if 语句
$m = 2;
$n = 2;
if ($m > $n)
{
echo "m";
}
elseif ($m < $n)
{
echo "n";
}
else
{
echo "mn";
}
判断相等用“==”。
switch 语句
$m = 3;
switch ($m)
{
case 1:
echo "a";
break;
case 2:
echo "b";
break;
default:
echo "-";
break;
}
for 语句
for ($i = 0; $i < 3; $i++)
{
echo $i, "<br>";
}
while 语句
$i = 0;
while ($i < 3)
{
echo $i, "<br>";
$i++;
}
do while 语句
do
{
echo $i, "<br>";
$i++;
}
while ($i < 3);
foreach 语句
$arr = array(0, 1, 2);
foreach ($arr as $e)
{
echo $e, "<br>";
}
foreach 语句和其他一些语言的语法不同，注意。
