php 正则表达式解析字符串里的所有 URL 地址
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php 正则表达式解析字符串里的所有 URL 地址实现代码,有需要了解
学习的朋友可进入参考。
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
(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
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
<?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)){