PHP preg pattern needed

Question

0 10 2 012 11 12 12 test -f 13 x   xx
0 2   102 012 12 12 test -f 11 xxddd 22x
0 102 01 2  1    12   12 test -f 12 xxx

I need to find the number (between 1 and 5 digits) following the -f parameter using preg_match().

I'm a total bumpkin regarding PCRE matches.

I played arround with online preg testers and get stuck with \(.*)-f(\d{1,5})(.*)$\

Daniel W. · Accepted Answer · 2014-07-01 13:57:27Z

1

Oh I didnt notice how close I got it:

\^.* -f (\d{1,4}).*$\

Array
(
    [0] =>     0 10 2 012 11 12 12 test -f 13 x   xx
    [1] => 13
)

answered Jul 1, 2014 at 13:57

Daniel W.

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6 Comments

Gerald Schneider Over a year ago

actually you only need -f\s+(\d+)\s

Daniel W. Over a year ago

@GeraldSchneider I'm going to accept any working pattern posted by anyone if you feel free to answer yours...

Matt Cremeens Over a year ago

I agree he doesn't need ^.*, but your \d+ will provide 1 or more digits, a number which could exceed 5 (he wants only digits up to 5).

Gerald Schneider Over a year ago

usually when you parse a parameter you want the complete value until the next whitespace. reducing this to 5 just because you only have values with that length at the moment seems short sighted.

Matt Cremeens Over a year ago

I agree, but I got the impression a string of numbers might follow the -f and he only wanted the first 5. Maybe I misunderstood the original question.

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