preg_replace文本中的链接与< a>有一些例外 [英] preg_replace links in text with <a> with some exception

问题描述

<?php
// I have a string, something like this:
$string = '
    Lorep ipsum <a href="http://www.example.com">example</a> lorem ipsum
    lorem ipsum http://www.example.com/index.php?param1=val&param2=val lorem ipsum
';
// I need to do some magick with preg_replace and get string like this:
$string = '
    Lorep ipsum <a href="http://www.example.com" target="_blank">example</a> lorem ipsum
    lorem ipsum <a href="http://www.example.com/index.php?param1=val&param2=val" target="_blank">http://www.example.com/index.php?param1=val&param2=val</a> lorem ipsum
';

?>

所以基本上，我想链接文本中未包含在< a>< / A>并将target =_ blank添加到那些。

So basicly, I want to linkify URLs in text that are not wrapped in <a></a> and add target="_blank" to those that are.

任何人都可以帮我这个吗？

Can anyone help me with this?

推荐答案

$string = preg_replace("/<a(.*?)>/", "<a$1 target=\"_blank\">", $string);

这将增加一个额外的 target = \_blank \如果已经设置了。

this will add an extra target=\"_blank\" incase it is already set.

$string = preg_replace("/<a (href=".*?").*?>/", "<a $1 target="_blank">", $string);

这将确保只有一个 target =_ blank

示例： - http://www.phpliveregex.com/p/6qG

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