Question

PHP foreach语句如何控制循环次数？下面程序那里不对？

<?php
$state = array("one","two","three");
print_r($state);
echo "<br/>";
array_unshift($state,"zero","right");
foreach($state as $states) //如何限制FOREACH的循环次数？
{
vprintf(" %s %s %s %s %s",$state);
}
echo "<br/>";
array_push($state,"four","five");
print_r($state);
?>
输出结果
Array ( [0] => one [1] => two [2] => three )
zero right one two
threezero right one two threezero right one two threezero right one two
threezero right one two three //这里我只想让输出 zero right one two three 而为什么程序循环了5次？求解
Array ( [0] => zero [1] => right [2]
=> one [3] => two [4] => three [5] => four [6] => five )
这里第二步我只想让输出 zero right one two three 而为什么程序循环输出了5次？求解

Answer 1

循环里面默认的循环次数就是你的数组长度，如果想不输出那么多就用for循环把长度改小
用froeach 也能实现, 在循环外定义$i = 0; 再在循环里累加 然后做判断就OK, 条条道路通罗马！
自己多想下！注意细节,
亲, 你的程序把参数搞错啦!

Answer 2

foreach($state as $states)
{
vprintf(" %s %s %s %s %s",$state);
}
你这个语句出问题了。请看清楚参数。你这是把$state作为参数！肯定会重复打印$state五次。
改成：
foreach($state as $states)
{
echo $states.' ';
}
就行了~

Answer 3

foreach($state as $states) //如何限制FOREACH的循环次数？
{
printf(" %s",$states);
}

Answer 4

333333333333333

Answer 5

看基础手册先吧