Description:
------------
I've got script running from linux shell and sometimes it crashes with "Maximum execution time of 30 seconds exceeded in some line" error in the script. 

The command on which it crashes is unpredictable. The script is runnig sometimes 10 minutes, sometimes 30 minutes and crashes on different lines. (It never runs 30 seconds).  

I am running it from command line (CLI) (max_execution_time should be 0) an I set it with set_time_limit(0) to 0.

I've tried two servers 4 php versions (4.4.2, 4.4.4,5.1.6,5.2.0)

In my php.ini is max_execution_time set to 0.

Sometimes it ends on ifx_fetch_row().
Sometimes it ends on mktime().

My configure
'./configure' '--with-config-file-path=/etc/php.ini' '--with-apache=../apache_1.3.37/' '--with-informix=/opt/informix' '--with-mysql=/usr/local/mysql/' '--enable-ftp' '--with-gd' '--enable-gd-native-ttf' '--enable-gd-imgstrttf' '--with-zlib' '--with-jpeg-dir=/usr/' '--with-freetype-dir=/usr' '--with-dom=./ext' '--with-ldap' '--with-mssql=/usr/local/' '--enable-dbase' '--with-iconv=/usr/local' 


PHP Core Info
.
.
.
max_execution_time => 0 => 30
max_input_time => -1 => 60
open_basedir => no value => no value
output_buffering => 0 => no value
output_handler => no value => no value
post_max_size => 8M => 8M
precision => 12 => 12
safe_mode => Off => Off
.
.
.

Reproduce code:
---------------
<? 
set_time_limit(0);

//connection to MYsql database
//connection to Informix database

//running Informix query (10 queries)


//doing some transformations and inserting into MYsql database (multiple insert every 100 rows)

echo "End";
 

?>




Expected result:
----------------
"End" is echoed or some meaningful error message. 

Actual result:
--------------
Fatal error:Maximum execution time of 30 seconds exceeded in ...