Php traverses a string and adds % before each word

Php traverses a string and adds % before each word, for example, $ str & nbsp; test text. I want to get & nbsp; % Test % text % words % share to: php traverses a string, add % before each word
Example: $ str = "test text ";

I want to get % Test % text % words %

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$ Str = "test text ";
Echo join ('%', preg_split ('// U', $ str ));

% Test % text % words %

If it is not UTF-8, complete the encoding conversion by yourself.
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Then you are gbk encoded.
$ S = 'Test text ';
Echo '%'. join ('%', str_split ($ s, 2). '%'; // %