如何在PHP中超过max_execution_time

Question

In PHP, I want to run a script who need 2 minutes to compute but my max_execution_time is only 30 seconds.
I can't change my max_execution_time in php.ini nor call shell_exec

I already done all the optimization I could think of. Any idea?

Answer 1

Even if you can't change the php.ini file itself, you might be able to change options via PHP code with ini_set .

You can also try to call set_time_limit inside your code, resetting the current time counter (this doesn't work in safe mode).

If that doesn't work, try to split the task up into multiple sub-tasks and save the temporary results, so that you can perform the task on multiple executions and thus bypass the time limit.

Answer 2

The "best" option you have is to cut your algorithm into smaller part. Each part should execute within 30 second to avoid timeout. Here are few ideas.

Using CURL:

• [Script Start] Call run.php let is compute for 20s.
• Save it stat into a database with an ID
• Make a CURL call run.php?resumeID=384 [Script finish]
• [Script Start] retrieve the stat and continue the computation
• and so on...

Using CRON task:

• call run.php every second. It will pick a task in your database then flag as "in progress". So next time run.php is call it will not pick the "in progress task"
• After 20s of computation, save the stat of your script in database and change the "in progress" flag to false.
• Next call to run.php will pick the task and continue the processing
• and so on...

Answer 3

You can also set it in your .htaccess file

Add the following line to your .htaccess file

php_value max_execution_time 200 

Answer 4

使用方式

ini_set('max_execution_time', 100);