Find numeric value in string?

[MrCat]

Is there an easy way to find a numeric value in a string if I don't know what the string will contain?

For example I want '52' out of: mystring52

 

Hopefully there is already a simple function to do this? I'm thinking there may not be as the string having more than one group of numbers may confuse matters. I'm just dealing with abcdef123 or similar in this case though.

 

 

[Buddski]

You could use a regular expression.

I am horrible when it comes to regex but this at least works

$str = 'abc343def123';
preg_match_all('/[^a-zA-Z]{1,}/',$str,$matches);
echo '<pre>' , print_r($matches,true) , '</pre>'

/* Results in 
Array
(
    [0] => Array
        (
            [0] => 343
            [1] => 123
        )

)*/

 

Edit: even better

preg_match_all('/\d{1,}/',$str,$matches);

[MrCat]

Thanks for that.

It would be nice if something like intval just worked. I always worry about time/processing penalties when using something unnecessarily complicated like preg_match!

 

[ManiacDan]

It would be nice if something like intval just worked

intval does work.  If you give it "potato123" intval says "that's not a number, so let's say zero." 

 

What happens if your string is "ab12cd34."  Do you want the number 1,234 or do you want two numbers?

[MrCat]

Yeah I know what you mean.

 

What I'm wanting to do is pass a 'get' variable like ?page=thisone26

I can always do ?page=thisone&value=26 or something like ?page=thisone.26 and look for the separator.

 

Just thought my original layout was the nicest but it's looking like it's not worth the trouble!

 

[xyph]

why not use a separator and explode?

[requinix]

"thisone26" is just in that form to look pretty I take it. There are two actual pieces of data, but because one is letters and the other is numbers you can combine them unambiguously.

 

Get the best of both worlds by using URL rewriting. You could use /page/thisone26 and

RewriteRule ^page/(\D+)(\d+)$ index.php?page=$1&value=$2 [L]