PHP基础开发代码示范

<?php
//输出的方式测试
echo '###################输出测试################<br>';
echo '测试输出1(单引号)<br>';
echo "测试塑出2(双引号)<br>";
?>
<?='测试输出3(=表达式)<br>'?>
<? echo '测试输出4(单个表达式)<br>'; ?>

<?php 
//类型
echo '###################类型测试################<br>';
$testInt = 1;
$testStr = "字符串";
$testFloat = 1.23;
$testBoolean = false; //false/true:如果转换成字符串则为空/"1"，转换成整型则为0/1
$testArray = array("first"=>1,2,3,4,5);
$testStr2 = $testStr; //testStr修改，testStr2不会修改
$testStr3 = &$testStr; //testStr修改，testStr3也会修改

echo '整型:'.$testInt.'<br>';
echo '字符串型:'.$testStr.'<br>';
$testStr = '字符串修改了';
echo '字符串型修改后:'.$testStr.'<br>';
echo '字符串型修改后(2):'.$testStr2.'<br>';
echo '字符串型修改后(3):'.$testStr3.'<br>';

echo '浮点型:'.$testFloat.'<br>';
echo '布尔型:'.(int)$testBoolean.'<br>';
echo '数组测试(1):'.$testArray[0].'<br>';
echo '数组测试(2):'.$testArray['first'].'<br>';
print_r($testArray);
echo '<br>';
foreach ($testArray as $i => $value) {
    echo '数组迭代结果:'.$i."->".$value."<br>";
}

//IO操作
echo '##################IO操作####################<br>';
echo '读取该文件的内容:<br>';
$theFileName = "test_base.php"; //文件名称或者全路径
$handle = fopen ($theFileName, "rb");
$contents = fread ($handle, filesize ($theFileName));
fclose ($handle); 
echo '<div style="border:1px solid #aaa;color:blue;"><pre class="brush:php;toolbar:false;">'.htmlspecialchars($contents).'

<?php

//四种引用方式
//require 'test_base.php'; //无条件的引用,报错会终止应用,引用的文件只处理一次
//require_once 'test_base.php'; //无条件的引用,报错会终止应用,引用的文件只处理一次并只显示一次
//include 'test_base.php'; //可有条件的引用,报错不会终止应用,引用的文件处理多次
//include_once 'test_base.php'; //可有条件的引用,报错不会终止应用,引用的文件处理多次但只显示一次

//数据库的测试
$hostname = '192.168.1.6'; /*数据库服务器访问地址*/
$username = 'root'; /*数据库用户帐号*/
$password = 'root'; /*数据库密码*/
$database = 'phptest'; /*数据库名称*/
$databaseCharset = 'GBK'; /*数据库编码,防止插入中文乱码和报错*/

//获取请求信息
$actionSubmit = $_REQUEST['submit'];
$reqTheType = $_REQUEST['theType'];
if($reqTheType == null || $reqTheType == '') {
	$reqTheType = '1';
}
echo '请求信息:'.$actionSubmit."|".$reqTheType.'<br>';

if($actionSubmit != null && $actionSubmit != '') {
	if($reqTheType == '1') {
		testSearch();
	}
	if($reqTheType == '2') {
		testInsert();
		testSearch();
	}
	if($reqTheType == '3') {
		testUpdate();
		testSearch();
	}
}

/**
 * 数据库查询
 * Enter description here ...
 */
function testSearch() {
	echo '查询数据<br>';
	global $hostname,$username,$password,$database,$databaseCharset;
	
	$currentConn = null;
	$currentConn = mysql_connect ( $hostname, $username, $password );
	mysql_select_db ( $database );
	mysql_query("set names charset ".$databaseCharset);
	mysql_query("set names ".$databaseCharset);
	$result = mysql_query ( "select * from e_user" ); //查询动作返回的是result结果集
	while ( $row = mysql_fetch_object ( $result ) ) {
		echo $row->uri . "\t" . ($row->username) . "<br>";
	}
	mysql_free_result ( $result );
	mysql_close ( $currentConn );
}

/**
 * 数据库数据添加
 * Enter description here ...
 */
function testInsert() {
	global $hostname,$username,$password,$database,$databaseCharset;
	$insertSql = "insert into e_user(uri,username,password) values";
	$insertSql .= "(";
	$insertSql .= "'".generateId()."','测试用户','123456'";
	$insertSql .= ")";
	$currentConn = null;
	$currentConn = mysql_connect ( $hostname, $username, $password );
	mysql_select_db ( $database );
	mysql_query("set names charset ".$databaseCharset);
	mysql_query("set names ".$databaseCharset);
	echo '添加数据'.$insertSql.'<br>';
	$result = mysql_query($insertSql); //插入动作返回的是boolean
	if(!$result) {
		die('Error: ' . mysql_error());
	}
	mysql_close ( $currentConn );
}

/**
 * 数据库修改
 * Enter description here ...
 */
function testUpdate() {
	global $hostname,$username,$password,$database,$databaseCharset;
	$updateSql = "update e_user";
	$updateSql .= " set username='修改后的用户名称' where uri = '001'";
	$currentConn = null;
	$currentConn = mysql_connect ( $hostname, $username, $password );
	mysql_select_db ( $database );
	mysql_query("set names charset ".$databaseCharset);
	mysql_query("set names ".$databaseCharset);
	echo '修改数据'.$updateSql.'<br>';
	$result = mysql_query($updateSql); //插入动作返回的是boolean
	if(!$result) {
		die('Error: ' . mysql_error());
	}
	mysql_close ( $currentConn );
}

/**
 * 自动生成ID号
 * @param unknown_type $count
 */
function generateId($count = 6) {
	$resultId = '';
	for($i=0;$i<$count;$i++) {
		$resultId .= (string)rand(0, 9);
	}
	return $resultId;
}

?>

<form>
<input type="radio" name="theType" value="1" <? if($reqTheType == '1') {?>checked="checked"<? } ?>/>查询数据测试 
<input type="radio" name="theType" value="2" <? if($reqTheType == '2') {?>checked="checked"<? } ?>/>添加数据测试
<input type="radio" name="theType" value="3" <? if($reqTheType == '3') {?>checked="checked"<? } ?>/>修改数据测试 
<input type="submit" name="submit" value="提交" /></form>

<?php

//基础的抽象用户类
abstract class BaseUser {
	protected $flag = 0;
	abstract function showInfo();
}

//接口类
interface Module {
	function start();
	function stop();
}

//测试PHP类和对象
class MyUser extends BaseUser implements Module {
	/*成员变量*/
	private $uri = '';
	private $type = '';
	protected $username = '';
	public $password = '';
	
	/*静态变量*/
	const USER_TYPE_NORMAL = "normal";
	
	/*构造函数*/
	function __construct($uri = '',$username = '', $password = '') {
		$this->uri = $uri;
		$this->username = $username;
		$this->password = $password;
		$this->flag = '100';
		$this->type = self::USER_TYPE_NORMAL;
	}
	
	/*测试静态函数的处理*/
	static function testStatic() {
		//$this->username = 'static'; //该方法是错误的,静态方法中只能操作静态变量
		return self::USER_TYPE_NORMAL;
	}
	
	/*get set 方法用于管理内部的字段属性*/
	public function getUri() {
		return $this->uri;
	}
	public function getUsername() {
		return $this->username;
	}
	public function getPassword() {
		return $this->password;
	}
	public function setUri($uri) {
		$this->uri = $uri;
	}
	public function setUsername($username) {
		$this->username = $username;
	}
	public function setPassword($password) {
		$this->password = $password;
	}
	public function getType() {
		return $this->type;
	}
	public function setType($type) {
		$this->type = $type;
	}
	
	
	/*实现底层的抽象方法*/
	function showInfo() {
		echo '我是MyUser对象.';
	}
	
	//实现接口方法
	public function start() {
		echo '启动MyUser对象....';
	}
	
	//实现接口方法
	public function stop() {
		echo '停止MyUser对象....';	
	}


}

//扩展自MyUser的类
class MyExtendUser extends MyUser implements Module {
	
	/*覆盖父类的构造函数*/
	function __construct($uri = '',$username = '', $password = '') {
		//调用父类的构造函数
		parent::__construct($uri,$username,$password);
		
		//实现自己的一些初始化动作
		$this->flag = '200';
	}
	
	/*覆盖父类的getUsername方法*/
	public function getUsername() {
		return '继承自MyUser,'.$this->username;
	}
	
	//实现接口方法
	public function start() {
		echo '启动MyExtendUser对象....';
	}
	
	//实现接口方法
	public function stop() {
		echo '停止MyExtendUser对象....';	
	}
}

//测试用户对象
$theUserObj = new MyUser('001','测试用户1','123');
echo '用户名称:'.$theUserObj->getUsername().'<br>';
print_r($theUserObj);
echo '<br>';
echo '测试静态函数1:'.$theUserObj->testStatic().'<br>';
echo '测试静态函数2:'.MyUser::testStatic().'<br>';
echo '测试实现的接口:';
$theUserObj->start();
echo '<br>';

//测试继承
$theUserObj2 = new MyExtendUser('002','测试用户2','123');
echo '用户名称2(继承):'.$theUserObj2->getUsername().'<br>';
print_r($theUserObj2);
echo '<br>';
echo '测试实现的接口2:';
$theUserObj2->start();
echo '<br>';



?>