📄 function.imagecreatefromstring.html
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Create a new image from the image stream in the string</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.imagecreatefrompng.html">imagecreatefrompng</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.imagecreatefromwbmp.html">imagecreatefromwbmp</a></div> <div class="up"><a href="ref.image.html">GD Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.imagecreatefromstring" class="refentry"> <div class="refnamediv"> <h1 class="refname">imagecreatefromstring</h1> <p class="verinfo">(PHP 4 >= 4.0.4, PHP 5)</p><p class="refpurpose"><span class="refname">imagecreatefromstring</span> — <span class="dc-title">Create a new image from the image stream in the string</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">resource</span> <span class="methodname"><b><b>imagecreatefromstring</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$data</tt></span> )</div> <p class="para rdfs-comment"> <b>imagecreatefromstring()</b> returns an image identifier representing the image obtained from the given <i><tt class="parameter">data</tt></i> These types will be automatically detected if your build of PHP supports them: JPEG, PNG, GIF, WBMP, and GD2. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">image</tt></i></span> <dd> <p class="para"> A string containing the image data. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> An image resource will be returned on success. <b><tt>FALSE</tt></b> is returned if the image type is unsupported, the data is not in a recognised format, or the image is corrupt and cannot be loaded. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>imagecreatefromstring()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />$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></span></code></div> </div> <div class="example-contents"><p>The above example will output something similar to:</p></div> <div class="mediaobject"> <div class="imageobject"> <img src="figures/image.imagecreatefromstring.png" /> </div> </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.imagecreatefromjpeg.html" class="function" rel="rdfs-seeAlso">imagecreatefromjpeg()</a></li> <li class="member"><a href="function.imagecreatefrompng.html" class="function" rel="rdfs-seeAlso">imagecreatefrompng()</a></li> <li class="member"><a href="function.imagecreatefromgif.html" class="function" rel="rdfs-seeAlso">imagecreatefromgif()</a></li> <li class="member"><a href="function.imagecreatetruecolor.html" class="function" rel="rdfs-seeAlso">imagecreatetruecolor()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.imagecreatefrompng.html">imagecreatefrompng</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.imagecreatefromwbmp.html">imagecreatefromwbmp</a></div> <div class="up"><a href="ref.image.html">GD Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -