PHP入门案例

<?php
/*
 * Created on 2011-3-24
 * 吕老师视频http://www.tudou.com/home/xuexi158
 * To change the template for this generated file go to
 * Window - Preferences - PHPeclipse - PHP - Code Templates
 */
//php和html标签的整合
echo "<font size=40 color=red>大学生活快没了!!!</font>";

$str="同学关系真好！";
//php中的链接操作符
echo "<br/>".$str;
//java :+

echo "<br/>===============优美的分割线=====================<br/>";
//定义数组
$arr = array("百度","搜狐","新浪");
//java:  String[] arrs = {"百度","搜狐","新浪"};new String[3];
//输出数组的内容
//echo $arr[0];
//print_r($arr);
for($i=0;$i<count($arr);$i++){
 echo $arr[$i]."<br/>";
}
echo "<br/>===============优美的分割线=====================<br/>";
foreach($arr as $v){
 echo $v.",";
}
echo "<br/>===============优美的分割线=====================<br/>";
//自定义索引的数组
$newarr = array(
"baidu"=>"百度",
"sohu"=>"搜狐",
"sina"=>"新浪"
);
foreach($newarr as $k=>$v){
 echo "健是:".$k."    值是:".$v."<br/>";
}
echo "<br/>===============优美的分割线=====================<br/>";
//while
$j=1;
while($j<=10){
 echo $j.",";
 $j++;
}
echo "<br/>===============优美的分割线=====================<br/>";
//分支语句 if switch
$week=5;
if($week==1){
 echo "星期一";
}else if($week==2){
 echo "星期二";
}else if($week==3){
 echo "星期三";
}else if($week==4){
 echo "星期四";
}else if($week==5){
 echo "星期五";
}else if($week==6){
 echo "星期六";
}else if($week==7){
 echo "星期七";
}else{
 echo "星期设置错误!";
}
echo "<br/>";
//------------------
switch($week){
 case 1:
  echo "星期一";
  break;
 case 2:
  echo "星期二";
  break;
 case 3:
  echo "星期三";
  break;
 case 4:
  echo "星期四";
  break;
 case 5:
  echo "星期五";
  break;
 case 6:
  echo "星期六";
  break;
 case 7:
  echo "星期日";
  break;
 default:
  echo "星期错误...";
}

echo "============<br/>";
echo strtotime("now"), "/n";
echo strtotime("10 September 2000"), "/n";
echo strtotime("+1 day"), "/n";
echo strtotime("+1 week"), "/n";
echo strtotime("+1 week 2 days 4 hours 2 seconds"), "/n";
echo strtotime("next Thursday"), "/n";
echo strtotime("last Monday"), "/n";
echo strtotime("-0"), "/n";
echo "<br/>";
echo date("Y-m-d");
?>