CODEWITHSUNDEEP
phppreg-match
James
James

Reputation: 10412

PHP preg_match range

I want to use preg_match to match numbers 1 - 21. How can I do this using preg_match? If the number is greater than 21 I don't want to match anything. 

example preg_match('([0-9][0-1]{0,2})', 'Johnathan 21');

Upvotes: 3

Views: 7122

Answers (3)

guanchifly
guanchifly

Reputation: 1

You could stablish an incremental filter like this example for TCP ports (altougth includes port number 0), like the previous answer:

preg_match('/^([0-9]{1,4}|[1-5][0-9]{4}|6[0-4][0-9]{3}|65[0-4][0-9]{2}|655[0-2][0-9]|6553[0-5])$/', '62000');

Upvotes: 0

user1233508
user1233508

Reputation:

Copied from comment above:

I suggest matching simply ([0-9]{1,2}) (maybe wrapped in \b, based on input format) and filtering the numeric value later, in PHP code.

See also Raymond Chen's thoughts on the subject.

Upvotes: 3

hakre
hakre

Reputation: 197659

Literally:

preg_match('~ (1|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|19|20|21)$~', 'Johnathan 21');

But maybe this is more nifty:

preg_match('~ ([1-9]|1[0-9]|2[01])$~', 'Johnathan 21');

Upvotes: 3

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