php正则表达式解析字符串里的所有URL地址

分享一个同事写的URL正则表达式，缺点不支持中文URL：

代码如下	复制代码
(http[s]{0,1}\|ftp)://[a-zA-Z0-9\.\-]+\.([a-zA-Z]{2,4})(:\d+)?(/[a-zA-Z0-9\.\-~!@#$%^&+?:_/=<>])?

下面介绍一个可以支持中文正则url

代码如下	复制代码
var regexp = new RegExp("(http[s]{0,1}\|ftp)://[a-zA-Z0-9\.\-]+\.([a-zA-Z]{2,4})(:\d+)?(/[a-zA-Z0-9\.\-~!@#$%^&+?:_/=<>])?", "gi"); var urls = textbox.value.match(regexp) \|\| [];//textbox为文本框 console.log(urls);

实例

代码如下

复制代码

<?php
// $html        = the html on the page
// $current_url = the full url that the html came from (only needed for $repath)
// $repath      = converts ../ and / and // urls to full valid urls
function pageLinks($html, $current_url = "", $repath = false){
    preg_match_all("/<a.+?href=("|')(?!javascript:|#)(.+?)("|')/i", $html, $matches);
    $links = array();
    if(isset($matches[2])){
        $links = $matches[2];
    }
    if($repath && count($links) > 0 && strlen($current_url) > 0){
        $pathi      = pathinfo($current_url);
        $dir        = $pathi["dirname"];
        $base       = parse_url($current_url);
        $split_path = explode("/", $dir);
        $url        = "";
        foreach($links as $k => $link){
            if(preg_match("/^../", $link)){
                $total = substr_count($link, "../");
                for($i = 0; $i < $total; $i++){
                    array_pop($split_path);
                }
                $url = implode("/", $split_path) . "/" . str_replace("../", "", $link);
            }elseif(preg_match("/^///", $link)){
                $url = $base["scheme"] . ":" . $link;
            }elseif(preg_match("/^/|^.//", $link)){
                $url = $base["scheme"] . "://" . $base["host"] . $link;
            }elseif(preg_match("/^[a-zA-Z0-9]/", $link)){
                if(preg_match("/^http/", $link)){
                    $url = $link;
                }else{
                    $url       = $dir . "/" . $link;
                }
            }
            $links[$k] = $url;
        }
    }
    return $links;
}
header("content-type: text/plain");
$url = "http://www.hzhuti.com";
$html = file_get_contents($url);
// Gets links from the page:
print_r(pageLinks($html));

// Gets links from the page and formats them to a full valid url:
print_r(pageLinks($html, $url, true));

补充：Php教程,Php应用