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phpregexpreg-match

preg_match if string contain + or -

How to validate if a string contain either + or - ??

preg_match('[\-\+]', '(292+3)*1', $match);
print_r($match);

preg_match('[\-\+]', '(292-3)*1', $match);
print_r($match);

output

Array
(
)
Array
(
)
Solution

  • Regex must be between delimiters:

    preg_match('/[-+]/', '(292+3)*1', $match);