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【PHP】 Cookie中存入一个数组
作者: / 发布于2011/1/4/ 870
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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: #009933">/**</span>
<span style="font-style: italic; color: #009933">* Store an array inside a cookie as a JSON String</span>
<span style="font-style: italic; color: #009933">* Useful for passing large bits of data :)</span>
<span style="font-style: italic; color: #009933">* @author LiamC</span>
<span style="font-style: italic; color: #009933">* @param $var = cookie value</span>
<span style="font-style: italic; color: #009933">* @param $limit = size limit. default and max size for a cookie is 4kb.</span>
<span style="font-style: italic; color: #009933">**/</span>
<span style="color: #0000ff">function</span> cookieArray<span style="color: #009900">(</span><span style="color: #000088">$var</span><span style="color: #339933">,</span> <span style="color: #000088">$limit</span><span style="color: #339933">=</span><span style="color: #cc66cc">4096</span><span style="color: #339933">,</span> <span style="color: #000088">$cookie_name</span><span style="color: #339933">=</span><span style="color: #0000ff">"my_cookie"</span><span style="color: #009900">)</span>
<span style="color: #009900">{</span>
    <span style="font-style: italic; color: #666666">//check if we have cookie</span>
    <span style="color: #0099cc">if</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="font-style: italic; color: #666666">//decode cookie string from JSON</span>
        <span style="color: #000088">$cookieArr</span> <span style="color: #339933">=</span> <span style="color: #009900">(</span><span style="color: blue">array</span><span style="color: #009900">)</span> <span style="color: blue">json_decode</span><span style="color: #009900">(</span><span style="color: #000088">$_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: #339933">;</span>                            
        
        <span style="font-style: italic; color: #666666">//push additional data</span>
        <span style="color: blue">array_push</span><span style="color: #009900">(</span><span style="color: #000088">$cookieArr</span><span style="color: #339933">,</span> <span style="color: #000088">$var</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
        
        <span style="font-style: italic; color: #666666">//remove empty values</span>
        <span style="color: #0099cc">foreach</span><span style="color: #009900">(</span><span style="color: #000088">$cookieArr</span> <span style="color: #0099cc">as</span> <span style="color: #000088">$k</span> <span style="color: #339933">=></span> <span style="color: #000088">$v</span><span style="color: #009900">)</span><span style="color: #009900">{</span> <span style="color: #0099cc">if</span><span style="color: #009900">(</span><span style="color: #000088">$v</span> <span style="color: #339933">==</span> <span style="color: #0000ff">''</span> <span style="color: #339933">||</span> <span style="color: blue">is_null</span><span style="color: #009900">(</span><span style="color: #000088">$v</span><span style="color: #009900">)</span> <span style="color: #339933">||</span> <span style="color: #000088">$v</span> <span style="color: #339933">==</span> <span style="color: #cc66cc">0</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">$cookieArr</span><span style="color: #009900">[</span><span style="color: #000088">$k</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="font-style: italic; color: #666666">//encode data again for cookie</span>
        <span style="color: #000088">$cookie_data</span> <span style="color: #339933">=</span> <span style="color: blue">json_encode</span><span style="color: #009900">(</span><span style="color: #000088">$cookieArr</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
        
        <span style="font-style: italic; color: #666666">//need to limit cookie size. Default is set to 4Kb. If it is greater than limit. it then gets reset.</span>
        <span style="color: #000088">$cookie_data</span> <span style="color: #339933">=</span> <span style="color: blue">mb_strlen</span><span style="color: #009900">(</span><span style="color: #000088">$cookie_data</span><span style="color: #009900">)</span> <span style="color: #339933">>=</span> <span style="color: #000088">$limit</span> ? <span style="color: #0000ff">''</span> <span style="color: #339933">:</span> <span style="color: #000088">$cookie_data</span><span style="color: #339933">;</span>
        
        <span style="font-style: italic; color: #666666">//destroy cookie</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: #0000ff">''</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="font-style: italic; color: #666666">//set cookie with new data and expires after a week</span>
        <span style="color: blue">setcookie</span><span style="color: #009900">(</span><span style="color: #000088">$cookie_name</span><span style="color: #339933">,</span> <span style="color: #000088">$cookie_data</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: #009900">(</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: #cc66cc">7</span><span style="color: #009900">)</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: #0099cc">else</span><span style="color: #009900">{</span>
    
        <span style="font-style: italic; color: #666666">//create cookie with json string etc.</span>
        <span style="color: #000088">$cookie_data</span> <span style="color: #339933">=</span> <span style="color: blue">json_encode</span><span style="color: #009900">(</span><span style="color: #000088">$var</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
        <span style="font-style: italic; color: #666666">//set cookie expires after a week</span>
        <span style="color: blue">setcookie</span><span style="color: #009900">(</span><span style="color: #000088">$cookie_name</span><span style="color: #339933">,</span> <span style="color: #000088">$cookie_data</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: #009900">(</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: #cc66cc">7</span><span style="color: #009900">)</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="font-style: italic; color: #666666">//end if</span>
    
<span style="color: #009900">}</span><span style="font-style: italic; color: #666666">//end cookieArray </span>

<span style="color: #000000; font-weight: bold">?></span></pre>
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