PHP?? ???? ??? MySQL ?? ??: ?? ??
PHP? ???? MySQL ???????? ???? ??? ? ??? ?? ??? ??? ? ????. ?? ??? ???? ???? ????? ?????. ??? ??? ?? ??? PHP? ??? ?? ???? ?????.
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// Query the database and retrieve the user's ID
$result = $mysqli->query("SELECT userid FROM DB WHERE name='john'");
??? ??? ??? ID? ????? ????? ?????. ???????? ?? ??? ??? ?? ?? ??? ????? ??? ? ????.
$row = $result->fetch_assoc(); $id = $row['userid'];
??? ??? ?? ?? gettype($id)? ???? $id ??? ??? ??? ???? "???"? ????? ??? ?? ????.
? ?? ?? ??????
??? ??? PHP? MySQL ???????? ??? ???? ???? ??? ????. ????? PHP? ??????? ?? ??? ??? ???? ??? ?? ???? ???? ?????. ??? ?? ???? ??? ??? ???? PHP ??????? ??? ? ?????.
?? ??
?? ?? ??? ???? ????? ??? ?? ??? ? ????. ??? ?? ??? ????:
- ??? ?? ??: ?? (int) ??? ?? intval() ??:
$id = (int) $row['userid']; // Equivalent to intval($row['userid'])
- ??? ?? ??: ???? MySQL? AS ?? ???? ??? ??? ????? ?????. ??? ??:
$result = $mysqli->query("SELECT userid AS INT FROM DB WHERE name='john'");
?? ??? ? ??? ???? ??? ???? MySQL ???????? ??? ?? ??? PHP ?????? ??? ??? ???? ????? ??? ? ????.
? ??? MySQL ?? ??? PHP?? ???? ???? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!
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PHP?? ?? ? ??? ????? ?????????
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php (, -, *, /, %)?? ?? ??? ??? ??????
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?? PHP ?? ? ?? ??? ??? ?? ??? ??????
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