我如何在PHP中创建用户定义的函数？ [关闭]

How can I create a function as cms_database_select() which works as mysql_select_db() ?

Pass in the parameters as required in protocol.

function cms_database_select(){
    mysql_select_db();
}

function cms_select_db($dbname, $link) {
    return mysql_select_db($dbname, $link);
}


Why?

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function cms_database_select(){
   return call_user_func_array("mysql_select_db", func_get_args());
}