$a=”word”;
echo strlen($a);
echo strpos($a,”word”);
define(“NAME”,”MIA”,true);
define(“NAME”,”MIA”,false);
echo NAME;
$a1=2;$a2=3;$a1++;
echo($a1);
$txt1=”hello”; $txt2=”world!”;$txt2=$txt1.”world”;$txt1.=$txt2;
echo($txt1);
echo”$txt1,$txt2″;
$x=100;$y=”100″;
var_dump($x==$y);
var_dump($x===$y);
$ar=array(“a”,”b”);
$ar2=array(“c”,”d”);
$ar4=$ar + $ar2;
var_dump($ar4);
$t=date(“H”);
if($t>”20″)
{echo “have a good day!”;}
else{ echo”have a good night!”;}
$x=3;
switch($x)
{ case 1:
echo”number 1″;
break;
case 2:
echo”number 2″;
break;
default:
echo”number between”;
break;
};
while($x<6)
{
echo”这是一个可以的数:$x”;
$x++;
}
$num=false;
do{
$x++;
echo “this is $x”;
if($x>10)
{
$num=true;
}
}while($num==false);
for($i=0;$i<10;$i++)
{
echo”this is number$i\n”;
}
foreach($ar as $value)
{
echo”this value is $value\n”;
}