markdown php同时与do-while

Posted 2021-05-06

while:  
* checks condition _before_ each iteration
* can be bypassed entirely (not run at all)
<br>

do-while:
* checks condition _after_ each iteration (loop condition can depend exclusively on code within the loop's body)
* runs at least once

```
do {
  $localVar = true;  
} while ($localVar);

```