I need a regex to detect and match some values like that:
JavaScript
x
Lorem ipsum 1,2,3Lorem ipsum 1,2,3,Lorem ipsum 1, 2, 3Lorem ipsum 1 2 3Lorem 12 ipsum 1 2 3Lorem ipsum 12,13,14Lorem ipsum 1,12,15Lorem ipsum 1/12/15and so onbut values like following, are not allowed:
JavaScript
Lorem ipsumLorem ipsum 1Lorem ipsum 2Lorem ipsum 12Lorem 12 ipsum 12Lorem ipsum 1,2,3 and moreOne more requirement I have, that i need to use it with PHP preg_match and extract all mathces into variable
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Answer
Regex can get tough, but, if i’ve understood your use case correctly, this should work:
(?=d+[ ,/])([d,/s]{2,})$
As shown in this example
Breakdown:
(?=d+[ ,/])positive lookahead asserting that what comes after must include at least one number and one of a space, comma, or slash([d,/s]{2,})capture group asserting a match of at least 2 of number space, comma, or slash$asserts the end of the string
NOTE:
if you want to allow multiple spaces, tabs, new lines etc, change (?=d+[ ,/]) to (?=d+[s,/])
As for getting and working with the matches, something like this should work as shown in this example:
JavaScript
<?php$re = '/(?=d+[ ,/])([d,/s]{2,})$/';$str = 'Lorem ipsum 1,2,3Lorem ipsum 1,2,3,Lorem ipsum 1, 2, 3Lorem ipsum 1 2 3Lorem 12 ipsum 1 2 3Lorem ipsum 12,13,14Lorem ipsum 1,12,15Lorem ipsum 1/12/15Lorem ipsumLorem ipsum 1Lorem ipsum 2Lorem ipsum 12Lorem 12 ipsum 12Lorem ipsum 1,2,3 and more';// just getting an arry so we can loop over them easily$values = array_filter(array_map('trim', explode("n", $str)));foreach($values as $value) { echo "'$value'"; preg_match($re, trim($value), $matches); if (isset($matches[0])) { echo " matches...n"; $output = preg_split( "/[ ,/]/", $matches[0]); $output = array_map('trim', $output); $output = array_filter($output); var_dump($output); } else { echo " doesn't match..."; } echo "n"; echo "n";}Which produces this output:
‘Lorem ipsum 1,2,3’ matches…
JavaScript
array(3) { [0]=> string(1) "1" [1]=> string(1) "2" [2]=> string(1) "3"}'Lorem ipsum 1,2,3,' matchesarray(3) { [0]=> string(1) "1" [1]=> string(1) "2" [2]=> string(1) "3"}'Lorem ipsum 1, 2, 3' matchesarray(3) { [0]=> string(1) "1" [2]=> string(1) "2" [4]=> string(1) "3"}'Lorem ipsum 1 2 3' matchesarray(3) { [0]=> string(1) "1" [1]=> string(1) "2" [2]=> string(1) "3"}'Lorem 12 ipsum 1 2 3' matchesarray(3) { [0]=> string(1) "1" [1]=> string(1) "2" [2]=> string(1) "3"}'Lorem ipsum 12,13,14' matchesarray(3) { [0]=> string(2) "12" [1]=> string(2) "13" [2]=> string(2) "14"}'Lorem ipsum 1,12,15' matchesarray(3) { [0]=> string(1) "1" [1]=> string(2) "12" [2]=> string(2) "15"}'Lorem ipsum 1/12/15' matchesarray(3) { [0]=> string(1) "1" [1]=> string(2) "12" [2]=> string(2) "15"}'Lorem ipsum' doesn't match...'Lorem ipsum 1' doesn't match...'Lorem ipsum 2' doesn't match...'Lorem ipsum 12' doesn't match...'Lorem 12 ipsum 12' doesn't match...'Lorem ipsum 1,2,3 and more' doesn't match...