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PHP基础开发代码示范

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Release: 2016-06-13 11:00:09
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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:

<?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).'
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';?>

数据库的处理:
<?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
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checked="checked" } ?>/>查询数据测试 checked="checked" } ?>/>添加数据测试checked="checked" } ?>/>修改数据测试


面向对象编程:
<?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>';?>
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