📄 function.base64-encode.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>Encodes data with MIME base64</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="function.base64-decode.html">base64_decode</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.get-headers.html">get_headers</a></div> <div class="up"><a href="ref.url.html">URL Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.base64-encode" class="refentry"> <div class="refnamediv"> <h1 class="refname">base64_encode</h1> <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">base64_encode</span> — <span class="dc-title">Encodes data with MIME base64</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">string</span> <span class="methodname"><b><b>base64_encode</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$data</tt></span> )</div> <p class="para rdfs-comment"> Encodes the given <i><tt class="parameter">data</tt></i> with base64. </p> <p class="para"> This encoding is designed to make binary data survive transport through transport layers that are not 8-bit clean, such as mail bodies. </p> <p class="para"> Base64-encoded data takes about 33% more space than the original data. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">data</tt></i></span> <dd> <p class="para"> The data to encode. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> The encoded data, as a string. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>base64_encode()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />$str </span><span style="color: #007700">= </span><span style="color: #DD0000">'This is an encoded string'</span><span style="color: #007700">;<br />echo </span><span style="color: #0000BB">base64_encode</span><span style="color: #007700">(</span><span style="color: #0000BB">$str</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> <div class="example-contents"><p>The above example will output:</p></div> <div class="example-contents"><pre><div class="cdata"><pre>VGhpcyBpcyBhbiBlbmNvZGVkIHN0cmluZw==</pre></div> </pre></div> </div> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.base64-decode.html" class="function" rel="rdfs-seeAlso">base64_decode()</a></li> <li class="member"><a href="function.chunk-split.html" class="function" rel="rdfs-seeAlso">chunk_split()</a></li> <li class="member"><a href="function.convert-uuencode.html" class="function" rel="rdfs-seeAlso">convert_uuencode()</a></li> <li class="member"><a href="http://www.faqs.org/rfcs/rfc2045" class="link external">» RFC 2045</a> section 6.8</li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.base64-decode.html">base64_decode</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.get-headers.html">get_headers</a></div> <div class="up"><a href="ref.url.html">URL Functions</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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