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regular expression question in php preg_match

Posted on 2008-06-16
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Last Modified: 2012-05-05
i'd like to check the following

okay:
'-'
'-1'
'-1212'
'-12.22'

not okay:
'- '
'#'
'-1/1'
'-1,2'
'-1.2.2.2'
'1,2'
'1/1'
'1.2.2'

Thanks
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Question by:edyonline
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Roonaan earned 500 total points
ID: 21796047
if(preg_match('/^\-\d+(\.\d+)?$/', $value)) {
  //valid
} else {
  //invalid
}
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