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锁定老帖子 主题：php基础
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发表时间：2011-12-15
最后修改：2011-12-15
第一次接触PHP 记录一下。
环境：appSer包(打包的php,mySQL,apache)；地址www.AppServNetwork.com； 目录：在www目录下发现了index.php 这里应该就是根目录吧。 资料：打开网页 www.w3school.com.cn/php 进行参考； 工具：文本编辑器EdiPlus开始尝试； IE打开地址： localhost/index.php 以下是练习代码： 基础
<html>
<head>
<title>jack's hello world!</title>
<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\">
<?php
//基础
function testBase(){
$name="jack";
$content="hello world!";
$num1="2";
$num2="3";
//循环
echo "循环while"."<br>";
$num="1";
while($num<=10){
echo "number++:".$num."<br>";
$num++;
}
echo "循环for<br>";
for($n=11;$n>=$num;$n--){
echo "number--:".$num."<br>";
$num--;
if($num<=0){
break;
}
}
//数组
$arr=array($name,$content);
echo "arrayList>>".$arr[0]." say: ".$arr[1]."<br>";
$hashMap=array("name"=>$name,"content"=>$content);
echo "hashMap>>".$hashMap['name']." say: ".$hashMap['content']."<br>";
$cllection=array(
"list"=>$arr,
"map"=>$hashMap
);
echo "collection:".$cllection['map']['name']."<br>";
echo "collection2:".$cllection['list'][1]."<br>";
//等比较
if($num1!=$num2){
echo "等比较>>$num1 != $num2<<"."<br>";
}
if($name!=$content){
echo "等比较>>$name != $content<<"."<br>";
}
//运算及简单str函数
echo "运算>>$num1 * $num2<<".($num1 * $num2)."<br>";
echo $content."函数>>strLen= ". strLen($content)."<br>";
echo $content."函数>>strPos(hello world!,!)= ". strPos($content,"!")."<br>";
}
?>
<?php
//表单处理
function testForm(){
//method="get" 明显的好处是可以加标签收藏网页(虽然没做过这个功能)
echo "name:".$_REQUEST["name"]."<br>";
echo "content:".$_REQUEST["content"];
echo '<form name="form1" action="jack.php" method="post">';
echo 'name<input name="name" />';
echo 'content<input name="content" />';
echo '<button type="submit" name="sub" >提交</button>';
echo '</form>';
}
?>
<?php
//日期
function testDate(){
echo date("Y-m-d")."<br>";
//mktime() 函数可为指定的日期返回 Unix 时间戳。 mktime(hour,minute,second,month,day,year);
$tomorrow=mktime(0,0,0,date("m"),date("d")+1,date("Y"));
echo "tomorrow is ".date("Y-m-d",$tomorrow);
}
?>
<?php
//引用
function testInclude(){
require("sayHi.php");//推荐，如果出现错误则不执行下列代码
//include("sayHi.php");
echo "echo!";
sayHi("jack");
}
?>
<?php
//文件上传
function testFile(){
echo '<form action="upload_file.php" method="post"
enctype="multipart/form-data"><?php //enctype="multipart/form-data" 二进制数据提交 ?>
<label for="file">Filename:</label>
<input type="file" name="file" id="file" />
<br />
<input type="submit" name="submit" value="Submit" />
</form>';
}
?>
<?php
//会话session
function testSession(){
//session_start();//启动
$_SESSION['name']="jack";
echo $_SESSION['name'];
unset($_SESSION['name']);//注销指定session
//session_destroy();//注销所有session
echo $_SESSION['name'];
}
?>
<?php
//错误处理
die("错误!");
echo "ss";
//错误处理机制
//...
?>
<?php
//异常
function checkNum($number)
{
if($number>1)
{
throw new Exception("Value must be 1 or below");
}
return true;
}
//在 "try" 代码块中触发异常
try
{
checkNum(2);
//If the exception is thrown, this text will not be shown
echo 'If you see this, the number is 1 or below';
}
//捕获异常
catch(Exception $e)
{
echo 'Message: ' .$e->getMessage();
}
?>
<?php
//Filter ???
?>
</body>
</html>
文件上传类
<?php
if ($_FILES["file"]["error"] > 0)
{
echo "Error: " . $_FILES["file"]["error"] . "<br />";
}
else
{
echo "Upload: " . $_FILES["file"]["name"] . "<br />";
echo "Type: " . $_FILES["file"]["type"] . "<br />";
echo "Size: " . ($_FILES["file"]["size"] / 1024) . " Kb<br />";
echo "Stored in: " . $_FILES["file"]["tmp_name"]."<br>";
//把文件复制到upload/文件夹下
if (file_exists("upload/" . $_FILES["file"]["name"]))
{
echo $_FILES["file"]["name"] . " already exists. ";
}
else
{
move_uploaded_file($_FILES["file"]["tmp_name"],
"upload/" . $_FILES["file"]["name"]);
echo "Stored in: " . "upload/" . $_FILES["file"]["name"];
}
}
?>
操作数据库
<?php
//创建连接
function getConn(){
$con = mysql_connect("localhost","root","root");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
echo $con;
}
//mysql_close($con);//关闭连接
?>
<?php
//创建数据库，表，关联，及测试数据
function createDB(){
$con = mysql_connect("localhost","root","root");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
//my_db 创建数据库
if (mysql_query("CREATE DATABASE my_db",$con))
{
echo "Database created";
}
else
{
echo "Error creating database: " . mysql_error();
}
//创建表
mysql_select_db("my_db", $con);//在创建表之前，必须首先选择数据库。通过 mysql_select_db() 函数选取数据库
$sql = "CREATE TABLE Persons
(
FirstName varchar(15),
LastName varchar(15),
Age int
)";
mysql_query($sql,$con);
//建立关联
$sql = "CREATE TABLE Persons
(
personID int NOT NULL AUTO_INCREMENT,
PRIMARY KEY(personID),
FirstName varchar(15),
LastName varchar(15),
Age int
)";
mysql_query($sql,$con);
//插入值
mysql_select_db("my_db", $con);
mysql_query("INSERT INTO Persons (FirstName, LastName, Age)
VALUES ('Peter', 'Griffin', '35')");
//关闭连接
mysql_close($con);
}
?>
<?php
//插入值
function insert($firstname,$lastname,$age){
$con = mysql_connect("localhost","root","root");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("my_db", $con);//选定数据库
$sql="INSERT INTO Persons (FirstName, LastName, Age)
VALUES
('$firstname','$lastname','$age')";
if (!mysql_query($sql,$con)) //执行SQL
{
die('Error: ' . mysql_error());
}
echo "1 record added";
mysql_close($con);
}
?>
<?php
//查询
function select(){
$con = mysql_connect("localhost","root","root");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("my_db", $con);
$result = mysql_query("SELECT * FROM Persons");
while($row = mysql_fetch_array($result))
{
echo "|".$row['FirstName'] . "|" . $row['LastName']."|".$row['Age']."|";
echo "<br />";
}
mysql_close($con);
}
?>
<?php
//表单处理
function testForm(){
//method="get" 明显的好处是可以加标签收藏网页(虽然没做过这个功能)
if($_REQUEST["firstname"]!=""){
insert($_POST[firstname],$_POST[lastname],$_POST[age]);
}
echo '<form name="form1" action="phpMySQL.php" method="post">';
echo 'firstname<input name="firstname" />';
echo 'lastname<input name="lastname" />';
echo 'age<input name="age" />';
echo '<button type="submit" name="sub" >提交</button>';
echo '</form>';
}
?>
<html>
<body>
<?php
testForm();
?>
<?php select();//怎么实现点击查询事件 ?>
</body>
</html>
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