php基础

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php mysql php基础

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 这里应该就是跟目录吧。
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

一下是练习代码：

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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