......中的未知修饰符'/'？ 它是什么？ [重复]

Question

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• Warning: preg_replace(): Unknown modifier ']' 3 answers

When i wrote the following, i get such warning, and it doesn't match anything, but i'm sure, that $row_search['content'] contains $value...

preg_match_all("/[^\s]*".preg_quote($value)."[^\s]*/iu", $row_search['content'], $final_matched);

WARNING:preg_match_all() [function.preg-match-all]: Unknown modifier '/' in C:\xampp\htdocs\finance\search\search.php on line 82

why i get such warning message?

Thanks

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Answer 1

I assume $value contains a slash /, which is not escaped by preg_quote:

The special regular expression characters are: . \ + * ? [ ^ ] $ ( ) { } = ! < > | : -

Pass the delimiter you use to the function:

preg_match_all("/[^\s]*".preg_quote($value, '/')."[^\s]*/iu", $row_search['content'], $final_matched);
//                                        ---^

or use another delimiter.