将所有 url 替换为 PHP 中的链接

Question

我想将文本中的所有网址设为超链接。我做了以下事情。但链接缺少“：”。任何帮助表示赞赏。<?php$string = "Hallo Studenten http://google.com/your/subpage and https://www.yahoo.com/my/subpage";  $regexp = "/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i";  $anchorMarkup = "<a href=\"%s://%s\" target=\"_blank\" >%s</a>";  preg_match_all($regexp, $string, $matches, \PREG_SET_ORDER);  foreach ($matches as $match) {    if (empty($match[1]) && empty($match[7])) {      $http = $match[2]?$match[2]:'http';      $replace = sprintf($anchorMarkup, $http, $match[0], $match[0], $match[1]);      $string = str_replace($match[0], $replace, $string);    }  }  echo $string; ?>http://phpfiddle.org/lite/code/2yg5-i3uj

Answer 1

可以使用preg_replace函数来完成：

$string       = "Hallo Studenten http://google.com/your/subpage and https://www.yahoo.com/my/subpage";

$regexp       = "/\b(?:(?:https?|ftp):\/\/|www\.)[-a-z0-9+&@#\/%?=~_|!:,.;]*[-a-z0-9+&@#\/%=~_|]/i";

$anchorMarkup = "<a href=\"$0\" target=\"_blank\" >$0</a>";

echo preg_replace($regexp, $anchorMarkup, $string);