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Created attachment 6153 [details]
response from Wikibot

I use Wikibot (http://en.wikipedia.org/wiki/User:LivingBot/Wikibot.php5) in my script Test.php:

<source lang="php">
<?php
  //grab class
  include('Wikibot.php5');
  //get user&password
  $fhUP = fopen("user&password.txt", 'r') or die("Can't open user&password file");
  $username = rtrim(fgets($fhUP));
  $password = rtrim(fgets($fhUP));
  fclose($fhUP);
  // open file with page names
  $fhPN = fopen("page_names.txt", 'r') or die("Can't open page_names file");  
  //create bot
  $wiki = "en";
  $MyBot = new Wikibot($username, $password, $wiki);
  // get first page
  $pagename = rtrim(fgets($fhPN));
  // process page names
  $i = 0;
  echo "\n";    
  while (!feof($fhPN)) 
  {
   echo "\nPage " . ++$i . " [[" . $wiki . ":" . $pagename . "]]\n";  
   $page = $MyBot->get_page($pagename);
   $out = $MyBot->edit_page($pagename,$page."<br><br>Test ".date("Y-m-d H:i:s"),"test",false,false);    
   // next page
   $pagename = rtrim(fgets($fhPN));
  }
  fclose($fhPN);
?>
</source>

File page_names.txt contains two lines: User:Ency/test1 and User:Ency/test2. Execute

# php Test.php 

gives right result with 1st page and for a while obscure with 2nd:

Page 1 [[en:User:Ency/test1]]
Successfully edited User:Ency/test1.<br />

Page 2 [[en:User:Ency/test2]]
Error - &nbsp;<br />
^^^ Error with put_page called from edit_page.<br />

I found that Wikibot in 221 line ($response = curl_exec($ch);) gives such $response for 1st page:

a:1:{s:4:"edit";a:5:s:6:"result";s:7:"Success";s:6:"pageid";i:22950702;s:5:"title";s:15:"User:Ency/test1";s:8:"oldrevid";i:292303690;s:8:"newrevid";i:292303840;}}

and for 2nd only html standard error page (see attachment 2 [details]nd_response.html), which is returned after unserialize as empty array.

Is it a API bug in 2nd case?