[Solar-talk] Narrowing down the apache crash bug

[Andrew Shell]

So I ran it under the command line and the CLI crashes.  I upped the 
memory limit to 64MB and it still crashed.

This is what's weird...

I changed the code so instead of just using str_repeat at the top to 
make a for loop so I could have each test would be numbered.

What happens is that the code completes.  The preg_replace is done and 
echoed at the end and then it crashes.

Here is the updated code...

<?php
$text = '';

for ($i = 0; $i < 500; $i++) {
    $text .= "<p>test{$i}\n</p>\r\n"; // Crash
}

$result = preg_replace("{
            (                      # save in $1
                ^                  # start of line  (with /m)
                <(p)               # start tag = $2
                \\b                # word break
                (.*\\n)*?          # any number of lines, minimally matching
                </\\2>             # the matching end tag
                [ \\t]*            # trailing spaces/tabs
                (?=\\n+|\\Z)       # followed by a newline or end of 
document
            )
    }xm",
    'x',
    $text
);

echo $result;
?>


Paul M Jones wrote:
> On Sep 19, 2006, at 3:53 PM, Andrew Shell wrote:
>
>   
>> I've tried to write a stand alone script with as little code as  
>> possible
>> to replicate the error.
>> Here's what I got.
>> It doesn't seem to be a problem with preg_replace_callback or what we
>> are returning.  It seems to be a combo of
>> whitespace chars and number of lines
>>     
>
> Dude, good detective work.  This almost looks like a memory error,  
> caused by recursion in the PCRE parser, but obviously I'm not sure.   
> This will sounds dumb, but: can you run the tests from the command  
> line (not through the web server) and see what happens?  Secondarily,  
> can you up the memory limit in PHP and see if that helps?
>
> Let me know what you find out.
>
>
>
> --
>
> Paul M. Jones  <http://paul-m-jones.com>
>
> Solar: Simple Object Library and Application Repository
> for PHP5.   <http://solarphp.com>
>
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>
>
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