1小时后执行查询

Question

附表格样本。

我希望每小时都能将最新的项目添加到我的表格中。该表格是从其他来源填充​​的，我需要跟踪我收到的最后一个ID是什么，并从那时起添加所有新项目。

$check5 = "select * from media_ids";
$rs5 = mysqli_query($con,$check5);
if(mysqli_num_rows($rs5)==1)
{
$row = mysqli_fetch_assoc($rs5);
$media_id=$row['media_id'];
}

// execute query

Answer 1

1. 您需要创建一个每小时运行一次的cronjob。

crontab -e然后添加0 * * * * php /path/to/script/script.php

1. 在名为created的表格中添加一列，将类型设置为TIMESTAMP，将默认值设置为CURRENT_TIMESTAMP

3A。 - 在最后一小时内获取所有内容 script.php应如下所示：

<?php

$current = time() - 3600;
$currentMediaQuery = "select media_id from media_ids where created > {$current}"
$mediaQuery = mysqli_query($con, $currentMediaQuery);

if (mysqli_num_rows($mediaQuery) > 0) {
    while ($row = mysqli_fetch_row($mediaQuery)) {
         ... do stuff
    }
}

3B。获取10，按指令维护指针

<?php

$lastPointer = “select pointer from pointer_tracking”;
$lastPointerResult = mysqli_query($con, $lastPointer);
$lastPointer = mysqli_fetch_row($lastPointerResult)
$lastPointer = $lastPointer[0];

$currentMediaQuery = “select * from media_ids where id > {$lastPointer} limit {$lastPointer}, {$lastPointer +10}”;

$mediaQuery = mysqli_query($con, $currentMediaQuery);

if (mysqli_num_rows($mediaQuery) > 0) {
    while ($row = mysqli_fetch_row($mediaQuery)) {
        do stuff…
    }
}

if (($lastPointer + 10 > 40) {
    $lastPointer = 1;
} else {
    $lastPointer += 10;
}

mysqli_query($con, “update pointer_tracking set pointer = {$lastPointer}”);

你需要创建一个名为pointer_tracker的表，它有一个id和pointer列，两个整数类型