检查PHP中的“@”字符后面的单词 [英] Check the word after a '@' character in PHP

问题描述

我现在正在制作新闻和评论系统，但我暂时停留在一部分。我希望用户能够以 @用户名的推特风格引用其他玩家。脚本看起来像这样：（不是真正的PHP，只是想象脚本; 3）

I'm making a news and comment system at the moment, but I'm stuck at one part for a while now. I want users to be able to refer to other players on the twitter style like @username. The script will look something like this: (not real PHP, just imagination scripting ;3)

$string = "I loved the article, @SantaClaus, thanks for writing!";
if($string contains @){ 
    $word = word after @;
    $check = is word in database? ...
}

而对于字符串中的所有@用户名，与while（）。

And that for all the @username's in the string, perhaps done with a while(). I'm stuck, please help.

推荐答案

这是正则表达式的位置。

<?php
    $string = "I loved the article, @SantaClaus! And I agree, @Jesus!";
    if (preg_match_all('/(?<!\w)@(\w+)/', $string, $matches))
    {
        $users = $matches[1];
        // $users should now contain array: ['SantaClaus', 'Jesus']
        foreach ($users as $user)
        {
            // check $user in database
        }
    }
?>

1. /

regular-expressions.info 似乎是一个受欢迎的教程选择，但有很多人在网上。

regular-expressions.info seems to be a popular choice of tutorial, but there are plenty of others online.

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