<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >imagecreatefromstring</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REL="HOME" TITLE="PHP 手册" HREF="index.html"><LINK REL="UP" TITLE="Image 图像函数" HREF="ref.image.html"><LINK REL="PREVIOUS" TITLE="imagecreatefrompng" HREF="function.imagecreatefrompng.html"><LINK REL="NEXT" TITLE="imagecreatefromwbmp" HREF="function.imagecreatefromwbmp.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=UTF-8"></HEAD ><BODY CLASS="refentry" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >PHP 手册</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.imagecreatefrompng.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.imagecreatefromwbmp.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.imagecreatefromstring" ></A >imagecreatefromstring</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN88046" ></A ><P > (PHP 4 >= 4.0.4, PHP 5)</P >imagecreatefromstring -- 从字符串中的图像流新建一图像</DIV ><DIV CLASS="refsect1" ><A NAME="AEN88049" ></A ><H2 >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。 </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN88059" ></A ><H2 >返回值</H2 ><P > 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 >。 </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN88063" ></A ><H2 >范例</H2 ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN88066" ></A ><P ><B >例 1. <B CLASS="function" >imagecreatefromstring()</B > 例子</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><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> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN88070" ></A ><H2 >参见</H2 ><P > <P ></P ><TABLE BORDER="0" ><TBODY ><TR ><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 ></TR ></TBODY ></TABLE ><P ></P > </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="function.imagecreatefrompng.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >起始页</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.imagecreatefromwbmp.html" 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