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<h1>PHP HTTP Functions</h1>
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<h2>PHP HTTP Introduction</h2>
<p>The HTTP functions let you manipulate information sent to the browser by the 
Web server, before any other output has been sent.</p>
<hr />

<h2>Installation</h2>
<p>The directory functions are part of the PHP core. There is no installation 
needed to use these functions.</p>
<hr />

<h2>PHP HTTP Functions</h2>
<p><b>PHP</b>: indicates the earliest version of PHP that supports the 
  function. </p>
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    <th width="38%" align="left" valign="top">Function</th>
    <th width="57%" align="left" valign="top">Description</th>
    <th width="5%" align="left" valign="top">PHP</th>
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    <td valign="top"><a href="func_http_header.asp">header()</a></td>
    <td valign="top">Sends a raw HTTP header to a client</td>
    <td valign="top">3</td>
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    <td valign="top"><a href="func_http_headers_list.asp">headers_list()</a></td>
    <td valign="top">Returns a list of response headers sent (or ready to send)</td>
    <td valign="top">5</td>
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    <td valign="top"><a href="func_http_headers_sent.asp">headers_sent()</a></td>
    <td valign="top">Checks if / where the HTTP headers have been sent</td>
    <td valign="top">3</td>
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    <td valign="top"><a href="func_http_setcookie.asp">setcookie()</a></td>
    <td valign="top">Sends an HTTP cookie to a client</td>
    <td valign="top">3</td>
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    <td valign="top"><a href="func_http_setrawcookie.asp">setrawcookie()</a></td>
    <td valign="top">Sends an HTTP cookie without URL encoding the cookie value</td>
    <td valign="top">5</td>
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<h2>PHP HTTP Constants</h2>
<p><b>None.</b><br />

</p>

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