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102 lines
4.6 KiB
HTML
102 lines
4.6 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>从字符串中获取图像尺寸信息</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.getimagesizefromstring" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">getimagesizefromstring</h1>
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<p class="verinfo">(PHP 5 >= 5.4.0, PHP 7)</p><p class="refpurpose"><span class="refname">getimagesizefromstring</span> — <span class="dc-title">从字符串中获取图像尺寸信息</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.getimagesizefromstring-description">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>getimagesizefromstring</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$imagedata</code></span>
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[, <span class="methodparam"><span class="type">array</span> <code class="parameter reference">&$imageinfo</code></span>
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] ) : <span class="type">array</span></div>
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<p class="para rdfs-comment">
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同 <span class="function"><a href="getimagesize.html" class="function">getimagesize()</a></span> 函数。
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区别是 <span class="function"><strong>getimagesizefromstring()</strong></span> 第一个参数是图像数据的字符串表达，而不是文件名。
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</p>
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<p class="para">
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关于本函数如何工作的更多信息请参见
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<span class="function"><a href="getimagesize.html" class="function">getimagesize()</a></span> 函数。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.getimagesizefromstring-parameters">
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<h3 class="title">参数</h3>
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<dl>
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<dt>
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<code class="parameter">imagedata</code></dt>
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<dd>
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<p class="para">
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图像数据的字符串表示。
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</p>
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</dd>
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<dt>
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<code class="parameter">imageinfo</code></dt>
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<dd>
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<p class="para">
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参见 <span class="function"><a href="getimagesize.html" class="function">getimagesize()</a></span> 函数。
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</p>
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</dd>
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</dl>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.getimagesizefromstring-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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参见 <span class="function"><a href="getimagesize.html" class="function">getimagesize()</a></span> 函数。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.getimagesizefromstring-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="example-3649">
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<p><strong>Example #1 <span class="function"><strong>getimagesizefromstring()</strong></span> 函数例程</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br />$img </span><span style="color: #007700">= </span><span style="color: #DD0000">'/path/to/test.png'</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">// 以文件方式打开<br /></span><span style="color: #0000BB">$size_info1 </span><span style="color: #007700">= </span><span style="color: #0000BB">getimagesize</span><span style="color: #007700">(</span><span style="color: #0000BB">$img</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// 以字符串格式打开<br /></span><span style="color: #0000BB">$data </span><span style="color: #007700">= </span><span style="color: #0000BB">file_get_contents</span><span style="color: #007700">(</span><span style="color: #0000BB">$img</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$size_info2 </span><span style="color: #007700">= </span><span style="color: #0000BB">getimagesizefromstring</span><span style="color: #007700">(</span><span style="color: #0000BB">$data</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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</div>
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.getimagesizefromstring-seealso">
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<h3 class="title">参见</h3>
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<p class="para">
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="getimagesize.html" class="function" rel="rdfs-seeAlso">getimagesize()</a> - 取得图像大小</span></li>
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</ul>
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</p>
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</div>
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</div></div></div></body></html> |