helly Tue Jun 25 17:29:21 2002 EDT
Added files:
/phpdoc/en/reference/image/functions image_type_to_mime_type.xml
Modified files:
/phpdoc/en/reference/image/functions getimagesize.xml
Log:
changes for getimagesize and new function
#Q: how do i add the new function-file?
Index: phpdoc/en/reference/image/functions/getimagesize.xml
diff -u phpdoc/en/reference/image/functions/getimagesize.xml:1.3
phpdoc/en/reference/image/functions/getimagesize.xml:1.4
--- phpdoc/en/reference/image/functions/getimagesize.xml:1.3 Tue Jun 25 16:58:31
2002
+++ phpdoc/en/reference/image/functions/getimagesize.xml Tue Jun 25 17:29:20
+2002
@@ -1,5 +1,5 @@
<?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.3 $ -->
+<!-- $Revision: 1.4 $ -->
<!-- splitted from ./en/functions/image.xml, last change in rev 1.36 -->
<refentry id="function.getimagesize">
<refnamediv>
@@ -16,22 +16,24 @@
<para>
The <function>getimagesize</function> function will determine the
size of any <acronym>GIF</acronym>, <acronym>JPG</acronym>,
- <acronym>PNG</acronym>, <acronym>SWF</acronym>,
- <acronym>PSD</acronym>, <acronym>TIFF</acronym>,
- or <acronym>BMP</acronym> image file and
- return the dimensions along with the file type and a height/width
- text string to be used inside a normal <acronym>HTML</acronym>
- <literal>IMG</literal> tag.
+ <acronym>PNG</acronym>, <acronym>SWF</acronym>,
+ <acronym>SWC</acronym>, <acronym>PSD</acronym>,
+ <acronym>TIFF</acronym>, <acronym>BMP</acronym> or
+ <acronym>IFF</acronym>
+ image file and return the dimensions along with the file type and
+ a height/width text string to be used inside a normal
+ <acronym>HTML</acronym> <literal>IMG</literal> tag.
</para>
<para>
Returns an array with 4 elements. Index 0 contains the width of
the image in pixels. Index 1 contains the height. Index 2 a
flag indicating the type of the image. 1 = GIF, 2 = JPG, 3 =
PNG, 4 = SWF, 5 = PSD, 6 = BMP, 7 = TIFF(intel byte order),
- 8 = TIFF(motorola byte order, 9 = JPC, 10 = JP2, 11 = JPX.
- Index 3 is a text string with the correct
- height="yyy" width="xxx" string that can be used directly in an IMG
- tag.
+ 8 = TIFF(motorola byte order, 9 = JPC, 10 = JP2, 11 = JPX, 12 =
+ JB2, 13 = SWC, 14 = IFF. These values correspond to the IMAGETYPE
+ constants taht were added in PHP 4.3. Index 3 is a text string with
+ the correct height="yyy" width="xxx" string that can be used
+ directly in an IMG tag.
<example>
<title>getimagesize (file)</title>
<programlisting role="php">
@@ -55,12 +57,47 @@
</example>
</para>
<para>
- With <acronym>JPG</acronym> images, two extras index are returned:
- <literal>channel</literal> and <literal>bits</literal>.
- <literal>channel</literal> will be 3 for RGB pictures, and 4 for CMYK
+ With <acronym>JPG</acronym> images, two extras index are returned :
+ <literal>channels</literal> and <literal>bits</literal>.
+ <literal>channels</literal> will be 3 for RGB pictures, and 4 for CMYK
pictures. <literal>bits</literal> is the number of bits for each color.
</para>
<para>
+ Since PHP 4.3 <literal>bits</literal> and <literal>channels</literal>
+ are present for other image types, too. But these values or there
+ presence can be a bit confusing. As example <acronym>GIF<acronym>
+ allways uses 3 channels per pixel but the number of bits per pixel
+ cannot be computed for an animated <acronym>GIF<acronym> with a global
+ colortable.
+ </para>
+ <para>
+ Some formats may contain no image or multiple images. In such cases
+ GetImageSize might not be able to determine the size and returns zero
+ for width and height.
+ </para>
+ <para>
+ Since PHP 4.3 GetImageSize() does also return the additional
+ <literal>mime</literal> that receives the mime-type ot the image.
+ This information can be used to deliver images with correct http
+ Content-type header if this is unknown:
+ <example>
+ <title>getimagesize and mime-type</title>
+ <programlisting role="php">
+<![CDATA[
+<?php
+$size = getimagesize ($filename);
+$fp=fopen($filename, "rb");
+if ($size && $fp) {
+ header("Content-type: {$size['mime']}");
+ fpassthru($fp);
+ exit;
+} else // error
+?>
+]]>
+ </programlisting>
+ </example>
+ </para>
+ <para>
If accessing the <parameter>filename</parameter> image is impossible,
or if it isn't a valid picture, <function>getimagesize</function>
will return &null; and generate a warning.
@@ -99,7 +136,8 @@
This function does not require the GD image library.
</simpara>
<simpara>
- See also <function>exif_imagetype</function>,
<function>exif_read_data</function>
+ See also <function>image_type_to_mime_type</function>,
+ <function>exif_imagetype</function>, <function>exif_read_data</function>
and <function>exif_thumbnail</function>.
</simpara>
<simpara>
Index: phpdoc/en/reference/image/functions/image_type_to_mime_type.xml
+++ phpdoc/en/reference/image/functions/image_type_to_mime_type.xml
<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.1 $ -->
<!-- splitted from ./en/functions/image.xml, last change in rev 1.36 -->
<refentry id="function.image_type_to_mime_type">
<refnamediv>
<refname>image_type_to_mime_type</refname>
<refpurpose>Get Mime-Type for image-type returned by getimagesize,
exif_read_data, exif_thumbnail, exif_imagetype</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>string </type><methodname>image_type_to_mime_type</methodname>
<methodparam><type>int</type><parameter>imagetype</parameter></methodparam>
</methodsynopsis>
<para>
The <function>image_type_to_mime_type</function> function will determine
the Mime-Type for an IMAGETYPE constant.
<example>
<title>image_type_to_mime_type (file)</title>
<programlisting role="php">
<![CDATA[
<?php
header ("Content-type: ".image_type_to_mime_type (IMAGETYPE_PNG));
?>
]]>
</programlisting>
</example>
</para>
<para>
<note>
<simpara>
This function does not require the GD image library.
</simpara>
<simpara>
See also <function>getimagesize</function>,
<function>exif_imagetype</function>, <function>exif_read_data</function>
and <function>exif_thumbnail</function>.
</simpara>
</note>
</para>
</refsect1>
</refentry>
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vim: et tw=78 syn=sgml
vi: ts=1 sw=1
-->
--
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