php execution scheduling (HELP)!!!

jaylee

I've posed a similar question in General Help, but my problem is still unsolved. I hope to receive some more feedback in this Coding forum.

I have a php script scheduled to do some routined tasks under cronjobs. The primary code execution is the following 3 lines:

$filename = "http://www.domain.com/image.jpg";
$size = @getimagesize ($filename);
$fp = @fopen($filename, "r");

But sometimes due to the extremely slow connectivity to the remote url, my code execution got stuck, and it took 5 - 10+ minutes to get through.

If there some way for me to set a timer, such that after 60 seconds of unsuccessful waiting (before the complete data is fetched), this portion of code will be skipped and return a flag of indication?

Thanks.

dnszero

I don't know if php can do that or not, but one work around might be to use something else with that feature (ncftp, lynx, curl, etc) to download it and then just work off the local file.

Not exactly what your looking for maybe...but if all else fails.

Weedpacket

Well, first of all I see you reading the entire file twice - once to get its size and once for something else.

See also [man]fsockopen[/man], which offers a timeout. You'll have to deal with the http headers yourself, though.

There is also a [man]stream_set_timeout[/man], but the status of its implementation is fairly adumbral.

Meanwhile, PHP4.3 introduces the configuration setting default_socket_timeout.

jaylee

is it possible to do something to kill the process itself after certain duration by sending a signal of alarm?

Weedpacket

Kill the PHP process a certain time after a certain point? Use [man]set_time_limit[/man] at the point where you want to start timing from.

jaylee

According to the documentation:
Set the number of seconds a script is allowed to run. If this is reached, the script returns a fatal error.

What if I need to pass out a message for this execution failure?

Can you show me an example?

Thanks.

Weedpacket

[man]set_error_handler[/man]
Any other bits of the manual you'd like me to refer you to?

jaylee

Hi Weedpacket,

Sorry for the inconvenience, but I'm still having trouble in understanding the usage of set_error_handler after reading the documentation.

Is it possible for you show me a simplified demonstration of code of capturing and return the customization of fatal error returned by set_time_limit.

Thanks.