PHP的一个会话(Session)包装类代码,PHP代码库,德仔网

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【PHP】 PHP的一个会话(Session)包装类
作者: / 发布于2011/1/4/ 569
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            <pre style="line-height: 150%; font-family: Verdana, Monospace; font-size: 12px; font-weight: bold; margin-right: 10px"><span style="color: #0000ff"><?php</span>

<span style="font-style: italic; color: #666666">// Example of usage below the code</span>

<span style="color: #0000ff">class</span> Session <span style="color: #009900">{</span>

    <span style="font-style: italic; color: #666666">// To permit the same session var being accessed</span>
    <span style="font-style: italic; color: #666666">// more than once at same time on different places.</span>
    <span style="color: #0000ff">var</span> <span style="color: #000088">$prefix</span><span style="color: #339933">;</span>

    <span style="color: #0000ff">function</span> Session<span style="color: #009900">(</span><span style="color: #009900">)</span> <span style="color: #009900">{</span>
        <span style="color: blue">session_start</span><span style="color: #009900">(</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
        <span style="color: #000088">$this</span><span style="color: #339933">-></span><span style="color: #004000">prefix</span> <span style="color: #339933">=</span> <span style="color: #000088">$_SERVER</span><span style="color: #009900">[</span><span style="color: #0000ff">'HTTP_HOST'</span><span style="color: #009900">]</span><span style="color: #339933">;</span>
        
        <span style="color: #0099cc">if</span><span style="color: #009900">(</span><span style="color: #000088">$this</span><span style="color: #339933">-></span><span style="color: #004000">get</span><span style="color: #009900">(</span><span style="color: #0000ff">'flash'</span><span style="color: #009900">)</span><span style="color: #009900">)</span> <span style="color: #009900">{</span>
            <span style="color: #0099cc">foreach</span><span style="color: #009900">(</span><span style="color: #000088">$_SESSION</span><span style="color: #009900">[</span><span style="color: #000088">$this</span><span style="color: #339933">-></span><span style="color: #004000">prefix</span><span style="color: #009900">]</span><span style="color: #009900">[</span><span style="color: #0000ff">'flash'</span><span style="color: #009900">]</span> <span style="color: #0099cc">as</span> <span style="color: #000088">$name</span><span style="color: #339933">=></span><span style="color: #000088">$vals</span><span style="color: #009900">)</span> <span style="color: #009900">{</span>
                <span style="color: #339933">++</span><span style="color: #000088">$_SESSION</span><span style="color: #009900">[</span><span style="color: #000088">$this</span><span style="color: #339933">-></span><span style="color: #004000">prefix</span><span style="color: #009900">]</span><span style="color: #009900">[</span><span style="color: #0000ff">'flash'</span><span style="color: #009900">]</span><span style="color: #009900">[</span><span style="color: #000088">$name</span><span style="color: #009900">]</span><span style="color: #009900">[</span><span style="color: #0000ff">'counter'</span><span style="color: #009900">]</span><span style="color: #339933">;</span>
                <span style="color: #0099cc">if</span><span style="color: #009900">(</span><span style="color: #000088">$_SESSION</span><span style="color: #009900">[</span><span style="color: #000088">$this</span><span style="color: #339933">-></span><span style="color: #004000">prefix</span><span style="color: #009900">]</span><span style="color: #009900">[</span><span style="color: #0000ff">'flash'</span><span style="color: #009900">]</span><span style="color: #009900">[</span><span style="color: #000088">$name</span><span style="color: #009900">]</span><span style="color: #009900">[</span><span style="color: #0000ff">'counter'</span><span style="color: #009900">]</span><span style="color: #339933">></span><span style="color: #cc66cc">1</span><span style="color: #009900">)</span> <span style="color: #009900">{</span>
                    <span style="color: blue">unset</span><span style="color: #009900">(</span><span style="color: #000088">$_SESSION</span><span style="color: #009900">[</span><span style="color: #000088">$this</span><span style="color: #339933">-></span><span style="color: #004000">prefix</span><span style="color: #009900">]</span><span style="color: #009900">[</span><span style="color: #0000ff">'flash'</span><span style="color: #009900">]</span><span style="color: #009900">[</span><span style="color: #000088">$name</span><span style="color: #009900">]</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
                <span style="color: #009900">}</span>
            <span style="color: #009900">}</span>
        <span style="color: #009900">}</span>
    <span style="color: #009900">}</span>
    
    <span style="color: #0000ff">function</span> get<span style="color: #009900">(</span><span style="color: #000088">$session_var</span><span style="color: #009900">)</span> <span style="color: #009900">{</span>
        <span style="color: #0099cc">return</span> <span style="color: #009900">(</span><span style="color: #009900">(</span><span style="color: blue">isset</span><span style="color: #009900">(</span><span style="color: #000088">$_SESSION</span><span style="color: #009900">[</span><span style="color: #000088">$this</span><span style="color: #339933">-></span><span style="color: #004000">prefix</span><span style="color: #009900">]</span><span style="color: #009900">[</span><span style="color: #000088">$session_var</span><span style="color: #009900">]</span><span style="color: #009900">)</span><span style="color: #009900">)</span> ? <span style="color: #000088">$_SESSION</span><span style="color: #009900">[</span><span style="color: #000088">$this</span><span style="color: #339933">-></span><span style="color: #004000">prefix</span><span style="color: #009900">]</span><span style="color: #009900">[</span><span style="color: #000088">$session_var</span><span style="color: #009900">]</span> <span style="color: #339933">:</span> <span style="color: #009900; font-weight: bold">false</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
    <span style="color: #009900">}</span>
    
    <span style="color: #0000ff">function</span> get_cookie<span style="color: #009900">(</span><span style="color: #000088">$cookie_name</span><span style="color: #009900">)</span> <span style="color: #009900">{</span>
        <span style="color: #0099cc">return</span> <span style="color: #009900">(</span><span style="color: #009900">(</span><span style="color: blue">isset</span><span style="color: #009900">(</span><span style="color: #000088">$_COOKIE</span><span style="color: #009900">[</span><span style="color: #000088">$cookie_name</span><span style="color: #009900">]</span><span style="color: #009900">)</span><span style="color: #009900">)</span> ? <span style="color: #000088">$_COOKIE</span><span style="color: #009900">[</span><span style="color: #000088">$cookie_name</span><span style="color: #009900">]</span> <span style="color: #339933">:</span> <span style="color: #009900; font-weight: bold">false</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
    <span style="color: #009900">}</span>
    
    <span style="color: #0000ff">function</span> set<span style="color: #009900">(</span><span style="color: #000088">$session_var</span><span style="color: #339933">,</span><span style="color: #000088">$value</span><span style="color: #009900">)</span> <span style="color: #009900">{</span>
        <span style="color: #000088">$_SESSION</span><span style="color: #009900">[</span><span style="color: #000088">$this</span><span style="color: #339933">-></span><span style="color: #004000">prefix</span><span style="color: #009900">]</span><span style="color: #009900">[</span><span style="color: #000088">$session_var</span><span style="color: #009900">]</span> <span style="color: #339933">=</span> <span style="color: #000088">$value</span><span style="color: #339933">;</span>
    <span style="color: #009900">}</span>
    
    <span style="color: #0000ff">function</span> set_cookie<span style="color: #009900">(</span><span style="color: #000088">$cookie_name</span><span style="color: #339933">,</span><span style="color: #000088">$value</span><span style="color: #009900">)</span> <span style="color: #009900">{</span>
        <span style="color: blue">setcookie</span><span style="color: #009900">(</span><span style="color: #000088">$cookie_name</span><span style="color: #339933">,</span><span style="color: #000088">$value</span><span style="color: #339933">,</span><span style="color: blue">time</span><span style="color: #009900">(</span><span style="color: #009900">)</span><span style="color: #339933">+</span><span style="color: #cc66cc">3600</span><span style="color: #339933">*</span><span style="color: #cc66cc">24</span><span style="color: #339933">,</span><span style="color: #0000ff">'/'</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
    <span style="color: #009900">}</span>
    
    <span style="color: #0000ff">function</span> del<span style="color: #009900">(</span><span style="color: #009900">)</span> <span style="color: #009900">{</span>
        <span style="color: #000088">$session_vars</span> <span style="color: #339933">=</span> <span style="color: blue">func_get_args</span><span style="color: #009900">(</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
        <span style="color: #0099cc">foreach</span><span style="color: #009900">(</span><span style="color: #000088">$session_vars</span> <span style="color: #0099cc">as</span> <span style="color: #000088">$session_var</span><span style="color: #009900">)</span> <span style="color: #009900">{</span>
            <span style="color: #0099cc">if</span><span style="color: #009900">(</span><span style="color: #000088">$this</span><span style="color: #339933">-></span><span style="color: #004000">get</span><span style="color: #009900">(</span><span style="color: #000088">$session_var</span><span style="color: #009900">)</span><span style="color: #339933">||</span>is_array<span style="color: #009900">(</span><span style="color: #000088">$this</span><span style="color: #339933">-></span><span style="color: #004000">get</span><span style="color: #009900">(</span><span style="color: #000088">$session_var</span><span style="color: #009900">)</span><span style="color: #009900">)</span><span style="color: #009900">)</span> <span style="color: #009900">{</span>
                <span style="color: blue">unset</span><span style="color: #009900">(</span><span style="color: #000088">$_SESSION</span><span style="color: #009900">[</span><span style="color: #000088">$this</span><span style="color: #339933">-></span><span style="color: #004000">prefix</span><span style="color: #009900">]</span><span style="color: #009900">[</span><span style="color: #000088">$session_var</span><span style="color: #009900">]</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
            <span style="color: #009900">}</span>
        <span style="color: #009900">}</span>
    <span style="color: #009900">}</span>
    
    <span style="color: #0000ff">function</span> del_cookie<span style="color: #009900">(</span><span style="color: #009900">)</span> <span style="color: #009900">{</span>
        <span style="color: #000088">$cookies</span> <span style="color: #339933">=</span> <span style="color: blue">func_get_args</span><span style="color: #009900">(</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
        <span style="color: #0099cc">foreach</span><span style="color: #009900">(</span><span style="color: #000088">$cookies</span> <span style="color: #0099cc">as</span> <span style="color: #000088">$cookie</span><span style="color: #009900">)</span> <span style="color: #009900">{</span>
            <span style="color: #0099cc">if</span><span style="color: #009900">(</span><span style="color: #000088">$this</span><span style="color: #339933">-></span><span style="color: #004000">get_cookie</span><span style="color: #009900">(</span><span style="color: #000088">$cookie</span><span style="color: #009900">)</span><span style="color: #009900">)</span> <span style="color: #009900">{</span>
                <span style="color: blue">setcookie</span><span style="color: #009900">(</span><span style="color: #000088">$cookie</span><span style="color: #339933">,</span><span style="color: #0000ff">'del'</span><span style="color: #339933">,</span><span style="color: blue">time</span><span style="color: #009900">(</span><span style="color: #009900">)</span><span style="color: #339933">-</span><span style="color: #cc66cc">3600</span><span style="color: #339933">,</span><span style="color: #0000ff">'/'</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
            <span style="color: #009900">}</span>
        <span style="color: #009900">}</span>
    <span style="color: #009900">}</span>
    
    <span style="color: #0000ff">function</span> flash<span style="color: #009900">(</span><span style="color: #000088">$flash_var</span><span style="color: #339933">,</span><span style="color: #000088">$value</span><span style="color: #009900">)</span> <span style="color: #009900">{</span>
        <span style="color: #000088">$_SESSION</span><span style="color: #009900">[</span><span style="color: #000088">$this</span><span style="color: #339933">-></span><span style="color: #004000">prefix</span><span style="color: #009900">]</span><span style="color: #009900">[</span><span style="color: #0000ff">'flash'</span><span style="color: #009900">]</span><span style="color: #009900">[</span><span style="color: #000088">$flash_var</span><span style="color: #009900">]</span> <span style="color: #339933">=</span> <span style="color: blue">array</span><span style="color: #009900">(</span><span style="color: #0000ff">'val'</span><span style="color: #339933">=></span><span style="color: #000088">$value</span><span style="color: #339933">,</span><span style="color: #0000ff">'counter'</span><span style="color: #339933">=></span><span style="color: #cc66cc">0</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
    <span style="color: #009900">}</span>
    
    <span style="color: #0000ff">function</span> get_flash<span style="color: #009900">(</span><span style="color: #000088">$flash_var</span><span style="color: #009900">)</span> <span style="color: #009900">{</span>
        <span style="color: #0099cc">return</span> <span style="color: #009900">(</span><span style="color: #009900">(</span><span style="color: blue">isset</span><span style="color: #009900">(</span><span style="color: #000088">$_SESSION</span><span style="color: #009900">[</span><span style="color: #000088">$this</span><span style="color: #339933">-></span><span style="color: #004000">prefix</span><span style="color: #009900">]</span><span style="color: #009900">[</span><span style="color: #0000ff">'flash'</span><span style="color: #009900">]</span><span style="color: #009900">[</span><span style="color: #000088">$flash_var</span><span style="color: #009900">]</span><span style="color: #009900">[</span><span style="color: #0000ff">'val'</span><span style="color: #009900">]</span><span style="color: #009900">)</span><span style="color: #009900">)</span> ? <span style="color: #000088">$_SESSION</span><span style="color: #009900">[</span><span style="color: #000088">$this</span><span style="color: #339933">-></span><span style="color: #004000">prefix</span><span style="color: #009900">]</span><span style="color: #009900">[</span><span style="color: #0000ff">'flash'</span><span style="color: #009900">]</span><span style="color: #009900">[</span><span style="color: #000088">$flash_var</span><span style="color: #009900">]</span><span style="color: #009900">[</span><span style="color: #0000ff">'val'</span><span style="color: #009900">]</span> <span style="color: #339933">:</span> <span style="color: #009900; font-weight: bold">false</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
    <span style="color: #009900">}</span>

<span style="color: #009900">}</span>

<span style="color: #000000; font-weight: bold">?></span></pre>
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            <pre style="line-height: 150%; font-family: Verdana, Monospace; font-size: 12px; font-weight: bold; margin-right: 10px"><span style="color: #0000ff"><?php</span>

<span style="font-style: italic; color: #666666">// USAGE EXAMPLES</span>
<span style="font-style: italic; color: #666666">// First, obviously, we must instanciate the class</span>
<span style="font-style: italic; color: #666666">// I like to name my var $Session, but it could be shorter like $S.</span>
<span style="color: #000088">$Session</span> <span style="color: #339933">=</span> <span style="color: #0000ff">new</span> Session<span style="color: #009900">(</span><span style="color: #009900">)</span><span style="color: #339933">;</span>

<span style="font-style: italic; color: #666666">// Performing basic $_SESSION operations:</span>
<span style="font-style: italic; color: #666666">// Setting a $_SESSION var</span>
<span style="color: #000088">$Session</span><span style="color: #339933">-></span><span style="color: #004000">set</span><span style="color: #009900">(</span><span style="color: #0000ff">'varname'</span><span style="color: #339933">,</span><span style="color: #0000ff">'value'</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
<span style="font-style: italic; color: #666666">// It's the same as $_SESSION['varname'] = 'value'</span>

<span style="font-style: italic; color: #666666">// Retrieving a $_SESSION var's value</span>
<span style="color: #000088">$Session</span><span style="color: #339933">-></span><span style="color: #004000">get</span><span style="color: #009900">(</span><span style="color: #0000ff">'varname'</span><span style="color: #009900">)</span><span style="color: #339933">;</span>

<span style="font-style: italic; color: #666666">// Deleting a $_SESSION var</span>
<span style="font-style: italic; color: #666666">// Accept multiple arguments</span>
<span style="color: #000088">$Session</span><span style="color: #339933">-></span><span style="color: #004000">del</span><span style="color: #009900">(</span><span style="color: #0000ff">'varname'</span><span style="color: #339933">,</span><span style="color: #0000ff">'varname2'</span><span style="color: #339933">,</span><span style="color: #0000ff">'varname3'</span><span style="color: #009900">)</span><span style="color: #339933">;</span>

<span style="font-style: italic; color: #666666">// Now, about the function FLASH</span>
<span style="font-style: italic; color: #666666">// It sets a $_SESSION var that will last only the next HTTP request</span>
<span style="font-style: italic; color: #666666">// It's useful to define error messages for forms</span>
<span style="font-style: italic; color: #666666">// Example: we have a page form.php and process.php where this last</span>
<span style="font-style: italic; color: #666666">// will manipulate data sended by form.php</span>

<span style="font-style: italic; color: #666666">// PROCESS.PHP</span>
<span style="color: #0099cc">if</span><span style="color: #009900">(</span><span style="color: #000088">$_POST</span><span style="color: #009900">[</span><span style="color: #0000ff">'name'</span><span style="color: #009900">]</span><span style="color: #339933">==</span><span style="color: #0000ff">""</span><span style="color: #009900">)</span> <span style="color: #009900">{</span>
 <span style="color: #000088">$Session</span><span style="color: #339933">-></span><span style="color: #004000">flash</span><span style="color: #009900">(</span><span style="color: #0000ff">'error'</span><span style="color: #339933">,</span><span style="color: #0000ff">'Sorry, you must enter a name'</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
 <span style="color: blue">header</span><span style="color: #009900">(</span><span style="color: #0000ff">'location: form.php'</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
<span style="color: #009900">}</span>

<span style="font-style: italic; color: #666666">// FORM.PHP</span>
<span style="color: #0099cc">if</span><span style="color: #009900">(</span><span style="color: #000088">$Session</span><span style="color: #339933">-></span><span style="color: #004000">get_flash</span><span style="color: #009900">(</span><span style="color: #0000ff">'error'</span><span style="color: #009900">)</span><span style="color: #009900">)</span> <span style="color: #009900">{</span>
 <span style="color: #0099cc">echo</span> <span style="color: #000088">$Session</span><span style="color: #339933">-></span><span style="color: #004000">get_flash</span><span style="color: #009900">(</span><span style="color: #0000ff">'error'</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
 <span style="font-style: italic; color: #666666">// This would display "Sorry, you must enter a name"</span>
<span style="color: #009900">}</span>

<span style="font-style: italic; color: #666666">// About the COOKIES funcions:</span>
<span style="font-style: italic; color: #666666">// They works like the session functions, changing only its names: set_cookie() and del_cookie()(this one accept multiple args as well)</span>
<span style="color: #000000; font-weight: bold">?></span></pre>
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