Update all answer articles using script at same time,

Summary

I wanted to update all the articles using a custom script but it's not able to process more than 200 records.

Content

I am trying to update all the articles using custom script. I wrote the script which fetches all the answers and then remove a particular lines from the answers. 

But in doing so i am able to reterieve only 200 records or so. Is there any better way to update thousands articles.

$ar = RNCPHP\AnalyticsReport::fetch( 106134 );

$arr= $ar->run();

for ( $ii = $arr->count(); $ii--; )

{

$row = $arr->next();

$answer = RNCPHP\Answer::fetch( $row["Answer ID"] );

 $html = preg_replace('#<button id="wmcckbtopBtn"(.*?)>(.*?)</script>#is', '', $answer->Solution);