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Bug #25074 addslashes() fails for large data
Submitted: 2003-08-13 06:38 UTC Modified: 2003-08-13 13:01 UTC
From: sandeepc at myrealbox dot com Assigned:
Status: Not a bug Package: Performance problem
PHP Version: 4.2.3 OS: Linux 2.4.9
Private report: No CVE-ID: None
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From: sandeepc at myrealbox dot com
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 [2003-08-13 06:38 UTC] sandeepc at myrealbox dot com 
Description:
------------
using addslashes() on large data fails. We tested with data size ranging form 4MB to 100 MB.It would fail around 36 MB of data.

I have'nt tested this in the latest releases, however.

From phpinfo():

PHP Version 4.2.3

System: Linux linuxbuild 2.4.9-e.3smp #1 SMP Fri May 3 16:48:54 EDT 2002 i686

Build Date	Apr 29 2003 17:44:32

Server API	Apache

Virtual Directory Support	disabled

Thread Safety	disabled

Configure Command	'./configure'  '--enable-shared=all' '--disable-static' '--enable-memory-limit=yes' '--enable-magic-quotes=yes' '--enable-debug=no' '--enable-inline-optimization' '--enable-mbstring' '--enable-safe-mode' '--enable-sigchild' '--enable-sysvsem' '--enable-sysvshm' '--enable-shmop' '--enable-track-vars' '--enable-gd-native-ttf' '--enable-gd-imgstrttf' '--with-gd' '--with-xml' '--with-dom' '--with-ttf' '--with-gettext' '--with-ldap' '--with-curl' '--with-mcrypt' '--without-mysql' '--without-imap' '--with-pgsql' '--with-apxs'


Reproduce code:
---------------
<?php
if ($upload){
 $size=filesize($uploaded_data);
 $data = "";
 if (is_uploaded_file($uploaded_data)){
        if ($fp = fopen($uploaded_data, "r")){
            $data = fread($fp,$size);
            fclose($fp);
            addslashes($data);
            print "Hello World";
        }// end if (able to get uploaded file)
  }
}
else{
?>
<html>
<form method="POST" enctype="multipart/form-data" name="testform">
<input type="hidden" name="MAX_FILE_SIZE" value="104857600">
<input type="file" name="uploaded_data" size="30"><br><br>
<input type="submit" name="upload" value="Upload">
</form>
</html>
<?php
}
?>

Expected result:
----------------
We are storing the uploaded file into a table(Postgres).
The uploaded data needs to be addslashes()'d before storing into the database.

Actual result:
--------------
There is no error in the error log, however the php hangs.

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Pull Requests

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 [2003-08-13 12:24 UTC] iliaa@php.net 
Sorry, but your problem does not imply a bug in PHP itself.  For a
list of more appropriate places to ask for help using PHP, please
visit http://www.php.net/support.php as this bug system is not the
appropriate forum for asking support questions. 

Thank you for your interest in PHP.

This sounds like a configuration issue, possibly having to do with the memory limit.
 [2003-08-13 13:01 UTC] sniper@php.net 
And also an ancient version of PHP..we're about to release 4.3.3, you know..
 
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