The do…while loop is almost the same thing as the while loop, with one important twist:
it always runs the code at least once, even if the condition is already false.

PHP runs the block first → then checks the condition → if the condition is still true, it loops again.

This is useful when you need to “try something first, then decide whether to continue.”
A classic WordPress-ish example would be trying to load a remote request at least once, retrying only if the first attempt fails.

Structure:

do {
  // run this at least once
} while ($condition);

Example from W3:

$i = 1;
do {
  echo $i;
  $i++;
} while ($i < 6);

This prints 1–5.
But if $i = 8:

$i = 8;
do {
  echo $i;   // prints 8 anyway
  $i++;
} while ($i < 6);

The loop stops immediately after the first run, because the condition fails.

You can use break to stop early:

$i = 1;
do {
  if ($i == 3) break;
  echo $i;
  $i++;
} while ($i < 6);

And continue to skip a specific iteration:

$i = 0;
do {
  $i++;
  if ($i == 3) continue;
  echo $i;
} while ($i < 6);

That’s the whole idea:
do…while gives you one guaranteed run, then behaves like a normal loop.