give each loop 30 sec execution time

Question

I have my application hosted in Siteground, in a shared host. I have build a cron job that executes a php file every night. The problem is that that file contains a main loop that executes the code, 85 times. More precisely, i take arrays of data and manipulate them. This is done 85 times. Something like this:

<?php
$main_array = array("//85 elements");
foreach ($main_array as $var){

 $array1 = array ("//a lot of data");
//manipulate array1

}
?>

Since there are many manipulations of the taken data, it takes 2 minutes and 5' to completely execute. By any chance.. is there a way to set the execution time 30 sec for each "foreach" loop?? I can't move to dedicated host, so i need to figure something else out..

Thanks in advace

Answer 1

Use microtime() to evaluate running time of each loop.

<?php
$main_array = array("//85 elements");
foreach ($main_array as $var){
  $time_start = microtime(true);
  $array1 = array ("//a lot of data");
  //manipulate array1
  $time_end = microtime(true);
  $time = $time_end - $time_start;
  //check sometimes in your script whether execution time is reached
  if($time > 30){
    break; //or continue; which you want
  }
}
?>

http://php.net/manual/en/function.microtime.php

But the execution time is really long, what is sour script calculating? Maybe there are much more effective ways to do so...

Answer 2

set_time_limit(30); //Enter the value in seconds

Check set_time_limit() in php