PHP Connection Timeout Issue - php

Question

In one of my application, users can upload CSV file (| separated fields), after uploading I am storing all the content of file in temporary table (I truncate this table every time for new upload so that it contains the current file data). After that I am iterating over each and every row of that table, and performs some database operation as per the business logic.
The following code will illustrate this:
if(isset($_POST['btn_uploadcsv']))
{
$filename = $_FILES["csvupload"]["name"];
$uploads_dir = 'csvs'; //csv files...
$tmp_name = $_FILES["csvupload"]["tmp_name"];
$name = time();
move_uploaded_file($tmp_name, "$uploads_dir/$name");
$csvpath = "$uploads_dir/$name";
$row = 0;
$emptysql = "TRUNCATE TABLE `temp`";
$connector->query($emptysql);
if (($handle = fopen($csvpath, "r")) !== FALSE) {
$str_ins = "";
while (($data = fgetcsv($handle, 1000, "|")) !== FALSE) {
/*
* Here I am getting the column values to be store in the
* the table, using INSERT command
*/
unset($data);
}
fclose($handle);
}
/*Here I am selecting above stored data using SELECT statement */
for($j=0;$j<count($allrecords);$j++)
{
echo "In the loop";
/*If I use echo statement for debugging it is working fine*/
//set_time_limit(300);
/* I have tried this also but it is not working*/
if(!empty($allrecords[$j]['catid']))
{
// Here is my business logic which mailny deals with
// conditional DB operation
}
echo "Iteration done.";
/*If I use echo statement for debugging it is working fine*/
}
}
The problem is when I execute aboe script on server it is giving server timeout error. But when I test above script on my localhost, is is working fine.
Also as mentioned in the code, if I use echo statements for debugging, then it is working fine, and when I remove that it starts giving connection timeout problem.
I have tried set_time_limit(300), set_time_limit(0), but none of them seems to work.
Any idea, how can I resolve the above problem.
-- Many thanks for your time.
Edit:
I have checked that, files are uploading on the server.

Answer 1

set_time_limit
change to
ini_set("max_execution_time",300);
When max_execution_time is not set in php.ini set_time_limit valid.

Answer 2

I have resolved the issue using flush, to send intermediate output to the browser, while the query is executing in the background.
This is how I modified the code:
for($j=0;$j<count($allrecords);$j++)
{
/*At the end of each iteration, I have added the following code*/
echo " ";
flush();
}
Thanks to the contributors over this link PHP: Possible to trickle-output to browser while waiting for database query to execute?, from where I got inspiration.