PHP中高效提取视频URL及其参数：正则表达式与内置函数解析

http\S*?\.mp4\?[a-zA-Z]+=([0-9]+)&[a-zA-Z]+=([0-9a-z]+)

<?php
$htmlContent = "
    <p>这是一个包含视频链接的页面。</p>
    <a href='http://cdn.videourl.mp4?expire=1635939248&token=7022dbc14de970c7uc040ac4f35058f0'>观看视频</a>
    <img src='image.jpg'>
    <p>另一个视频链接：</p>
    <div data-video-src='http://cdn.anothervideo.mp4?expire=1635940000&token=abcdef1234567890abcdef1234567890'></div>
";

// 定义正则表达式，注意PHP中需要使用分隔符，如 '/'
$regex = '/http\S*?\.mp4\?[a-zA-Z]+=([0-9]+)&[a-zA-Z]+=([0-9a-z]+)/';

preg_match_all($regex, $htmlContent, $matches, PREG_SET_ORDER);

echo "<h3>使用正则表达式提取结果：</h3>";
if (!empty($matches)) {
    foreach ($matches as $match) {
        echo "完整URL: " . $match[0] . "<br>";
        echo "Expire: " . $match[1] . "<br>";
        echo "Token: " . $match[2] . "<br><br>";
    }
} else {
    echo "未找到匹配的视频URL。\n";
}
?>

使用正则表达式提取结果：
完整URL: http://cdn.videourl.mp4?expire=1635939248&token=7022dbc14de970c7uc040ac4f35058f0
Expire: 1635939248
Token: 7022dbc14de970c7uc040ac4f35058f0

完整URL: http://cdn.anothervideo.mp4?expire=1635940000&token=abcdef1234567890abcdef1234567890
Expire: 1635940000
Token: abcdef1234567890abcdef1234567890

http\S*?\.mp4\?(?:expire=(?P<expire>[0-9]+)&token=(?P<token>[0-9a-z]+)|token=(?P<token>[0-9a-z]+)&expire=(?P<expire>[0-9]+))

<?php
$videoUrl = "http://cdn.videourl.mp4?expire=1635939248&token=7022dbc14de970c7uc040ac4f35058f0";

// 1. 使用 parse_url 提取查询字符串
$queryString = parse_url($videoUrl, PHP_URL_QUERY);

$params = [];
if ($queryString) {
    // 2. 使用 parse_str 将查询字符串解析为数组
    parse_str($queryString, $params);
}

echo "<h3>使用 parse_url 和 parse_str 提取结果：</h3>";
if (!empty($params)) {
    echo "原始URL: " . $videoUrl . "<br>";
    echo "查询参数数组: <pre>";
    var_dump($params);
    echo "</pre>";

    // 可以直接访问参数
    if (isset($params['expire'])) {
        echo "Expire: " . $params['expire'] . "<br>";
    }
    if (isset($params['token'])) {
        echo "Token: " . $params['token'] . "<br>";
    }
} else {
    echo "未找到URL查询参数。\n";
}

// 示例：处理没有参数的URL
$simpleUrl = "http://cdn.simplevideo.mp4";
$simpleQuery = parse_url($simpleUrl, PHP_URL_QUERY);
$simpleParams = [];
if ($simpleQuery) {
    parse_str($simpleQuery, $simpleParams);
}
echo "<br><h3>处理无参数URL：</h3>";
echo "原始URL: " . $simpleUrl . "<br>";
echo "查询参数数组: <pre>";
var_dump($simpleParams);
echo "</pre>";
?>

使用 parse_url 和 parse_str 提取结果：
原始URL: http://cdn.videourl.mp4?expire=1635939248&token=7022dbc14de970c7uc040ac4f35058f0
查询参数数组: 
array(2) {
  ["expire"]=>
  string(10) "1635939248"
  ["token"]=>
  string(32) "7022dbc14de970c7uc040ac4f35058f0"
}
Expire: 1635939248
Token: 7022dbc14de970c7uc040ac4f35058f0

处理无参数URL：
原始URL: http://cdn.simplevideo.mp4
查询参数数组: 
array(0) {
}