微博开拓之@替代

在微博开拓中，对付@的替代，许多人性德想到的是正则吧，正则除了服从题目，尚有误替代，举个例子：

@ponyma也许被理会成了"@pony"+"ma"

不多说，直接上代码：

$users['pony']      = '马化腾';
$users['ponyma']    = '坡泥马';
$users['ponyli']    = '坡泥李';
$text = "@pony:出格声明,@ponyli@ponyma@ponywong@ponylao什么的都不是我";
preg_match_all('/@\w+/', $text, $matches);
if(is_array($matches[0]) && !empty($matches[0])){
    $replaces       = array_combine($matches[0], $matches[0]);
}
foreach($users as $userid=>$username){
    $replaces['@'.$userid]  = "<a href='http://t.qq.com/{$userid}'>{$username}</a>";
}
$html               = strtr($text, $replaces);
echo $html;

功效：

<a href=’http://t.qq.com/pony’>马化腾</a>:出格声明,<a href=’http://t.qq.com/ponyli’>坡泥李</a><a href=’http://t.qq.com/ponyma’>坡泥马</a>@ponywong@ponylao什么的都不是我