Question

无论如何在PHP中将纯文本URL转换为HTML超链接？我需要转换以下类型的网址：

http://example.com
http://example.org
http://example.gov/
http://example.com?q=sometext&opt=thisandthat
http://example.com#path
http://example.com?q=querypath#path
http://example.com/somepath/index.html

https://example.com/
https://example.org/
https://example.gov/
https://example.com?q=sometext&opt=thisandthat
https://example.com#path
https://example.com?q=querypath#path
https://example.com/somepath/index.html

http://www.example.com/
http://www.example.org/
http://www.example.gov/
http://www.example.com?q=sometext&opt=thisandthat
http://www.example.com#path
http://www.example.com?q=querypath#path
http://www.example.com/somepath/index.html

https://www.example.com/
https://www.example.org/
https://www.example.gov/
https://www.example.com?q=sometext&opt=thisandthat
https://www.example.com#path
https://www.example.com?q=querypath#path
https://www.example.com/somepath/index.html

www.example.com/
www.example.org/
www.example.gov/
www.example.com?q=sometext&opt=thisandthat
www.example.com/#path
www.example.com?q=querypath#path
www.example.com/somepath/index.html

example.com/
example.org/
example.gov/
example.com?q=sometext&opt=thisandthat
example.com/#path
example.com?q=querypath#path
example.com/somepath/index.html

Answer 1

如何通过正则表达式运行它们，如下面用于重新激活Twitter链接 -

http://www.burnmind.com/howto/how-to-convert-twitter-mentions-and-urls-to-active-links-using-regular-expressions-in-php

Answer 2

如果您只需转换单个网址，则非常简单：

function makeLink($url)
{
    return '<a href="' . htmlspecialchars($url) . '">' . htmlspecialchars($url) . '</a>';
}

对于出现在较大文本块中的网址，例如用户评论，请看这个问题：

Replace URLs in text with HTML links

Answer 3

试试这个功能。如果文本以http或www开头，这将生成链接。 example.com无法使用。

function linkable($text = ''){
    $text = preg_replace("/\s+/", ' ', str_replace(array("\r\n", "\r", "\n"), ' ', $text));
    $data = '';
    foreach( explode(' ', $text) as $str){
        if (preg_match('#^http?#i', trim($str)) || preg_match('#^www.?#i', trim($str))) {
            $data .= '<a href="'.$str.'">'.$str.'</a> ';
        } else {`enter code here`
            $data .= $str .' ';
        }
    }
    return trim($data);
}

Answer 4

呃，把它们包裹在锚标签中？

function linkify($url) {
  return '<a href="' . $url . '">' . $url . '</a>';
}

Answer 5

这是我用来在我做的小论坛上做同样的事情。通常我会像echo makeLinks($forumpost['comment']);

一样通过它运行整个评论

function makeLinks($str) {    
    return preg_replace('/(https?):\/\/([A-Za-z0-9\._\-\/\?=&;%,]+)/i', '<a href="$1://$2" target="_blank">$1://$2</a>', $str);
}

Answer 6

这是我的操作方式（包括测试用例）：

/**
 * @see Inspired by https://css-tricks.com/snippets/php/find-urls-in-text-make-links/ and Example 1 of http://php.net/manual/en/function.preg-replace-callback.php
 * 
 * @param string $text
 * @return string
 */
public static function getTextWithLinksEnabled($text) {
    $regex = "/(http|https|ftp|ftps)\:\/\/[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?/";
    return preg_replace_callback($regex, function ($matches) {
        $fullMatch = $matches[0];
        return "<a href='" . $fullMatch . "'>" . $fullMatch . "</a>";
    }, $text);
}

测试：

public function testGetTextWithLinksEnabled() {
    $this->assertEquals('a@b.com', StrT::getTextWithLinksEnabled('a@b.com'));//no links
    $this->assertEquals('just plain text', StrT::getTextWithLinksEnabled('just plain text'));//no links
    $this->assertEquals("here is a link <a href='https://stackoverflow.com/'>https://stackoverflow.com/</a> right here", StrT::getTextWithLinksEnabled('here is a link https://stackoverflow.com/ right here'));//one link
    $this->assertEquals("here is a link <a href='https://stackoverflow.com/'>https://stackoverflow.com/</a> right here and another: <a href='https://css-tricks.com/snippets/php/find-urls-in-text-make-links/'>https://css-tricks.com/snippets/php/find-urls-in-text-make-links/</a>", StrT::getTextWithLinksEnabled('here is a link https://stackoverflow.com/ right here and another: https://css-tricks.com/snippets/php/find-urls-in-text-make-links/'));//2 links
}

Answer 7

万一最终用户不包含“ http：//”或“ https：//”（在我的情况下，将链接复制到表单中）。根据我上方的瑞安代码：

function makeLink($text) {
    $regex = "/(http|https|ftp|ftps)\:\/\/[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?/";
    return preg_replace_callback($regex, function ($matches) {
        $fullMatch = $matches[0];
        // $fullMatch = startsWith($fullMatch, 'http') ? $fullMatch : 'http://'.$fullMatch;
        return "<a href='" . $fullMatch . "'>" . $fullMatch . "</a>";
    }, substr( $text, 0, strlen( 'http' ) ) === 'http' ? $text : 'http://'.$text);
}

在PHP中将纯文本URL转换为HTML超链接

7 个答案: