PHP Regular Expression replacement <> and intermediate content failed

{Code...} indicates the content to be processed. Use the statement preg_replace (& #039; & amp; lt ;.*? & Amp; gt; & #039;, & #039; & #039;, $ content); why cannot & amp; lt; & amp; gt; and delete intermediate content?

2015 student list announcement for final transfer to major on September

The above is the content to be processed. Use the statementPreg_replace ('/<. *?> /', '', $ Content );Why can't I<>And delete intermediate content?

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2015 student list announcement for final transfer to major on September

The above is the content to be processed. Use the statementPreg_replace ('/<. *?> /', '', $ Content );Why can't I<>And delete intermediate content?

I found it myself. It seems that there is a line break. \ n cannot be matched. I first use \ s + to remove the blank space, and then use the above statement.