wrappers.http.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>HTTP and HTTPS</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="wrappers.html">List of Supported Protocols/Wrappers</a></div> <div class="next" style="text-align: right; float: right;"><a href="wrappers.ftp.html">FTP and FTPS</a></div> <div class="up"><a href="wrappers.html">List of Supported Protocols/Wrappers</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="wrappers.http" class="section"> <h2 class="title">HTTP and HTTPS</h2> <p class="simpara">PHP 4, PHP 5, PHP 6. <var class="filename">https://</var> since PHP 4.3.0</p> <ul class="itemizedlist"> <li class="listitem"><span class="simpara"><var class="filename">http://example.com</var></span></li> <li class="listitem"><span class="simpara"><var class="filename">http://example.com/file.php?var1=val1&var2=val2</var></span></li> <li class="listitem"><span class="simpara"><var class="filename">http://user:password@example.com</var></span></li> <li class="listitem"><span class="simpara"><var class="filename">https://example.com</var></span></li> <li class="listitem"><span class="simpara"><var class="filename">https://example.com/file.php?var1=val1&var2=val2</var></span></li> <li class="listitem"><span class="simpara"><var class="filename">https://user:password@example.com</var></span></li> </ul> <p class="simpara">Allows read-only access to files/resources via HTTP 1.0, using the HTTP GET method. A <i>Host:</i> header is sent with the request to handle name-based virtual hosts. If you have configured a <a href="filesystem.configuration.html#ini.user-agent" class="link">user_agent</a> string using your ini file or the stream context, it will also be included in the request. </p> <div class="warning"><b class="warning">Warning</b><p class="para">When using SSL, Microsoft IISwill violate the protocol by closing the connection without sending a<i>close_notify</i> indicator. PHP will report this as "SSL: FatalProtocol Error" when you reach the end of the data. To work around this, thevalue of <a href="errorfunc.configuration.html#ini.error-reporting" class="link">error_reporting</a> should belowered to a level that does not include warnings.PHP 4.3.7 and higher can detect buggy IIS server software when you openthe stream using the <i>https://</i> wrapper and will suppress thewarning. When using <a href="function.fsockopen.html" class="function">fsockopen()</a> to create an<i>ssl://</i> socket, the developer is responsible for detectingand suppressing this warning.</p></div> <p class="simpara"> Redirects have been supported since PHP 4.0.5; if you are using an earlier version you will need to include trailing slashes in your URLs. If it's important to know the URL of the resource where your document came from (after all redirects have been processed), you'll need to process the series of response headers returned by the stream. </p> <div class="informalexample"> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />$url </span><span style="color: #007700">= </span><span style="color: #DD0000">'http://www.example.com/redirecting_page.php'</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$fp </span><span style="color: #007700">= </span><span style="color: #0000BB">fopen</span><span style="color: #007700">(</span><span style="color: #0000BB">$url</span><span style="color: #007700">, </span><span style="color: #DD0000">'r'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* Prior to PHP 4.3.0 use $http_response_header<br /> instead of stream_get_meta_data() */<br /></span><span style="color: #0000BB">$meta_data </span><span style="color: #007700">= </span><span style="color: #0000BB">stream_get_meta_data</span><span style="color: #007700">(</span><span style="color: #0000BB">$fp</span><span style="color: #007700">);<br />foreach(</span><span style="color: #0000BB">$meta_data</span><span style="color: #007700">[</span><span style="color: #DD0000">'wrapper_data'</span><span style="color: #007700">] as </span><span style="color: #0000BB">$response</span><span style="color: #007700">) {<br /><br /> </span><span style="color: #FF8000">/* Were we redirected? */<br /> </span><span style="color: #007700">if (</span><span style="color: #0000BB">substr</span><span style="color: #007700">(</span><span style="color: #0000BB">strtolower</span><span style="color: #007700">(</span><span style="color: #0000BB">$response</span><span style="color: #007700">), </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">10</span><span style="color: #007700">) == </span><span style="color: #DD0000">'location: '</span><span style="color: #007700">) {<br /> </span><span style="color: #FF8000">/* update $url with where we were redirected to */<br /> </span><span style="color: #0000BB">$url </span><span style="color: #007700">= </span><span style="color: #0000BB">substr</span><span style="color: #007700">(</span><span style="color: #0000BB">$response</span><span style="color: #007700">, </span><span style="color: #0000BB">18</span><span style="color: #007700">);<br /> }<br /><br />}<br /><br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> <p class="simpara"> The stream allows access to the <em class="emphasis">body</em> of the resource; the headers are stored in the <var class="varname"><a href="reserved.variables.httpresponseheader.html" class="classname">$http_response_header</a></var> variable. Since PHP 4.3.0, the headers are available using <a href="function.stream-get-meta-data.html" class="function">stream_get_meta_data()</a>. </p> <p class="simpara"> HTTP connections are read-only; you cannot write data or copy files to an HTTP resource. </p> <blockquote><p><b class="note">Note</b>: <span class="simpara">HTTPS is supported starting from PHP 4.3.0, if you have compiled in support for OpenSSL. </span> </p></blockquote> <p class="para"> <table border="5"> <caption><b>Wrapper Summary</b></caption> <colgroup> <thead valign="middle"> <tr valign="middle"> <th colspan="1">Attribute</th> <th colspan="1">Supported</th> </tr> </thead> <tbody valign="middle" class="tbody"> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">Restricted by <a href="filesystem.configuration.html#ini.allow-url-fopen" class="link">allow_url_fopen</a></td> <td colspan="1" rowspan="1" align="left">Yes</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">Allows Reading</td> <td colspan="1" rowspan="1" align="left">Yes</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">Allows Writing</td> <td colspan="1" rowspan="1" align="left">No</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">Allows Appending</td> <td colspan="1" rowspan="1" align="left">No</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">Allows Simultaneous Reading and Writing</td> <td colspan="1" rowspan="1" align="left">N/A</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">Supports <a href="function.stat.html" class="function">stat()</a></td> <td colspan="1" rowspan="1" align="left">No</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">Supports <a href="function.unlink.html" class="function">unlink()</a></td> <td colspan="1" rowspan="1" align="left">No</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">Supports <a href="function.rename.html" class="function">rename()</a></td> <td colspan="1" rowspan="1" align="left">No</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">Supports <a href="function.mkdir.html" class="function">mkdir()</a></td> <td colspan="1" rowspan="1" align="left">No</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">Supports <a href="function.rmdir.html" class="function">rmdir()</a></td> <td colspan="1" rowspan="1" align="left">No</td> </tr> </tbody> </colgroup> </table> </p> <p class="para"> Custom headers may be sent with an HTTP request prior to version 5 by taking advantage of a side-effect in the handling of the <i>user_agent</i> INI setting. Set <i>user_agent</i> to any valid string (such as the default <i>PHP/version</i> setting) followed by a carriage-return/line-feed pair and any additional headers. This method works in PHP 4 and all later versions. </p> <p class="para"> <div class="example"> <p><b>Example #1 Sending custom headers with an HTTP request</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />ini_set</span><span style="color: #007700">(</span><span style="color: #DD0000">'user_agent'</span><span style="color: #007700">, </span><span style="color: #DD0000">"PHP\r\nX-MyCustomHeader: Foo"</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$fp </span><span style="color: #007700">= </span><span style="color: #0000BB">fopen</span><span style="color: #007700">(</span><span style="color: #DD0000">'http://www.example.com/index.php'</span><span style="color: #007700">, </span><span style="color: #DD0000">'r'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> <div class="example-contents"><p>Results in the following request being sent:</p></div> <div class="example-contents"><pre><div class="cdata"><pre>GET /index.php HTTP/1.0Host: www.example.comUser-Agent: PHPX-MyCustomHeader: Foo</pre></div> </pre></div> </div> </p> </div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="wrappers.html">List of Supported Protocols/Wrappers</a></div> <div class="next" style="text-align: right; float: right;"><a href="wrappers.ftp.html">FTP and FTPS</a></div> <div class="up"><a href="wrappers.html">List of Supported Protocols/Wrappers</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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