function drupal_set_time_limit

7 drupal_set_time_limit($time_limit)

Attempts to set the PHP maximum execution time.

This function is a wrapper around the PHP function set_time_limit(). When called, set_time_limit() restarts the timeout counter from zero. In other words, if the timeout is the default 30 seconds, and 25 seconds into script execution a call such as set_time_limit(20) is made, the script will run for a total of 45 seconds before timing out.

It also means that it is possible to decrease the total time limit if the sum of the new time limit and the current time spent running the script is inferior to the original time limit. It is inherent to the way set_time_limit() works, it should rather be called with an appropriate value every time you need to allocate a certain amount of time to execute a task than only once at the beginning of the script.

Before calling set_time_limit(), we check if this function is available because it could be disabled by the server administrator. We also hide all the errors that could occur when calling set_time_limit(), because it is not possible to reliably ensure that PHP or a security extension will not issue a warning/error if they prevent the use of this function.


$time_limit: An integer specifying the new time limit, in seconds. A value of 0 indicates unlimited execution time.

Related topics

4 calls to drupal_set_time_limit()
DrupalWebTestCase::setUp in modules/simpletest/drupal_web_test_case.php
Sets up a Drupal site for running functional and integration tests.
drupal_cron_run in includes/
Executes a cron run when called.
node_access_rebuild in modules/node/node.module
Rebuild the node access database. This is occasionally needed by modules that make system-wide changes to access levels.
_locale_import_po in includes/
Parses Gettext Portable Object file information and inserts into database


includes/, line 2775
Common functions that many Drupal modules will need to reference.


function drupal_set_time_limit($time_limit) {
  if (function_exists('set_time_limit')) {