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【PHP】获得远程文件的大小
作者: / 发布于2011/1/4/ 502
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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">function</span> remote_filesize<span style="color: #009900">(</span><span style="color: #000088">$url</span><span style="color: #339933">,</span> <span style="color: #000088">$user</span> <span style="color: #339933">=</span> <span style="color: #0000ff">""</span><span style="color: #339933">,</span> <span style="color: #000088">$pw</span> <span style="color: #339933">=</span> <span style="color: #0000ff">""</span><span style="color: #009900">)</span>
<span style="color: #009900">{</span>
    <span style="color: blue">ob_start</span><span style="color: #009900">(</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
    <span style="color: #000088">$ch</span> <span style="color: #339933">=</span> <span style="color: blue">curl_init</span><span style="color: #009900">(</span><span style="color: #000088">$url</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
    <span style="color: blue">curl_setopt</span><span style="color: #009900">(</span><span style="color: #000088">$ch</span><span style="color: #339933">,</span> CURLOPT_HEADER<span style="color: #339933">,</span> <span style="color: #cc66cc">1</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
    <span style="color: blue">curl_setopt</span><span style="color: #009900">(</span><span style="color: #000088">$ch</span><span style="color: #339933">,</span> CURLOPT_NOBODY<span style="color: #339933">,</span> <span style="color: #cc66cc">1</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: #339933">!</span><span style="color: blue">empty</span><span style="color: #009900">(</span><span style="color: #000088">$user</span><span style="color: #009900">)</span> <span style="color: #339933">&&</span> <span style="color: #339933">!</span><span style="color: blue">empty</span><span style="color: #009900">(</span><span style="color: #000088">$pw</span><span style="color: #009900">)</span><span style="color: #009900">)</span>
    <span style="color: #009900">{</span>
        <span style="color: #000088">$headers</span> <span style="color: #339933">=</span> <span style="color: blue">array</span><span style="color: #009900">(</span><span style="color: #0000ff">'Authorization: Basic '</span> <span style="color: #339933">.</span> <span style="color: blue">base64_encode</span><span style="color: #009900">(</span><span style="color: #0000ff">"<span style="color: #006699; font-weight: bold">$user</span>:<span style="color: #006699; font-weight: bold">$pw</span>"</span><span style="color: #009900">)</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
        <span style="color: blue">curl_setopt</span><span style="color: #009900">(</span><span style="color: #000088">$ch</span><span style="color: #339933">,</span> CURLOPT_HTTPHEADER<span style="color: #339933">,</span> <span style="color: #000088">$headers</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
    <span style="color: #009900">}</span>

    <span style="color: #000088">$ok</span> <span style="color: #339933">=</span> <span style="color: blue">curl_exec</span><span style="color: #009900">(</span><span style="color: #000088">$ch</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
    <span style="color: blue">curl_close</span><span style="color: #009900">(</span><span style="color: #000088">$ch</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
    <span style="color: #000088">$head</span> <span style="color: #339933">=</span> <span style="color: blue">ob_get_contents</span><span style="color: #009900">(</span><span style="color: #009900">)</span><span style="color: #339933">;</span>
    <span style="color: blue">ob_end_clean</span><span style="color: #009900">(</span><span style="color: #009900">)</span><span style="color: #339933">;</span>

    <span style="color: #000088">$regex</span> <span style="color: #339933">=</span> <span style="color: #0000ff">'/Content-Length:\s([0-9].+?)\s/'</span><span style="color: #339933">;</span>
    <span style="color: #000088">$count</span> <span style="color: #339933">=</span> <span style="color: blue">preg_match</span><span style="color: #009900">(</span><span style="color: #000088">$regex</span><span style="color: #339933">,</span> <span style="color: #000088">$head</span><span style="color: #339933">,</span> <span style="color: #000088">$matches</span><span style="color: #009900">)</span><span style="color: #339933">;</span>

    <span style="color: #0099cc">return</span> <span style="color: blue">isset</span><span style="color: #009900">(</span><span style="color: #000088">$matches</span><span style="color: #009900">[</span><span style="color: #cc66cc">1</span><span style="color: #009900">]</span><span style="color: #009900">)</span> ? <span style="color: #000088">$matches</span><span style="color: #009900">[</span><span style="color: #cc66cc">1</span><span style="color: #009900">]</span> <span style="color: #339933">:</span> <span style="color: #0000ff">"unknown"</span><span style="color: #339933">;</span>
<span style="color: #009900">}</span></pre>
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