如何阻止一个预置替换阵列干扰另一个预置替换阵列 - How do I stop one preg replace array from interfering with another?

How do I stop one preg replace array from interfering with another?

function html_url_to_link($string) {
  $patterns = array();
  $patterns[0] = '/user'/(.+)/';
  $patterns[1] = '/http:'/'/(.+)/';
  $replacements = array();
  $replacements[0] = '<a href="/user/$1">user/$1</a>';
  $replacements[1] = '<a href="$0">$0</a>';
  return preg_replace($patterns, $replacements, $string);
}

如果文本 http://website.com/user/account，则第一个数组 (0( 会干扰第二个数组 (1(。

我能够通过翻转模式并稍微调整它们来使其发挥作用：

$patterns = array();
$patterns[] = '/http:'/'/([^'/]+)'//';
$patterns[] = '/user'/(.+)/';
$replacements = array();
$replacements[] = '<a href="$0">$0</a>';
$replacements[] = '<a href="/user/$1">user/$1</a>';
$string = 'http://website.com/user/account';
echo preg_replace($patterns, $replacements, $string);

导致...

<a href="http://website.com/">http://website.com/</a><a href="/user/account">user/account</a>