I need to parse a string and get the numbers between 2 delimiters. I need to be sure they're numbers. I tried something like this but doesn't work as expected.
if (preg_match_all("/[^0-9](?<=First)(.*?)(?=Second)/s", $haystack, $result))
for ($i = 1; count($result) > $i; $i++) {
print_r($result[$i]);
}
What's wrong with the regex?
分享 Huh, that's almost the one I supplied to your other question xD
Change the (.*?) to ([0-9]+)
if (preg_match_all("/(?<=First)([0-9]+)(?=Second)/s", $haystack, $result))
for ($i = 1; count($result) > $i; $i++) {
print_r($result[$i]);
}
.*? will match any character (except newlines) and to match only numbers in between your delimiters "First" and "Second", you will need to change it to [0-9]. Then, I assume that there can't be nothing in between them, so we use a + instead of a *.
I'm not sure why you used [^0-9] in the beginning. Usually [^0-9] means one character which is not a number, and putting it there doesn't really do something useful, at least in my opinion.
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