Bug #66928 [Opn]: ob_start()/ob_end_clean() and memory_limit
| From: | leon at struktur dot de | Date: | Tue, 18 Mar 2014 20:22:51 +0000 |
| Subject: | Bug #66928 [Opn]: ob_start()/ob_end_clean() and memory_limit | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-184827@lists.php.net to get a copy of this message | ||
Edit report at https://bugs.php.net/bug.php?id=66928&edit=1
ID: 66928
User updated by: leon at struktur dot de
Reported by: leon at struktur dot de
Summary: ob_start()/ob_end_clean() and memory_limit
Status: Open
Type: Bug
Package: Output Control
Operating System: *
PHP Version: Irrelevant
Block user comment: N
Private report: N
New Comment:
New test script:
$img = @imagecreatefromstring(file_get_contents($file));
if($img !== false)
{
imagealphablending($img, false);
imagesavealpha($img, true);
ob_start();
imagepng($img);
$img_content = ob_get_clean();
imagedestroy($img);
$img_content = base64_encode($img_content);
return $img_content;
}
Output: "* PNG IHDR**"
New test #2 script:
$img = @imagecreatefromstring(file_get_contents($file));
if($img !== false)
{
imagealphablending($img, false);
imagesavealpha($img, true);
ob_start();
echo 'LALALA';
imagepng($img);
$img_content = ob_get_clean();
imagedestroy($img);
$img_content = base64_encode($img_content);
return $img_content;
}
Output: "LALALA* PNG IHDR**"
BTW: It works (I get no output) when I add ini_set('memory_limit', '-1');
Previous Comments:
------------------------------------------------------------------------
[2014-03-18 19:56:50] leon at struktur dot de
Description:
------------
COPY FROM : https://bugs.php.net/bug.php?id=45392
STILL NOT FIXED, BUT BUG IS CLOSED !!
When memory_limit is reached, and one is using the output buffering functions, instead of just dying
with an "out of memory" error, the contents of the buffer are spilled onto stdout.
The output_buffering ini setting wasn't set to any particular limit.
Test script:
---------------
<?php
ob_start();
$i = 0;
while($i++ < 10000000) {
echo str_repeat("lol", 42);
}
ob_end_clean();
/*Note that the 10,000,000 number varies according to your memory_limit*/
Expected result:
----------------
STDERR: Fatal error: Allowed memory size of 134217728 bytes exhausted at
/home/flebron/cvs/php/php5.3-200806291230/main/output.c:395 (tried to allocate 133693441 bytes) in
/home/flebron/cvs/php/ob.php on line 5
Actual result:
--------------
STDERR: Fatal error: Allowed memory size of 134217728 bytes exhausted at
/home/flebron/cvs/php/php5.3-200806291230/main/output.c:395 (tried to allocate 133693441 bytes) in
/home/flebron/cvs/php/ob.php on line 5
STDOUT: The text in the buffer is printed to stdout (millions of "lolol"s).
------------------------------------------------------------------------
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Edit this bug report at https://bugs.php.net/bug.php?id=66928&edit=1