取消设置数组后如何重新索引该数组:
echo "before deleting:<br>";
$countries[] = "Japan";
$countries[] = "Korea";
$countries[] = "china";
echo $a = count($countries);
echo "<br>";
for($i= 0;$i < $a; $i++)
{
echo "$countries[$i]<br>";
}
unset($countries[1]);
echo "<br>";
取消功能后,计数显示为2,但第二
国家名称中国没有与下面的循环相呼应.
echo "<hr>After deleting:<br>";
echo $a = count($countries);
echo "<br>";
//below is my forloop
for($i=0;$i < $a; $i++)
{
echo "$countries[$i]<br>";
}
</code>
解决方法:
使用array_values()重新索引:
$countries = array_values($countries);
但是,只需使用foreach()来迭代所有值:
foreach($countries as $country) {
echo $country;
}