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099a58be24
We clarify the details regarding the image size reported by getimagesize() for GIFs vs. the actual size of images created by imagecreatefromgif(). git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@343841 c90b9560-bf6c-de11-be94-00142212c4b1
124 lines
3.1 KiB
XML
124 lines
3.1 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<refentry xml:id="function.imagecreatefromgif" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>imagecreatefromgif</refname>
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<refpurpose>&gd.image.new;</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<type>resource</type><methodname>imagecreatefromgif</methodname>
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<methodparam><type>string</type><parameter>filename</parameter></methodparam>
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</methodsynopsis>
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<para>
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<function>imagecreatefromgif</function> returns an image identifier
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representing the image obtained from the given filename.
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</para>
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<caution>
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<para>
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When reading GIF files into memory, only the first frame
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is returned in the image resource pointer. The size of the image is not
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necessarily what is reported by <function>getimagesize</function>.
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</para>
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</caution>
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&tip.fopen-wrapper;
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<para>
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<variablelist>
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<varlistentry>
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<term><parameter>filename</parameter></term>
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<listitem>
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<para>
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Path to the GIF image.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<para>&gd.return.identifier;</para>
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</refsect1>
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<refsect1 role="examples">
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&reftitle.examples;
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<example>
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<title>Example to handle an error during loading of a GIF</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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function LoadGif($imgname)
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{
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/* Attempt to open */
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$im = @imagecreatefromgif($imgname);
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/* See if it failed */
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if(!$im)
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{
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/* Create a blank image */
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$im = imagecreatetruecolor (150, 30);
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$bgc = imagecolorallocate ($im, 255, 255, 255);
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$tc = imagecolorallocate ($im, 0, 0, 0);
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imagefilledrectangle ($im, 0, 0, 150, 30, $bgc);
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/* Output an error message */
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imagestring ($im, 1, 5, 5, 'Error loading ' . $imgname, $tc);
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}
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return $im;
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}
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header('Content-Type: image/gif');
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$img = LoadGif('bogus.image');
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imagegif($img);
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imagedestroy($img);
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?>
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]]>
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</programlisting>
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&example.outputs.similar;
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<mediaobject>
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<alt>Output of example : Example to handle an error during loading of a GIF</alt>
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<imageobject>
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<imagedata fileref="en/reference/image/figures/imagecreatefromgif.gif"/>
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</imageobject>
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</mediaobject>
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</example>
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</refsect1>
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<refsect1 role="notes">
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&reftitle.notes;
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<note>
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<para>
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GIF support was removed from the GD library in Version 1.6,
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and added back in Version 2.0.28. This function is not
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available between these versions.
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</para>
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</note>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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