PHP登入session驗證實例

介面：

<code><span>html</span>><span>head</span>><span>title</span>>Login<span><span>title</span>></span><span><span>head</span>></span><span>body</span>><span>form</span><span>name</span>=<span>"fangbei"</span><span>method</span>=<span>"post"</span><span>action</span>=<span>"check_session_login.php"</span>><span>div</span><span>style</span>=<span>"width:353"</span>><span>dl</span>><span>dt</span>><span><span>dt</span>></span><span>dd</span>><span>div</span><span>align</span>=<span>"left"</span>>
       Username:
       <span>input</span><span>type</span>=<span>"text"</span><span>name</span>=<span>"username"</span> /><span><span>div</span>></span><span><span>dd</span>></span><span>dd</span>><span>div</span><span>align</span>=<span>"left"</span>>
       Password : 
       <span>input</span><span>type</span>=<span>"password"</span><span>name</span>=<span>"pwd"</span> /><span><span>div</span>></span><span><span>dd</span>></span><span>dd</span>><span>p</span><span>align</span>=<span>"center"</span>><span>input</span><span>type</span>=<span>"submit"</span><span>name</span>=<span>"Submit"</span><span>value</span>=<span>"Submit"</span> /><span>input</span><span>type</span>=<span>"reset"</span><span>name</span>=<span>"Reset"</span><span>value</span>=<span>"Reset"</span> /><span><span>p</span>></span><span><span>dd</span>></span><span><span>dl</span>></span><span><span>div</span>></span><span><span>form</span>></span><span><span>body</span>></span><span><span>html</span>></span></code>

資料庫準備：

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username	pwd	userflag
	<code><span><span><?php </span> header(<span>"Content-Type: text/html; charset=utf-8"</span>); <span>$servername</span>=<span>"localhost"</span>; <span>$username</span> = <span>"root"</span>; <span>$password</span> = <span>""</span>; <span>$dbname</span> = <span>"paul"</span>; <span>$conn</span> = <span>new</span> mysqli(<span>$servername</span>, <span>$username</span>, <span>$password</span>, <span>$dbname</span>); <span>if</span> (<span>$conn</span>->connect_error) { <span>die</span>(<span>"Connection failed: "</span> . <span>$conn</span>->connect_error); } <span>$conn</span>->query(<span>"SET NAMES utf8"</span>); <span>//获取输入的信息</span><span>$username</span> = <span>$_POST</span>[<span>'username'</span>]; <span>$pwd</span> = <span>$_POST</span>[<span>'pwd'</span>]; <span>//获取session的值</span><span>$sql</span> = <span>"select username,userflag from test_login where username = '$username' and pwd = '$pwd'"</span>; <span>$result</span> = <span>$conn</span>->query(<span>$sql</span>); <span>//判断用户以及密码</span><span>if</span> (<span>$result</span>->num_rows > <span>0</span>) { session_start(); <span>//判断权限</span><span>$row</span> = <span>$result</span>->fetch_assoc(); <span>if</span>(<span>$row</span>[<span>'userflag'</span>] == <span>1</span><span>or</span><span>$row</span>[<span>'userflag'</span>] == <span>0</span>){ <span>$_SESSION</span>[<span>'username'</span>] = <span>$row</span>[<span>'username'</span>]; <span>$_SESSION</span>[<span>'userflag'</span>] = <span>$row</span>[<span>'userflag'</span>]; <span>echo</span><span>"<a href="welcome_session_login.php">欢迎访问</a>"</span>; } <span>else</span>{ <span>echo</span><span>"迷之用户"</span>; } } <span>else</span>{ <span>echo</span><span>"用户名或密码不正确"</span>; } </span></span></code>	<code><span><?php </span> header(<span>"Content-Type: text/html; charset=utf-8"</span>); session_start(); <span>if</span>(<span>isset</span>(<span>$_SESSION</span>[<span>'username'</span>])) { <span>if</span>(<span>$_SESSION</span>[<span>'userflag'</span>] == <span>1</span>) <span>echo</span><span>"欢迎管理员"</span>.<span>$_SESSION</span>[<span>'username'</span>].<span>"登录"</span>; <span>if</span>(<span>$_SESSION</span>[<span>'userflag'</span>] == <span>0</span>) <span>echo</span><span>"欢迎用户"</span>.<span>$_SESSION</span>[<span>'username'</span>].<span>"登录"</span>; } <span>else</span> { <span>echo</span><span>"登录已过期"</span>; } <span>unset</span>(<span>$_SESSION</span>[<span>'username'</span>]); <span>unset</span>(<span>$_SESSION</span>[<span>'pwd'</span>]); <span>unset</span>(<span>$_SESSION</span>[<span>'userflag'</span>]); <span>echo</span><span>"<br>会话结束"</span>;</span></code>

以上就介紹了PHP登入session驗證實例，包含了方面的內容，希望對PHP教程有興趣的朋友有幫助。