do...while

The do...while statement will execute a block of code at least once - it then will repeat the loop as long as a condition is true.

The following example will increment the value of $i at least once, and it will continue incrementing the variable $i as long as it has a value of less than 25;

$i = 0;
do {
    $i++;
} while($i < 25);

echo 'The final value of i is: ', $i;

The expected output is:

The final value of i is: 25