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我有一個函數,首先檢查,看看一行存在,如果它不插入數據。如果有任何失敗,它應該返回false。當我運行該函數並檢查返回與var_dump,它返回true。我假設數據被插入到數據庫中,但事實並非如此。爲什麼會這樣做?我的功能有問題嗎?插入到返回True,但沒有插入數據
function add_tier ($mysqli, $project_id, $tier_number, $wanted, $in_return, $limit) {
if ($result = $mysqli->query("SELECT COUNT(tier_id) FROM `tier` WHERE `project_id`
= $project_id AND `tier_number` = $tier_number")){
if ($return < 1) {
if ($stmt = $mysqli->prepare("INSERT INTO `tier` (`project_id`,
`tier_number`, `wanted`, `in_return`, `limit`) VALUES (?, ?, ?, ?, ?)")){
$stmt->bind_param('iissi', $project_id, $tier_number, $wanted, $in_return,
$limit);
$return = $stmt->execute();
$stmt->close();
return $return;
} else {return false;}
} else {return false;}
} else {return false;}
}
是在這兩個領域的唯一關鍵,還是有兩個鍵,一個在每個? –
'tier_id'是唯一的唯一鍵。這也是主要關鍵。 – jason328
它是'auto_increment'嗎? –