html - Php Error in_array() null given -

-

i followed tutorial on making web crawler app. pulls links page , follows them. have problem pushing foreach loop of links global variable. keep getting error says second variable in in_array should array set to. there there guys might see bugging code?

error:

in_array() expects parameter 2 array, null given

html:

       <?php      $to_crawl = "http://thechive.com/";  $c = array();      function get_links($url){         global $c;         $input = file_get_contents($url);         $regexp = "<a\s[^>]*href=(\"??)([^\" >]*?)\\1[^>]*>(.*)<\/a>";          preg_match_all("/$regexp/siu", $input, $matches);          $l = $matches[2];          $base_url = parse_url($url, php_url_host);          foreach($l $link){             if(strpos($link, '#')){                 $link = substr($link, 0, strpos($link, '#'));             }              if(substr($link, 0, 1) == "."){                       $link = substr($link, 1);             }              if(substr($link, 0, 7) == "http://"){                               $link = $link;                     } elseif(substr($link, 0, 8) == "https://"){                               $link = $link;                     } elseif(substr($link, 0, 2) == "//"){                               $link = substr($link, 2);                     } elseif(substr($link, 0, 1) == "#"){                               $link = $url;                     } elseif(substr($link, 0, 7) == "mailto:"){                               $link = "[".$link."]";                     } else{                         if(substr($link, 0,1) != "/"){                             $link = $base_url."/".$link;                         } else{                             $link = $base_url.$link;                         }                     }             if(substr($link, 0, 7) != "http://" && substr($link, 0, 8) != "https://" && substr($link, 0, 1) != "["){              if(substr($link, 0 , 8) == "https://"){                     $link = "https://".$link;              } else{                 $link= "http://".$link;              }             }          if (!in_array($link, $c)){             array_push($c, $link);             }           }     }      get_links($to_crawl);      foreach($c $page){         get_links($page);     }      foreach($c $page){         echo $page."<br/ >";     }      ?>

trying make "global" $c @ each iteration bad design. should avoid "global" when it's possible.

here see 2 choices :

1/ pass array reference (search google that) in parameter of "get_links" function. allow fill array function.

exemple :

function getlinks($url, &$links){     //do stuff find links     //then add each link array     $links[] = $onelink; }  $alllinks = array(); getlinks("thefirsturl.com", $alllinks); //call getlinks many want  //then array contain links print_r($alllinks);

or 2/ make "get_links" return array of links, , concatenate bigger 1 store links.

function getlinks($url){     $links = array();      //do stuff find links     //then add each link array     $links[] = $onelink;     return $links; }  $alllinks = array(); $alllinks += getlinks("thefirsturl.com"); //call getlinks many want. note concatenation operator += print_r($alllinks);

Comments

Post a Comment

Popular posts from this blog

php - Invalid Cofiguration - yii\base\InvalidConfigException - Yii2 -

-
Image
i've installed yii2-user module/dektrium yii2-app-basic application command composer require "dektrium/yii2-user:0.9.*@dev" config/console.php return [ . . 'modules' => [ 'gii' => 'yii\gii\module', 'user' => [ 'class' => 'dektrium\user\module', ], ], . . ] config/web.php 'components' => [ . . /* 'user' => [ 'identityclass' => 'app\models\user', 'enableautologin' => true, ], */ 'modules' => [ 'user' => [ 'class' => 'dektrium\user\module', ], ], . . ] after that, run command $ php yii migrate/up --migrationpath=@vendor/dektrium/yii2-user/migrations updating database schema . but, when run http://localhost/mylawsuit/yii/web/index.php?r=u
Read more

How to show in django cms breadcrumbs full path? -

-
need advice - how show in breadcrumbs whole path article or page? i've got code: {% ance in ancestors %} <li> {% if not forloop.last %} <a href="{{ ance.get_absolute_url }}">{{ ance.get_menu_title }}</a> {% else %} <span class="active">{{ ance.get_menu_title }}</span> {% endif %} </li> {% endfor %} but shows "home" , current page. how modify show whole path in breadcrumbs? i've found in file menu_tags.py code calls ancestors. @ least there class showbreadcrumbs: class showbreadcrumb(inclusiontag): """ shows breadcrumb node has same url current request - start level: after level should breadcrumb start? 0=home - template: template used render breadcrumb """ name = 'show_breadcrumb' template = 'menu/dummy.html' options = options( argument('start_level', default=0, require
Read more

ruby on rails - npm error: tunneling socket could not be established, cause=connect ETIMEDOUT -

-
i have app uses rails framework , implements angularjs part of front end. i have pushed heroku , have heroku toolbelt installed, when try migrate db using "heroku run rake db:migrate" receive following error(s): installing core plugins heroku-cli-addons, heroku-apps, heroku-fork, heroku-git, heroku-local, heroku-run, heroku-status... error installing package. try running again gode_debug=info see more output. ! `run` not heroku command. ! perhaps meant `-h`, `2fa`, `auth`, `join`, `open`, `orgs`, `pg`, `ps` or `rake`. ! see `heroku help` list of available commands. i run command "gode_debug=info heroku run rake db:migrate" , receive error: npm err! darwin 14.5.0 npm err! argv "/users/christopher_pelnar/.heroku/node-v4.2.1-darwin-x64/bin/node" "/users/christopher_pelnar/.heroku/node-v4.2.1-darwin-x64/lib/node_modules/npm/cli.js" "install" "heroku-cli-addons" "heroku-apps" "heroku-fork
Read more