php - php max_execution 时间限制

Question

过去几天我一直在尝试解决一个问题。我有一个可以抓取新闻的网站，效果非常好。然而最近，我的分析器脚本遇到了问题，因为它似乎超出了我的网络主机设置的时间限制。显然，最大执行时间约为 1 分钟，而我的脚本花费的时间比这长得多。而且我无法在 php.ini 脚本中调整它，因为我将我的网站托管在公共(public)服务器上。我能做些什么？我需要重写我的脚本吗？

感谢您的帮助!我的脚本如下:

<?php
    $array = array();
    $sub_array = array();
    $analyzer_ids = array();

$res5 = mysqli_query($con,"SELECT id,status FROM statuz ORDER BY id DESC LIMIT 1");
$row5 = mysqli_fetch_array($res5);

$status = $row5['status'];
$status_id = $row5['id'];

if($status == 2) {

    $res1 = mysqli_query($con,"SELECT tag, id FROM tags");
    while($row1 = mysqli_fetch_array($res1)) {
        $tag = $row1['tag'];
        $id = $row1['id'];

        $res2 = mysqli_query($con,"SELECT sub_tag FROM sub_tags WHERE tag_id = '$id'");
        while($row2 = mysqli_fetch_array($res2)) {
            $sub_tag = $row2['sub_tag'];
            $sub_tag = strtolower($sub_tag);
            $sub_array[] = $sub_tag;
        }

        $array[] = array('tag_id' => $id, 'tag' => $tag, 'sub_tag' => $sub_array);
        $sub_array = array();
    }

    mysqli_query($con,"INSERT INTO analyzer_queue (crawler_id, status)
    (SELECT id,0 FROM crawlers)");

    $initial_res = mysqli_query($con,"SELECT crawler_id,id FROM analyzer_queue WHERE status = '0'");
    while($initial_row = mysqli_fetch_array($initial_res)) {

        $analyzer_id = $initial_row['id'];
        $start_crawler_id = $initial_row['crawler_id'];
        mysqli_query($con,"UPDATE analyzer_queue SET status = '1' WHERE crawler_id = '$start_crawler_id' ORDER BY id DESC LIMIT 1");
        $analyzer_ids[] = $analyzer_id;

                $res = mysqli_query($con,"SELECT cr.title, cr.content, cr.id
                FROM crawler_results cr
                INNER JOIN crawlers c
                ON c.newspaper_id = cr.newspaper_id
                WHERE c.id = '$start_crawler_id'
                AND status = '3'
                LIMIT 10");
                while($row = mysqli_fetch_array($res)) {

                    $article_id = $row['id'];
                    $title = $row['title'];
                    $content = $row['content'];

                    $content = strip_tags($content);
                    $content = strtolower($content);
                    $title = strtolower($title);


                    $count = array();
                    foreach ($array as $tag) {
                        $regex = '/(?:\b' . preg_quote($tag['tag'], '/');
                        foreach ($tag['sub_tag'] as $sub) {
                            $regex .= '\b)|(?:\b' . preg_quote($sub, '/');
                        }
                        $regex .= '\b)/i';
                        $count_content = preg_match_all($regex, $content, $count_content);
                        $count_title = preg_match_all($regex, $title, $count_title);
                        $count_total[$tag['tag']] = $count_content + $count_title;
                        $total_count = $count_total[$tag['tag']];

                        $tag_name = $tag['tag'];

                        $res5 = mysqli_query($con,"SELECT id FROM tags WHERE tag = '$tag_name'");
                        $row5 = mysqli_fetch_array($res5);

                        $tag_id = $row5['id'];


                        if($total_count != 0) {
                            mysqli_query($con,"INSERT INTO article_tags (article_id,tag_id,count_tags) VALUES('$article_id','$tag_id','$total_count')");
                        }

                        echo$count_total[$tag['tag']];
                        echo"<br /><br />";
                    }

                    echo"<pre>";
                    print_r($count_total);
                    echo"</pre>";

                    mysqli_query($con,"UPDATE crawler_results SET status = '2', analyzer_id = '$analyzer_id' WHERE id = '$article_id'");
                }
                mysqli_query($con,"UPDATE analyzer_queue SET status = '2' WHERE crawler_id = '$start_crawler_id' ORDER BY id DESC LIMIT 1");

        }
        mysqli_query($con,"UPDATE crawler_results SET status = '4' WHERE analyzer_id NOT IN (".implode(',',$analyzer_ids).")");
        mysqli_query($con,"UPDATE statuz SET status = '3' WHERE id = '$status_id'");
        print_r($analyzer_ids);

} else {
    echo"Not ready yet";
}




?>

Answer 1

您可以在脚本顶部使用 ini_set，如下所示:

ini_set('max_execution_time' , 300 );

上述调用会将脚本的最大执行时间设置为五分钟。这是文档页面:

http://php.net/manual/en/function.ini-set.php

如果您的主机允许，您还可以考虑通过 cron 或其他一些调度守护进程运行此脚本。在 cli 上下文中运行的 PHP 脚本通常没有执行时间限制，或者执行时间更长。