php流程控制 break continue

<script>ec(2);</script>

break
break 结束当前 for，foreach，while，do-while 或者 switch 结构的执行。

continue

结束当前循环,跳转到下次例:

while(1){

  if( $mrs['lm_name']=='首页' || $mrs['lm_name']=='论坛'){continue;}

}

break 可以接受一个可选的数字参数来决定跳出几重循环。

$arr = array('one', 'two', 'three', 'four', 'stop', 'five');
while (list (, $val) = each($arr)) {
if ($val == 'stop') {
break; /* You could also write 'break 1;' here. */
}
echo "$val
\n";
}

/* Using the optional argument. */

$i = 0;
while (++$i) {
switch ($i) {
case 5:
echo "At 5
\n";
break 1; /* Exit only the switch. */
case 10:
echo "At 10; quitting
\n";
break 2; /* Exit the switch and the while. */
default:
break;
}
}
?>