Segmentation Fault when running PHP Cli

Question

When I type this in shell (Linux):

php index.php

Sometime PHP script terminate and I get an error saying:

Segmentation Fault

Sometime it work fine and sometime I get an error

In the php script it include PDO (mysql), Curl, some loop and "Simple HTML Dom" library

PHP Version:

username [~/www/]# php -v
PHP 5.2.9 (cli) (built: Oct  9 2010 02:01:46)
Copyright (c) 1997-2009 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2009 Zend Technologies
    with the ionCube PHP Loader v3.3.20, Copyright (c) 2002-2010, by ionCube Ltd., and
    with Zend Optimizer v3.3.9, Copyright (c) 1998-2009, by Zend Technolog

How to fix this problem? I had no problem when I tested on Windows 7 (PHP 5.3.0).

Its going to be very hard to figure out if the script is not attached. I would try to get a minimal script that can reproduce the problem (with a combination of pdo/curl etc) and post that here. The other option is to do an strace when you run the command (lookup man strace for options).b — rajasaur
– rajasaur, Commented Jul 6, 2011 at 17:13
I would first remove ionCube from the list of extensions and then try again. If it still fails, I would remove the Zend Optimizer as well. Then if it still fails, I think the suggestion from rajasaur is a good way to find out more. Alternatively, run the script in GDB. — hakre
– hakre, Commented Jul 6, 2011 at 17:14

Mathieu Rodic · Accepted Answer · 2011-07-20 14:18:35Z

3

It is about a memory access violation. In your case, this error may be due to (non-exhaustive list):

a stack overflow (often happens when the recursion level for a given function is too high)
too much data to be put in variables (e.g., you try to put the whole content of a huge file in a variable)

To know what causes trouble in your script, try commenting bigger and bigger parts to see which one is at the origin of the bug.

answered Jul 20, 2011 at 14:18

Mathieu Rodic

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Community · Accepted Answer · 2017-05-23 12:16:44Z

0

It seems your problem was solved earlier: PHP Out of Memory - Crashes Apache? May be the problem lies in memory leaks of Simple HTML Dom: http://simplehtmldom.sourceforge.net/manual_faq.htm#memory_leak

edited May 23, 2017 at 12:16

CommunityBot

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answered Jul 16, 2012 at 18:57

100grammist

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1 Comment

Andrew Over a year ago

A segmentation fault is not the same as an OOM error. See the response from Mathieu Rodic.

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