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Editorial Team
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Asked: 2026-05-24T16:45:38+00:00

I’m letting users enter GPS values through a form, they all have the same

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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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1 Answer

  1. Editorial Team

    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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