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changes for getimagesize and new function
#Q: how do i add the new function-file? git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@86734 c90b9560-bf6c-de11-be94-00142212c4b1
This commit is contained in:
Marcus Boerger
parent
58d1ff5ba6
commit
bf592ba144
2 changed files with 117 additions and 15 deletions
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@ -1,5 +1,5 @@
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<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.3 $ -->
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<!-- $Revision: 1.4 $ -->
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<!-- splitted from ./en/functions/image.xml, last change in rev 1.36 -->
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<refentry id="function.getimagesize">
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<refnamediv>
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@ -16,22 +16,24 @@
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<para>
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The <function>getimagesize</function> function will determine the
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size of any <acronym>GIF</acronym>, <acronym>JPG</acronym>,
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<acronym>PNG</acronym>, <acronym>SWF</acronym>,
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<acronym>PSD</acronym>, <acronym>TIFF</acronym>,
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or <acronym>BMP</acronym> image file and
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return the dimensions along with the file type and a height/width
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text string to be used inside a normal <acronym>HTML</acronym>
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<literal>IMG</literal> tag.
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<acronym>PNG</acronym>, <acronym>SWF</acronym>,
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<acronym>SWC</acronym>, <acronym>PSD</acronym>,
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<acronym>TIFF</acronym>, <acronym>BMP</acronym> or
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<acronym>IFF</acronym>
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image file and return the dimensions along with the file type and
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a height/width text string to be used inside a normal
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<acronym>HTML</acronym> <literal>IMG</literal> tag.
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</para>
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<para>
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Returns an array with 4 elements. Index 0 contains the width of
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the image in pixels. Index 1 contains the height. Index 2 a
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flag indicating the type of the image. 1 = GIF, 2 = JPG, 3 =
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PNG, 4 = SWF, 5 = PSD, 6 = BMP, 7 = TIFF(intel byte order),
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8 = TIFF(motorola byte order, 9 = JPC, 10 = JP2, 11 = JPX.
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Index 3 is a text string with the correct
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height="yyy" width="xxx" string that can be used directly in an IMG
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tag.
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8 = TIFF(motorola byte order, 9 = JPC, 10 = JP2, 11 = JPX, 12 =
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JB2, 13 = SWC, 14 = IFF. These values correspond to the IMAGETYPE
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constants taht were added in PHP 4.3. Index 3 is a text string with
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the correct height="yyy" width="xxx" string that can be used
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directly in an IMG tag.
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<example>
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<title>getimagesize (file)</title>
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<programlisting role="php">
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@ -55,11 +57,46 @@ echo "<img src=\"img/flag.jpg\" {$size[3]}>";
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</example>
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</para>
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<para>
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With <acronym>JPG</acronym> images, two extras index are returned:
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<literal>channel</literal> and <literal>bits</literal>.
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<literal>channel</literal> will be 3 for RGB pictures, and 4 for CMYK
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With <acronym>JPG</acronym> images, two extras index are returned :
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<literal>channels</literal> and <literal>bits</literal>.
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<literal>channels</literal> will be 3 for RGB pictures, and 4 for CMYK
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pictures. <literal>bits</literal> is the number of bits for each color.
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</para>
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<para>
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Since PHP 4.3 <literal>bits</literal> and <literal>channels</literal>
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are present for other image types, too. But these values or there
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presence can be a bit confusing. As example <acronym>GIF<acronym>
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allways uses 3 channels per pixel but the number of bits per pixel
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cannot be computed for an animated <acronym>GIF<acronym> with a global
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colortable.
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</para>
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<para>
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Some formats may contain no image or multiple images. In such cases
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GetImageSize might not be able to determine the size and returns zero
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for width and height.
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</para>
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<para>
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Since PHP 4.3 GetImageSize() does also return the additional
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<literal>mime</literal> that receives the mime-type ot the image.
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This information can be used to deliver images with correct http
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Content-type header if this is unknown:
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<example>
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<title>getimagesize and mime-type</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$size = getimagesize ($filename);
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$fp=fopen($filename, "rb");
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if ($size && $fp) {
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header("Content-type: {$size['mime']}");
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fpassthru($fp);
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exit;
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} else // error
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?>
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]]>
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</programlisting>
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</example>
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</para>
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<para>
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If accessing the <parameter>filename</parameter> image is impossible,
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or if it isn't a valid picture, <function>getimagesize</function>
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@ -99,7 +136,8 @@ if (isset ($info["APP13"])) {
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This function does not require the GD image library.
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</simpara>
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<simpara>
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See also <function>exif_imagetype</function>, <function>exif_read_data</function>
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See also <function>image_type_to_mime_type</function>,
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<function>exif_imagetype</function>, <function>exif_read_data</function>
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and <function>exif_thumbnail</function>.
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</simpara>
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<simpara>
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64
reference/image/functions/image_type_to_mime_type.xml
Normal file
64
reference/image/functions/image_type_to_mime_type.xml
Normal file
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@ -0,0 +1,64 @@
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<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.1 $ -->
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<!-- splitted from ./en/functions/image.xml, last change in rev 1.36 -->
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<refentry id="function.image_type_to_mime_type">
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<refnamediv>
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<refname>image_type_to_mime_type</refname>
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<refpurpose>Get Mime-Type for image-type returned by getimagesize,
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exif_read_data, exif_thumbnail, exif_imagetype</refpurpose>
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</refnamediv>
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<refsect1>
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<title>Description</title>
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<methodsynopsis>
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<type>string </type><methodname>image_type_to_mime_type</methodname>
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<methodparam><type>int</type><parameter>imagetype</parameter></methodparam>
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</methodsynopsis>
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<para>
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The <function>image_type_to_mime_type</function> function will determine
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the Mime-Type for an IMAGETYPE constant.
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<example>
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<title>image_type_to_mime_type (file)</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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header ("Content-type: ".image_type_to_mime_type (IMAGETYPE_PNG));
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?>
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]]>
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</programlisting>
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</example>
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</para>
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<para>
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<note>
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<simpara>
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This function does not require the GD image library.
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</simpara>
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<simpara>
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See also <function>getimagesize</function>,
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<function>exif_imagetype</function>, <function>exif_read_data</function>
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and <function>exif_thumbnail</function>.
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</simpara>
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</note>
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</para>
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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:"../../../../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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