Question

我有一个递归函数，但它只返回初始数据：

$urls[] = 'http://site1.com';
$urls[] = 'http://site2.com';
foreach($urls as $url) {
   $output = getMainPage($url, $zids, $listing_count, array(), array());
}
print_r($output); //Line 1
function getMainPage($url, $zids, $listing_count, $ids = array(), $names = array()) {
     $dom = new DOMDocument;
     @$dom->loadHTML($html);
     $links = $dom->getElementsByTagName('a');
     $output_html = '';
     foreach ($links as $link){
         print_r($ids); //Line 2
         $ids[] = $this_id;
         $names[] = $this_name;
         $listing_count++;
         if(strpos($href, 'next') !== FALSE) {
             $url = $next_url;
             $o = getMainPage($url, $zids, $listing_count, $ids, $names);
         }
     }
     $output['ids'] = $ids;
     $output['names'] = $names;
     return $output;
}

print_r（$ output）; //第1行只输出来自foreach $ link循环的初始数据集，但是print_r（$ ids）; //第2行输出增量ID。因此，当然在循环结束之前返回输出。

修改：新代码（结果相同，只有最后一组数据除外）

$urls[] = 'http://site1.com';
$urls[] = 'http://site2.com';
foreach($urls as $url) {
   $output = getMainPage($url, $zids, $listing_count, array(), array());
}
print_r($output); //Line 1
function getMainPage($url, $zids, $listing_count, $ids = array(), $names = array()) {
     $dom = new DOMDocument;
     @$dom->loadHTML($html);
     $links = $dom->getElementsByTagName('a');
     $output_html = '';
     foreach ($links as $link){
         print_r($ids); //Line 2
         $output['ids'][] = $this_id;
         $output['$names'][] = $this_name;
         $listing_count++;
         $output['listing_count'] = $listing_count;
         if(strpos($href, 'next') !== FALSE) {
             $url = $next_url;
             $output = getMainPage($url, $output['zids'], $output['listing_count'], $output['ids'], $output['names']);
         }
     }

     return $output;
}

Answer 1

你可以试试这个：

$urls[] = 'http://site1.com';
$urls[] = 'http://site2.com';
foreach ($urls as $url) {
    $output = getMainPage($url, $zids, $listing_count, array(), array());
}
print_r($output); //Line 1

function getMainPage($url, $zids, $listing_count, $ids = array(), $names = array(), $o = array()) {
    $dom = new DOMDocument;
    @$dom->loadHTML($html);
    $links = $dom->getElementsByTagName('a');
    $output_html = '';
    foreach ($links as $link) {
        print_r($ids); //Line 2
        $output['ids'][] = $this_id;
        $output['$names'][] = $this_name;
        $listing_count++;
        $output['listing_count'] = $listing_count;
        $o[] = $output;
        if (strpos($href, 'next') !== FALSE) {
            $url = $next_url;
            $o = getMainPage($url, $output['zids'], $output['listing_count'], $output['ids'], $output['names'], $o);
        }
    }

    return $o;
}

Answer 2

我终于明白了：

import java.lang.IllegalArgumentException

def call() {
    return this
}

def cloneRepo(Map parameters = [url: null, branch: "master", credentials: null]) {
    def url = parameters.getOrDefault("url", null)
    def branch = parameters.getOrDefault("branch", "master")
    def credentials = parameters.getOrDefault("credentials", null)

    script {
        if(!url) {
            throw new IllegalArgumentException("cloneRepo() expects url argument to be present!")
        }

        if(credentials == null) {
            credentials = getCredentials(url)
        }

        if (branch.matches("\\d+") || branch.matches("PR-\\d+")) {
            if (branch.matches("PR-\\d+")) {
                branch = branch.substring(3)
            }
            checkout changelog: false, poll: false, scm: [
                    $class: 'GitSCM',
                    branches: [[name: 'pr/' + branch]],
                    doGenerateSubmoduleConfigurations: false,
                    extensions: [[$class: 'LocalBranch', localBranch: 'pr/' + branch]],
                    submoduleCfg: [],
                    userRemoteConfigs: [[
                                                credentialsId: credentials,
                                                refspec: 'refs/pull/' + branch + '/head:pr/' + branch,
                                                url: url
                                        ]]
            ]
        } else {
            checkout changelog: false, poll: false, scm: [
                    $class: 'GitSCM',
                    branches: [[name: branch]],
                    doGenerateSubmoduleConfigurations: false,
                    extensions: [],
                    submoduleCfg: [],
                    userRemoteConfigs: [[
                                                credentialsId: credentials,
                                                url: url
                                        ]]
            ]
        }
    }
}

}

从递归函数php获取数据

2 个答案: