Space that cannot be removed by trim (), chr (161 ). When a user submits an article, it always appears.

Space that cannot be removed by trim (), chr (161 ). A user submits an article. Before the content of the string submitted by POST is written to the database, trim removes the leading and trailing spaces of each row. However, some paragraphs that are submitted to the database still have a short space before them. It cannot be removed. It is neither \ s nor \ n \ r \ 0. use the ord () function to query spaces whose value is equal to trim () and chr (161 ). A user submits an article.
Before the content of the string submitted by POST is written to the database, trim removes the leading and trailing spaces of each row. YesThe content submitted for writing to the database is still a small space before some paragraphs. It cannot be removed. It is neither \ s nor \ n \ r \ 0. Ord ()The value of the function query is equal to 161, but how to remove the null at the beginning.

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Trim ($ s, "\ r \ n". chr (161 ))