php语法如何实现自动替换超链接

preg_replace($pattern, $replacement, $subject)

$html = 'HTML代码';
 
$pattern = '/<a\s+[^>]*?href\s*=\s*(["\'])((?:(?!\1).)*)\1[^>]*?>/i';
$replacement = '<a href="http://新链接.com" target="_blank" rel="noopener noreferrer">';
 
$html = preg_replace($pattern, $replacement, $html);