PHP while 循环

The while loop - Loops through a block of code as long as the specified condition is true.

PHP while 循环

The while loop executes a block of code as long as the specified condition is true.

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

The while loop does not run a specific number of times, but checks after each iteration if the condition is still true.

The condition does not have to be a counter, it could be the status of an operation or any condition that evaluates to either true or false.

break 语句

With the break statement we can stop the loop even if the condition is still true

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

continue 语句

使用 continue 语句，我们可以停止当前循环，并继续下一个循环。

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

替代语法

while 循环语法也可以用 endwhile 语句写成这样。

$i = 1;
while ($i < 6):
  echo $i;
  $i++;
endwhile;

步骤 10

如果你想让 while 循环计数到 100，但每次只加 10，你可以在每次循环中将计数器增加 10 而不是 1。

$i = 0;
while ($i < 100) {
  $i+=10;
  echo $i "<br>";
}