Question

可能重复：
How do I auto convert an url into a hyper link in PHP?

让我们说，我的网站上有一个文本字段，用户可以输入他想要的任何内容。如果用户输入了网址，我想在后台为此网址添加代码。因此我需要逻辑来识别网址。

实施例用户输入文本：

Please visit me at my website: http://www.mywebsite.org

我想将后台的代码更改为：

Please visit me at my website: <a href="http://www.companywebsite.com/redirect.php?http://www.mywebsite.org">http://www.mywebsite.org</a>

如何在提交文本后更改该链接？

Answer 1

<?php

// The Regular Expression filter
$reg_exUrl = "/(http|https|ftp|ftps)\:\/\/[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?/";

// The Text you want to filter for urls
$text = "The text you want to filter goes here. http://google.com";

// Check if there is a url in the text
if(preg_match($reg_exUrl, $text, $url)) {

       // make the urls hyper links
       echo preg_replace($reg_exUrl, "<a href="{$url[0]}">{$url[0]}</a> ", $text);

} else {

       // if no urls in the text just return the text
       echo $text;

}
?>

Answer 2

是肯定的。只需使用正则表达式。见preg_replace

Answer 3

如果您正在保存用户输入并在网站上显示（正如我猜的那样），您应该保存原始输入并在渲染时应用逻辑。

请参阅此处了解逻辑： Detect URL and add achor-tags around it

$link = preg_replace("/(http:\/\/[^\s]+)/", "<a href=\"$1\">$1</a>", $link);

Answer 4

哟也可以试试

$text = "Please visit me at my website: http://www.mywebsite.org
Please visit me at my website: http://www.mywebsite.org";
$newText    =   preg_replace('/((http|https|ftp):\/\/[^\s]+)/i',
'<a href="$1" class="link1" target="_blank">$1</a>', $text);
echo $newText;

这一个

HTML5 / PHP：如何识别键入的URL

4 个答案: