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94 lines
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HTML
94 lines
6.1 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>从字符串中的图像流新建一图像</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.imagecreatefromstring" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">imagecreatefromstring</h1>
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<p class="verinfo">(PHP 4 >= 4.0.4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">imagecreatefromstring</span> — <span class="dc-title">从字符串中的图像流新建一图像</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.imagecreatefromstring-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>imagecreatefromstring</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$image</code></span>
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) : <span class="type">resource</span></div>
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<p class="para rdfs-comment">
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<span class="function"><strong>imagecreatefromstring()</strong></span>
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返回一个图像标识符，其表达了从给定字符串得来的图像。图像格式将自动检测，只要
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PHP 支持：JPEG，PNG，GIF，WBMP 和 GD2。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.imagecreatefromstring-parameters">
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<h3 class="title">参数</h3>
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<p class="para">
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<dl>
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<dt>
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<code class="parameter">image</code></dt>
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<dd>
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<p class="para">
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A string containing the image data.
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</p>
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</dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.imagecreatefromstring-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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An image resource will be returned on success. <strong><code>FALSE</code></strong> is returned if
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the image type is unsupported, the data is not in a recognised format,
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or the image is corrupt and cannot be loaded.
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.imagecreatefromstring-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-3684">
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<p><strong>Example #1 <span class="function"><strong>imagecreatefromstring()</strong></span> example</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 />$data </span><span style="color: #007700">= </span><span style="color: #DD0000">'iVBORw0KGgoAAAANSUhEUgAAABwAAAASCAMAAAB/2U7WAAAABl'<br /> </span><span style="color: #007700">. </span><span style="color: #DD0000">'BMVEUAAAD///+l2Z/dAAAASUlEQVR4XqWQUQoAIAxC2/0vXZDr'<br /> </span><span style="color: #007700">. </span><span style="color: #DD0000">'EX4IJTRkb7lobNUStXsB0jIXIAMSsQnWlsV+wULF4Avk9fLq2r'<br /> </span><span style="color: #007700">. </span><span style="color: #DD0000">'8a5HSE35Q3eO2XP1A1wQkZSgETvDtKdQAAAABJRU5ErkJggg=='</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$data </span><span style="color: #007700">= </span><span style="color: #0000BB">base64_decode</span><span style="color: #007700">(</span><span style="color: #0000BB">$data</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$im </span><span style="color: #007700">= </span><span style="color: #0000BB">imagecreatefromstring</span><span style="color: #007700">(</span><span style="color: #0000BB">$data</span><span style="color: #007700">);<br />if (</span><span style="color: #0000BB">$im </span><span style="color: #007700">!== </span><span style="color: #0000BB">false</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">header</span><span style="color: #007700">(</span><span style="color: #DD0000">'Content-Type: image/png'</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">imagepng</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">imagedestroy</span><span style="color: #007700">(</span><span style="color: #0000BB">$im</span><span style="color: #007700">);<br />}<br />else {<br /> echo </span><span style="color: #DD0000">'An error occurred.'</span><span style="color: #007700">;<br />}<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 class="example-contents"><p>以上例程的输出类似于：</p></div>
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<div class="mediaobject">
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<div class="imageobject">
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<img src="images/21009b70229598c6a80eef8b45bf282b-imagecreatefromstring.png" alt="Output of example : imagecreatefromstring()" width="28" height="18" />
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</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.imagecreatefromstring-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="imagecreatefromjpeg.html" class="function" rel="rdfs-seeAlso">imagecreatefromjpeg()</a> - 由文件或 URL 创建一个新图象。</span></li>
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<li class="member"><span class="function"><a href="imagecreatefrompng.html" class="function" rel="rdfs-seeAlso">imagecreatefrompng()</a> - 由文件或 URL 创建一个新图象。</span></li>
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<li class="member"><span class="function"><a href="imagecreatefromgif.html" class="function" rel="rdfs-seeAlso">imagecreatefromgif()</a> - 由文件或 URL 创建一个新图象。</span></li>
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<li class="member"><span class="function"><a href="imagecreatetruecolor.html" class="function" rel="rdfs-seeAlso">imagecreatetruecolor()</a> - 新建一个真彩色图像</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> |