Description:
------------
In page http://www.php.net/exif_read_data, it was said:

arrays specifies whether or not each section becomes an array. The sections FILE, COMPUTED and THUMBNAIL allways become arrays as they may contain values whose names are conflict with other sections.

However, in current CVS of PHP source, file 'ext/exif/exif.c' shows:

add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_FILE       TSRMLS_CC);
add_assoc_image_info(return_value, 1,          &ImageInfo, SECTION_COMPUTED   TSRMLS_CC);
add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_ANY_TAG    TSRMLS_CC);
add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_IFD0       TSRMLS_CC);
add_assoc_image_info(return_value, 1,          &ImageInfo, SECTION_THUMBNAIL  TSRMLS_CC);
add_assoc_image_info(return_value, 1,          &ImageInfo, SECTION_COMMENT    TSRMLS_CC);
add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_EXIF       TSRMLS_CC);
add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_GPS        TSRMLS_CC);
add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_INTEROP    TSRMLS_CC);
add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_FPIX       TSRMLS_CC);
add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_APP12      TSRMLS_CC);
add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_WINXP      TSRMLS_CC);
add_assoc_image_info(return_value, sub_arrays, &ImageInfo, SECTION_MAKERNOTE  TSRMLS_CC);

I suppose it means sections COMPUTED, THUMBNAIL and COMMENT will always become array, but not FILE section.  A sample code proved this.

Reproduce code:
---------------
<?php
$image_data = exif_read_data('somefile.jpg');
print_r($image_data);
?>


Expected result:
----------------
Array
(
    [FileName] => h.jpg
    [FileDateTime] => 1061726541
    [FileSize] => 103018
    [SectionsFound] => ANY_TAG, IFD0, THUMBNAIL, EXIF, INTEROP
    [COMPUTED] => Array
        (
            [html] => width="1024" height="768"
            [Height] => 768
            [Width] => 1024
            [IsColor] => 1
            [ApertureFNumber] => f/3.4
            [UserComment] =>  
            [UserCommentEncoding] => UNDEFINED
        )
...