MySQL query : search keyword like %

I was trying to query a database table by search keyword. My SQL is as follow:

SELECT * FROM some_table WHERE some_name LIKE '%$keyword%'

where $keyword is from PHP form POST data. The $keyword is already proces开发者_JAVA技巧sed by real_escape_string function. I notice that it the $keyword is %, all records are selected. How can I search for the some_name field with % in the content?

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You have to escape the literal %, as explained in the manual:

SELECT * FROM some_table WHERE some_name LIKE '%\%%';

EDIT: Also note that you should escape the _ character the same way, as that's symbol for a single-character wild card.

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You should escape % with \% in keyword