php开发之smarty一
关于smarty的配置在这里就不说了。这里就说一下其中的两个函数。
(1) assign 方法
assign 用于在模版被执行时为模版变量赋值,语法格式如下:
{assign var =”” value =”“}
参数var为被赋值的变量名,参数value是赋给变量的值。
(2)display方法
display 用来显示模版,需要制定一个合法的模版资源的类型和路径。
语法格式如下:
void display(string template[,string cache_id[,string compile_id]])
参数cache_id 为可选参数,用于指定缓存号。参数compile_id为可选参数用于指定一个编译号。编译号可以将一个模版编译成不同的版本使用。例如,可针对不同的语言编译模版。编译号的另一个作用,如果存在多个
示例代码如下:
<code class=" hljs xml"><span class="php"><span class="hljs-preprocessor"><?php</span> <span class="hljs-comment">//定义服务器的绝对路径</span>define(<span class="hljs-string">'BASE_PATH'</span>, <span class="hljs-variable">$_SERVER</span>[<span class="hljs-string">'DOCUMENT_ROOT'</span>]);<span class="hljs-comment">//定义smarty的绝对路径</span>define(<span class="hljs-string">'SMARTY_PATH'</span>, <span class="hljs-string">'/PHPTEST/smarty/'</span>);<span class="hljs-comment">//加载Smarty的类库文件</span><span class="hljs-keyword">require</span> BASE_PATH.SMARTY_PATH.<span class="hljs-string">'Smarty.class.php'</span>;<span class="hljs-comment">//实例化一个Smarty对象</span><span class="hljs-variable">$smarty</span> = <span class="hljs-keyword">new</span> Smarty();<span class="hljs-comment">//定义各个目录的路径</span><span class="hljs-variable">$smarty</span>->template_dir =BASE_PATH.SMARTY_PATH.<span class="hljs-string">'templates/'</span>;<span class="hljs-variable">$smarty</span>->compile_dir =BASE_PATH.SMARTY_PATH.<span class="hljs-string">'templates_c/'</span>;<span class="hljs-variable">$smarty</span>->config_dir =BASE_PATH.SMARTY_PATH.<span class="hljs-string">'configs/'</span>;<span class="hljs-variable">$smarty</span>->cache_dir =BASE_PATH.SMARTY_PATH.<span class="hljs-string">'cache/'</span>;<span class="hljs-comment">//使用Smarty 赋值方法将一对名称/方法发送到模版中</span><span class="hljs-variable">$smarty</span>->assign(<span class="hljs-string">'title'</span>,<span class="hljs-string">'Jack 的第一个Smarty程序'</span>);<span class="hljs-variable">$smarty</span>->assign(<span class="hljs-string">'content'</span>,<span class="hljs-string">'Hello welcome to study Smarty'</span>);<span class="hljs-comment">//显示模版</span><span class="hljs-variable">$smarty</span>->display(<span class="hljs-string">'index.html'</span>);<span class="hljs-preprocessor">?></span></span></code>
运行结果如下:

PHPidentifiesauser'ssessionusingsessioncookiesandsessionIDs.1)Whensession_start()iscalled,PHPgeneratesauniquesessionIDstoredinacookienamedPHPSESSIDontheuser'sbrowser.2)ThisIDallowsPHPtoretrievesessiondatafromtheserver.

The security of PHP sessions can be achieved through the following measures: 1. Use session_regenerate_id() to regenerate the session ID when the user logs in or is an important operation. 2. Encrypt the transmission session ID through the HTTPS protocol. 3. Use session_save_path() to specify the secure directory to store session data and set permissions correctly.

PHPsessionfilesarestoredinthedirectoryspecifiedbysession.save_path,typically/tmponUnix-likesystemsorC:\Windows\TemponWindows.Tocustomizethis:1)Usesession_save_path()tosetacustomdirectory,ensuringit'swritable;2)Verifythecustomdirectoryexistsandiswrita

ToretrievedatafromaPHPsession,startthesessionwithsession_start()andaccessvariablesinthe$_SESSIONarray.Forexample:1)Startthesession:session_start().2)Retrievedata:$username=$_SESSION['username'];echo"Welcome,".$username;.Sessionsareserver-si

The steps to build an efficient shopping cart system using sessions include: 1) Understand the definition and function of the session. The session is a server-side storage mechanism used to maintain user status across requests; 2) Implement basic session management, such as adding products to the shopping cart; 3) Expand to advanced usage, supporting product quantity management and deletion; 4) Optimize performance and security, by persisting session data and using secure session identifiers.

The article explains how to create, implement, and use interfaces in PHP, focusing on their benefits for code organization and maintainability.

The article discusses the differences between crypt() and password_hash() in PHP for password hashing, focusing on their implementation, security, and suitability for modern web applications.

Article discusses preventing Cross-Site Scripting (XSS) in PHP through input validation, output encoding, and using tools like OWASP ESAPI and HTML Purifier.


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