第一個
$text = eregi_replace("([^=\\"])(http|ftp|gopher://[^ \\n\\r]+(?=[\\s\\.,]))","\\\\1<a href=\\"\\\\2\\" target=_top>\\\\2</a>", $text);
第二個
$comment = eregi_replace("([_\\.0-9a-z-]+@([0-9a-z][0-9a-z-]+\\.)+[a-z]
{2,3})","<a href=\\"mailto:\\\\1\\">\\\\1</a>", $comment);
抄個煩點的齊全板版
function buildHyperlinks($string) {
$httpurl =
"(((f|ht){1}tp://)[a-zA-Z0-9@:%_.~#-\\?&]+[a-zA-Z0-9@:%_~#\\?&])";
$wwwsurl =
"(([[:space:]+]|^)(www[.][a-zA-Z0-9@:%_.~#-\\?&]+[a-zA-Z0-9@:%_~#\\?&]))";
$mailurl =
"([-!#$%&\\\'*+\\\\./0-9=?A-Z^_`a-z{|}~]+@[-!#$%&\\\'*+\\\\/0-9=?A-Z^_`a-z{|}~]+\\.[-!#$%&\\\'*+\\\\./0-9=?A-Z^_`a-z{|}~]+)";
$parts = explode(" ", $string);
for($i = 0; $i < sizeof($parts); $i++) {
if(eregi($httpurl, $parts[$i])) {
$temp = $parts[$i];
$parts[$i] = eregi_replace($httpurl, "<a href=\\"\\\\1\\"
target=\\"_blank\\">", $parts[$i]);
$parts[$i] .= "$temp</a>";
}
if(eregi($wwwsurl, $parts[$i])) {
$temp = $parts[$i];
$parts[$i] = eregi_replace($wwwsurl, "\\\\2<a
href=\\"http://\\\\3\\" target=\\"_blank\\">", $parts[$i]);
$parts[$i] .= "$temp</a>";
}
if(eregi($mailurl, $parts[$i])) {
$temp = $parts[$i];
$parts[$i] = eregi_replace($mailurl, "<a
href=\\"mailto:\\\\1\\">", $parts[$i]);
$parts[$i] .= "$temp</a>";
}
}
return join(" ", $parts);
}
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