CODEWITHSUNDEEP
phpregexpreg-match
motioz
motioz

Reputation: 662

php: how to find numbers in string?

I have some strings like:

some words 1-25 to some words 26-50
more words 1-10
words text and words 30-100

how can I find and get from string all of the "1-25" and the "26-50" and more

Upvotes: 2

Views: 8408

Answers (3)

Danish Iqbal
Danish Iqbal

Reputation: 1464

I think this line is enough

preg_replace("/[^0-9]/","",$string);

Upvotes: 0

spencercw
spencercw

Reputation: 3358

You can do this with regular expressions:

echo preg_match_all('/([0-9]+)-([0-9]+)/', 'some words 1-25 to some words 26-50 more words 1-10 words text and words 30-100', $matches);
4
print_r($matches);
Array
(
    [0] => Array
        (
            [0] => 1-25
            [1] => 26-50
            [2] => 1-10
            [3] => 30-100
        )

    [1] => Array
        (
            [0] => 1
            [1] => 26
            [2] => 1
            [3] => 30
        )

    [2] => Array
        (
            [0] => 25
            [1] => 50
            [2] => 10
            [3] => 100
        )

)

For each range the first value is in array[1] and the second is in array[2] at the same index.

Upvotes: 3

Konrad Rudolph
Konrad Rudolph

Reputation: 546183

If it’s integers, match multiple digits: \d+. To match the whole range expression: (\d+)-(\d+).

Maybe you also want to allow whitespace between the dash and the numbers:

(\d+)\s*-\s*(\d+)

And maybe you want to make sure that the expression stands free, i.e. isn’t part of a word:

\b(\d+)\s*-\s*(\d+)\b

\b is a zero-width match and tests for word boundaries. This expression forbids things like “Some1 -2text” but allows “Some 1-2 text”.

Upvotes: 5

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