From: robin_fernandes at uk dot ibm dot com
Operating system:
PHP version: 6CVS-2008-12-18 (snap)
PHP Bug Type: Output Control
Bug description: ob_start(): Special $chunk_size value of 1 is not honoured in
HEAD
Description:
------------
The doc for ob_start() states:
"If the optional parameter chunk_size is passed, the buffer will be
flushed after any output call which causes the buffer's length to equal or
exceed chunk_size . Default value 0 means that the function is called only
in the end, other special value 1 sets chunk_size to 4096."
In HEAD, setting $chunk_size=1 actually does set the buffer threshold size
to 1 byte, rather than 4096 bytes as on 5_* and as documented.
Here's a simple patch for HEAD to restore the documented behaviour:
Index: output.c
===================================================================
RCS file: /repository/php-src/main/output.c,v
retrieving revision 1.214
diff -u -w -p -r1.214 output.c
--- output.c 18 Aug 2008 07:45:59 -0000 1.214
+++ output.c 18 Dec 2008 14:23:10 -0000
@@ -1342,6 +1342,8 @@ PHP_FUNCTION(ob_start)
}
if (chunk_size < 0) {
chunk_size = 0;
+ } else if (chunk_size == 1) {
+ chunk_size = 4096;
}
if (SUCCESS != php_output_start_user(output_handler, chunk_size, flags
TSRMLS_CC)) {
Reproduce code:
---------------
<?php
function flushCounter($input) {
static $counter=0;
return '[' . ++$counter . "] $input \n";
}
// This should set the buffer size to 4096
ob_start('flushCounter', 1);
// Get the buffer size:
$bufferInfo = ob_get_status(true);
var_dump($bufferInfo[0]['chunk_size']);
// If the buffer size is >1, these two chars should
// come out as part of a single flush:
echo "1";
echo "2";
?>
Expected result:
----------------
[1] int(4096)
12
Actual result:
--------------
[1] int(1)
[2] 1
[3] 2
[4]
--
Edit bug report at http://bugs.php.net/?id=46903&edit=1
--
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=46903&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=46903&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=46903&r=trysnapshot60
Fixed in CVS:
http://bugs.php.net/fix.php?id=46903&r=fixedcvs
Fixed in CVS and need be documented:
http://bugs.php.net/fix.php?id=46903&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=46903&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=46903&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=46903&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=46903&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=46903&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=46903&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=46903&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=46903&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=46903&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=46903&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=46903&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=46903&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=46903&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=46903&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=46903&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=46903&r=mysqlcfg
