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>imagecreatefromstring</H1
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> (PHP 4 >= 4.0.4, PHP 5)</P
>imagecreatefromstring -- 从字符串中的图像流新建一图像</DIV
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>说明</H2
>resource <B
CLASS="methodname"
>imagecreatefromstring</B
> ( string image )<BR
></BR
><P
> <B
CLASS="function"
>imagecreatefromstring()</B
>
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
PHP 支持：JPEG，PNG，GIF，WBMP 和 GD2。
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>返回值</H2
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> 成功则返回图像资源，如果图像格式不支持，数据不是认可的格式，或者图像已损坏则返回
<TT
CLASS="constant"
><B
>FALSE</B
></TT
>。
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>例 1. <B
CLASS="function"
>imagecreatefromstring()</B
> 例子</B
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><code><font color="#000000">
<font color="#0000BB"><?php<br />$data </font><font color="#007700">= </font><font color="#DD0000">'iVBORw0KGgoAAAANSUhEUgAAABwAAAASCAMAAAB/2U7WAAAABl'<br /> </font><font color="#007700">. </font><font color="#DD0000">'BMVEUAAAD///+l2Z/dAAAASUlEQVR4XqWQUQoAIAxC2/0vXZDr'<br /> </font><font color="#007700">. </font><font color="#DD0000">'EX4IJTRkb7lobNUStXsB0jIXIAMSsQnWlsV+wULF4Avk9fLq2r'<br /> </font><font color="#007700">. </font><font color="#DD0000">'8a5HSE35Q3eO2XP1A1wQkZSgETvDtKdQAAAABJRU5ErkJggg=='</font><font color="#007700">;<br /></font><font color="#0000BB">$data </font><font color="#007700">= </font><font color="#0000BB">base64_decode</font><font color="#007700">(</font><font color="#0000BB">$data</font><font color="#007700">);<br /><br /></font><font color="#0000BB">$im </font><font color="#007700">= </font><font color="#0000BB">imagecreatefromstring</font><font color="#007700">(</font><font color="#0000BB">$data</font><font color="#007700">);<br />if (</font><font color="#0000BB">$im </font><font color="#007700">!== </font><font color="#0000BB">false</font><font color="#007700">) {<br /> </font><font color="#0000BB">header</font><font color="#007700">(</font><font color="#DD0000">'Content-Type: image/png'</font><font color="#007700">);<br /> </font><font color="#0000BB">imagepng</font><font color="#007700">(</font><font color="#0000BB">$im</font><font color="#007700">);<br />}<br />else {<br /> echo </font><font color="#DD0000">'An error occured.'</font><font color="#007700">;<br />}<br /></font><font color="#0000BB">?></font>
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>参见</H2
><P
> <P
></P
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><TD
><A
HREF="function.imagecreatefromjpeg.html"
><B
CLASS="function"
>imagecreatefromjpeg()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.imagecreatefrompng.html"
><B
CLASS="function"
>imagecreatefrompng()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.imagecreatefromgif.html"
><B
CLASS="function"
>imagecreatefromgif()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.imagecreatetruecolor.html"
><B
CLASS="function"
>imagecreatetruecolor()</B
></A
></TD
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