转载自https://blog.csdn.net/weixin_42440389/article/details/115640545

function autolink($foo) { $foo = eregi_replace('(((f|ht){1}tp://)[-a-zA-Z0-9@:%_/+.~#?//=]+)', 'a href="/1" target="_blank" rel="nofollow"/1/a', $foo); if( strpos($foo, "http") === FALSE ){ $foo = eregi_replace('(www.[-a-zA-Z0-9@:%_/+.~#?/

function autolink($foo)

{

$foo = eregi_replace('(((f|ht){1}tp://)[-a-zA-Z0-9@:%_/+.~#?&//=]+)', '/1', $foo);

if( strpos($foo, "http") === FALSE ){

$foo = eregi_replace('(www.[-a-zA-Z0-9@:%_/+.~#?&//=]+)', '/1', $foo);

}else{

$foo = eregi_replace('([[:space:]()[{}])(www.[-a-zA-Z0-9@:%_/+.~#?&//=]+)', '/1/2', $foo);

}

return $foo;

}

echo autolink("http://www.baidu.com 百度 http://www.sina.com.cn 新浪");