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                ``` //分批次處理數據 public function test(){ for ($i=1; $i<=10; $i++){ $userList[] = [ 'name' => "姓名{$i}", 'age' => '年齡'.($i+18), ]; } $this->exec($userList, 3); } /** * 分批次處理 * @param $userList 待處理的數據 * @param int $batchNums 每次處理的條數 */ public function exec($userList, $batchNums = 2){ $count = count($userList); $page = ceil($count/$batchNums); //注意這里不能改成 ($i = 1; $i<=$page; $i++),因為array_slice起始位置和index是有聯系的 for($i = 0; $i<$page; $i++){ $index = $i * $batchNums; $newData = array_slice($userList, $index, $batchNums); $this->limitExec($newData); } } //處理list數據 public function limitExec($list){ var_export($list); } ``` 假設每次循環獲取5條數據 ``` //方法一:(數據量大的后面查詢速度會變慢 limit 10000,5) $flag = true; $limit = 0; while($flag){ $sql = "select id,name from table limit {$limit} , 5"; $data = $db->select($sql); //todo 你的邏輯 if(!$data){//數據為空,直接停止循環 $flag = false; break; } $limit += 5;//每次獲取后面5條,直至數據查詢為空. } //方法二: $id = 0; $limit= 5; while(true){ $sql = "select id,name from table where id > {$id} limit {$limit}"; $data = $db->select($sql); if(!$data){ break; } //todo 你的邏輯 if(count($data)<$limit){ break; } $id = $data[$limit-1]['id'];//獲取最后一次查詢的Id用于下次對比 } ``` ``` $start = 0; while($data = select * from table limit $start, 100) { print_r($chunk); $start += 100; } ```
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