PHP基础开发代码示范

PHP基础开发代码示例～
最近打算重拾PHP来开发一些小型应用，很久没用PHP了，有些语法都生疏了，今天上午写了三个例子，基本上把之前的PHP复习了一下。

基础语法操作:

输出的方式测试
echo '###################

输出测试################
'; echo '测试输出1(单引号)
'; echo "测试塑出2(双引号)
"; ?> 输出3(=表达式)
'?> 输出4(单个表达式)
'; ?> '; $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:'.$testInt.'
'; echo '字符串型:'.$testStr.'
'; $testStr = '字符串修改了'; echo '字符串型修改后:'.$testStr.'
'; echo '字符串型修改后(2):'.$testStr2.'
'; echo '字符串型修改后(3):'.$testStr3.'
'; echo '浮点型:'.$testFloat.'
'; echo '布尔型:'.(int)$testBoolean.'
'; echo '数组测试(1):'.$testArray[0].'
'; echo '数组测试(2):'.$testArray['first'].'
'; print_r($testArray); echo '
'; foreach ($testArray as $i => $value) { echo '数组迭代结果:'.$i."->".$value."
"; } //IO操作 echo '##################IO操作####################
'; echo '读取该文件的内容:
'; $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 '

'.htmlspecialchars($contents).'

'; ?>

数据库的处理：

';

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
';
	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) . "
";
	}
	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.'
';
	$result = mysql_query($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.'
';
	$result = mysql_query($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;
}

?>

面向对象编程：

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().'
';
print_r($theUserObj);
echo '
';
echo '测试静态函数1:'.$theUserObj->testStatic().'
';
echo '测试静态函数2:'.MyUser::testStatic().'
';
echo '测试实现的接口:';
$theUserObj->start();
echo '
';

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



?>