+$/
/^-*\d*\.\d+,[\b]*-*\d*\.\d+$/
烟花肆意 2024-08-30 08:31:31

正则表达式方法无法真正验证经度和纬度是否有效,但这里的方法比已经发布的其他方法更精确:

/^\s*-?\d{1,3}\.\d+,\s*\d{1,3}\.\d+\s*$/

这将拒绝其他解决方案允许的某些字符串,例如

-1-23-1-,210-
--123.1234,123.1234

但它仍然允许无效值像这样:

361.1234, 123.1234

如果您需要认真的验证,您最好的选择是创建一个类来存储和验证这些坐标。

The regex approach can't really validate that longitude and latitude are valid, but here's one that would be more precise than the others posted already:

/^\s*-?\d{1,3}\.\d+,\s*\d{1,3}\.\d+\s*$/

This would reject some strings that others' solutions would allow, such as

-1-23-1-,210-
--123.1234,123.1234

But it would still allow invalid values like this:

361.1234, 123.1234

Your best bet -- if you need serious validation -- is to create a class to store and validate these coordinates.

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