Display result after each loop - php

Question

In the code below, a url variable is increasing by 1 every time in a while loop. When $i is equal to 1000, the loop will end and $i will be displayed (from 1 all the way to 1000).
How do I display the value of $i after every loop, rather than waiting to the end?
$i = 1;
while($file = file_get_contents('http://example.com?id='.$i)) {
if($i !== 1000) {
echo $i;
}else{
break;
}
$i++;
}

Answer 1

You will need to flush message after each iteration. That way your browser will receive part of the information even if your request/response is still pending.
ob_implicit_flush(true);
$i = 1;
while($file = file_get_contents('http://example.com?id='.$i) && $i < 1000)
{
echo $i;
$i++;
ob_flush();
flush();
}
ob_end_flush();

Answer 2

Move echo $i; outside of the if() statement:
$i = 1;
while($file = file_get_contents('http://example.com?id='.$i)) {
if($i !== 1000) {
// echo $i;
}else{
break;
}
echo $i;
$i++;
}
This scenario is surely better suited for for() loop instead of while()...

Answer 3

PHP happen on the server. To see each value for $i immediately you would need to make the server:
do it's thing -> display that thing -> reload.
you can reload with header() but that is limited to 20 reloads (I think) unless you use header("Refresh:0");
I would make it display by making a stacking condition.
if(isset($diplay)){//2+ times through
$display = $display . $i . "<br>";
}else{//first time through
$diplay = $i."<br>";
}
then put that inside your condition
if($i !== 1000) {
if(isset($diplay)){
$display = $display . $i . "<br>";
}else{
$diplay = $i."<br>";
}
}else{
break;
}
echo $display
echo $display;
Then increment your variable
$i++;
then refresh page and pass the variable at the same time.
header("Refresh:0; url=page.php?i=$i");
then you'll have to add a condition at the beginning that gets $i or assign it if not found.
if(isset($_GET['i'])){//meaning if it's found in the url like so ?i=$i
$i = $_GET['i'];
}else{//first time through
$i = 1;
}
///////////////////putting it all together////////////////////////
if(isset($_GET['i'])){
$i = $_GET['i'];
}else{
$i = 1;
}
while($file = file_get_contents('http://example.com?id='.$i)) {
if($i !== 1000) {
if(isset($diplay)){
$display = $display . $i . "<br>";
}else{
$diplay = $i."<br>";
}
}else{
break;
}
echo $display;
$i++;
header("Refresh:0; url=page.php?i=$i");
}