Batch example

Let's say you need to do some operation with a large number of node and the script execution time is not enough.
In this case, you can increase the execution time of the script as follows:
set_time_limit ($ time); // $ time in seconds

This is, to put it mildly, not the most correct solution.
In this case, it is much more correct to implement this through batch .


Using batch is extremely simple. Let me give you an example.

Suppose we have an array of nid:

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1. $nids = array(
2.   0 => nid,
3.   1 => nid,
4.   …
5.   n => nid,
6. );

There is also a certain function that works with this array.
For example, we’ll just load and save the node.

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1. function batch_example_nodes_resave($nids = array()){
2.   foreach ($nids as $nid){
3.     if (is_numeric($nid)){
4.       $node = node_load($nid);
5.       node_save($node);
6.     }
7.   }
8. }

Now we describe the function with batch.
We will divide the $ nids array into parts (5 elements each) and send to batch_example_nodes_resave ()

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1. function batch_example_nodes_resave_batch($nids = array()){
2.   $operations = array();
3.   while($nids){
4.     $nids_part = array_splice($nids,  0, 5);
5.     $operations[] = array('batch_example_nodes_resave', array($nids_part ));
6.   }
7.   $batch = array(
8.     'title' => t('Resave nodes'),
9.     'operations' => $operations,
10.   );
11.   batch_set($batch);
12.   batch_process();
13. }

Now it’s enough to pass our array to batch_example_nodes_resave_batch () and see how everything works beautifully :)

ps I apologize for the double post;