Just to learn, I've created an unlimited loop function which is like below:

```
    <?php
for ($t=1; $t>0; $t++){
echo ">> Its Running...<br/>"   ;
}
?>

```

I'm on shared host and Apache Server. When I run this on host, then it shows "Maximum Execution Time 30 second exceeded." Then I tried to use the below line

```
ini_set("max_execution_time", "0"); /// for unlimited exe. time

```

It is still showing ""Maximum Execution Time 30 second exceeded in Line 4."
why the ini setting not changed. may there any option in my shared host owner side to block changing ini setting.
-I'm a learner and eager to know more and more on PHP. any help is appreciated. 

(Actually I'm creating a MLM project where I need to run some cron job which take 10-15 minute)