photoshop_file_info.php

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                /***************************************/

                // Check the Artist Name Tag - it contains the author
                if ( array_key_exists( 315, $Exif_array[0] ) )
                {
                        $outputarray = add_to_field( $outputarray, 'author' , HTML_UTF8_UnEscape( $Exif_array[0][315]['Data'][0] ), "\n" );
                }

        }


        /***************************/

        // FINISHED RETRIEVING INFORMATION

        // Perform final processing


        // Check if any urgency information was found
        if ( $outputarray["urgency"] == "" )
        {
                // No urgency information was found - set it to default (None)
                $outputarray["urgency"] = "none";
        }

        // Check if any copyrightstatus information was found
        if ( $outputarray["copyrightstatus"] == "" )
        {
                // No copyrightstatus information was found - set it to default (Unmarked)
                $outputarray["copyrightstatus"] = "unmarked";
        }

        // Return the resulting Photoshop File Info Array
        return $outputarray;

}

/******************************************************************************
* End of Function:     get_photoshop_file_info
******************************************************************************/






/******************************************************************************
*
* Function:     put_photoshop_file_info
*
* Description:  Stores Photoshop 'File Info' metadata in the same way that Photoshop
*               does. The 'File Info' metadata must be in an array similar to that
*               returned by get_photoshop_file_info, as follows:
*
*               $file_info_array = array(
*                       "title"                  => "",
*                       "author"                 => "",
*                       "authorsposition"        => "",      // Note: Not used in Photoshop 7 or higher
*                       "caption"                => "",
*                       "captionwriter"          => "",
*                       "jobname"                => "",      // Note: Not used in Photoshop CS
*                       "copyrightstatus"        => "",
*                       "copyrightnotice"        => "",
*                       "ownerurl"               => "",
*                       "keywords"               => array( 0 => "", 1 => "", ... ),
*                       "category"               => "",     // Note: Max 3 characters
*                        "supplementalcategories" => array( 0 => "", 1 => "", ... ),
*                       "date"                   => "",     // Note: DATE MUST BE IN YYYY-MM-DD format
*                       "city"                   => "",
*                       "state"                  => "",
*                       "country"                => "",
*                       "credit"                 => "",
*                       "source"                 => "",
*                       "headline"               => "",
*                       "instructions"           => "",
*                       "transmissionreference"  => "",
*                       "urgency"                => "" );
*
* Parameters:   jpeg_header_data - a JPEG header data array in the same format
*                                  as from get_jpeg_header_data. This contains the
*                                  header information which is to be updated.
*               new_ps_file_info_array - An array as above, which contains the
*                                        'File Info' metadata information to be
*                                        written.
*               Old_Exif_array - an array containing the EXIF information to be
*                                updated, as retrieved by get_EXIF_JPEG. (saves having to parse the EXIF again)
*               Old_XMP_array - an array containing the XMP information to be
*                               updated, as retrieved by read_XMP_array_from_text. (saves having to parse the XMP again)
*               Old_IRB_array - an array containing the Photoshop IRB information
*                                to be updated, as retrieved by get_Photoshop_IRB. (saves having to parse the IRB again)
*
* Returns:      jpeg_header_data - a JPEG header data array in the same format
*                                  as from get_jpeg_header_data, containing the
*                                  Photshop 'File Info' metadata. This can then
*                                  be written to a file using put_jpeg_header_data.
*
******************************************************************************/

function put_photoshop_file_info( $jpeg_header_data, $new_ps_file_info_array, $Old_Exif_array, $Old_XMP_array, $Old_IRB_array )
{
        /*******************************************/
        // PREPROCESSING

        // Check that the date is in the correct format (YYYY-MM-DD)

        // Explode the date into pieces using the - symbol
        $date_pieces = explode( "-", $new_ps_file_info_array[ 'date' ] );

        // If there are not 3 pieces to the date, it is invalid
        if ( count( $date_pieces ) != 3 )
        {
                // INVALID DATE
                echo "Invalid Date - must be YYYY-MM-DD format<br>";
                return FALSE;
        }

        // Cycle through each piece of the date
        foreach( $date_pieces as $piece )
        {
                // If the piece is not numeric, then the date is invalid.
                if ( ! is_numeric( $piece ) )
                {
                        // INVALID DATE
                        echo "Invalid Date - must be YYYY-MM-DD format<br>";
                        return FALSE;
                }
        }

        // Make a unix timestamp at midnight on the date specified
        $date_stamp = mktime( 0,0,0, $date_pieces[1], $date_pieces[2], $date_pieces[0] );




        // Create a translation table to remove carriage return characters
        $trans = array( "\x0d" => "" );

        // Cycle through each of the File Info elements
        foreach( $new_ps_file_info_array as $valkey => $val )
        {
                // If the element is 'Keywords' or 'Supplemental Categories', then
                // it is an array, and needs to be treated as one
                if ( ( $valkey != 'supplementalcategories' ) && ( $valkey != 'keywords' ) )
                {
                        // Not Keywords or Supplemental Categories
                        // Convert escaped HTML characters to UTF8 and remove carriage returns
                        $new_ps_file_info_array[ $valkey ] = strtr( HTML_UTF8_UnEscape( $val ), $trans );
                }
                else
                {
                        // Either Keywords or Supplemental Categories
                        // Cycle through the array,
                        foreach( $val as $subvalkey => $subval )
                        {
                                // Convert escaped HTML characters to UTF8 and remove carriage returns
                                $new_ps_file_info_array[ $valkey ][ $subvalkey ] = strtr( HTML_UTF8_UnEscape( $subval ), $trans );
                        }
                }
        }





        /*******************************************/

        // EXIF Processing


        // Check if the EXIF array exists
        if( $Old_Exif_array == FALSE )
        {
                // EXIF Array doesn't exist - create a new one
                $new_Exif_array = array (       'Byte_Align' => "MM",
                                                'Makernote_Tag' => false,
                                                'Tags Name' => "TIFF",
                                                 0 => array( "Tags Name" => "TIFF" ) );
        }
        else
        {
                // EXIF Array Does Exist - use it
                $new_Exif_array = $Old_Exif_array;
        }



        // Update the EXIF Image Description Tag with the new value
        $new_Exif_array[0][270] = array (       "Tag Name"   => $GLOBALS[ "IFD_Tag_Definitions" ]['TIFF'][ 270 ]['Name'],
                                                "Tag Number" => 270,
                                                "Data Type"  => 2,
                                                "Type"       => $GLOBALS[ "IFD_Tag_Definitions" ]['TIFF'][ 270 ]['Type'],
                                                "Data"       => array( HTML_UTF8_Escape( $new_ps_file_info_array[ 'caption' ]) ));

        // Update the EXIF Artist Name Tag with the new value
        $new_Exif_array[0][315] = array (       "Tag Name"   => $GLOBALS[ "IFD_Tag_Definitions" ]['TIFF'][ 315 ]['Name'],
                                                "Tag Number" => 315,
                                                "Data Type"  => 2,
                                                "Type"       => $GLOBALS[ "IFD_Tag_Definitions" ]['TIFF'][ 315 ]['Type'],
                                                "Data"       => array( HTML_UTF8_Escape( $new_ps_file_info_array[ 'author' ] ) ) );

        // Update the EXIF Copyright Information Tag with the new value
        $new_Exif_array[0][33432] = array (     "Tag Name"   => $GLOBALS[ "IFD_Tag_Definitions" ]['TIFF'][ 33432 ]['Name'],
                                                "Tag Number" => 33432,
                                                "Data Type"  => 2,
                                                "Type"       => $GLOBALS[ "IFD_Tag_Definitions" ]['TIFF'][ 33432 ]['Type'],
                                                "Data"       => array( HTML_UTF8_Escape( $new_ps_file_info_array[ 'copyrightnotice' ]) ) );


        // Photoshop checks if the "Date and Time of Original" and "Date and Time when Digitized" tags exist
        // If they don't exist, it means that the EXIF date may be wiped out if it is changed, so Photoshop
        // copies the EXIF date to these two tags

        if ( ( array_key_exists( 306, $new_Exif_array[0] ) )&&
             ( array_key_exists( 34665, $new_Exif_array[0] ) ) &&
             ( array_key_exists( 0, $new_Exif_array[0][34665] ) ) )
        {
                // Replace "Date and Time of Original" if it doesn't exist
                if ( ! array_key_exists( 36867, $new_Exif_array[0][34665][0] ) )
                {
                        $new_Exif_array[0][34665][0][36867] = array (       "Tag Name"   => $GLOBALS[ "IFD_Tag_Definitions" ]['EXIF'][ 36867 ]['Name'],
                                                "Tag Number" => 36867,
                                                "Data Type"  => 2,
                                                "Type"       => $GLOBALS[ "IFD_Tag_Definitions" ]['EXIF'][ 36867 ]['Type'],
                                                "Data"       => $new_Exif_array[0][306]['Data'] );
                }

                // Replace "Date and Time when Digitized" if it doesn't exist
                if ( ! array_key_exists( 36868, $new_Exif_array[0][34665][0] ) )
                {
                        $new_Exif_array[0][34665][0][36868] = array (       "Tag Name"   => $GLOBALS[ "IFD_Tag_Definitions" ]['EXIF'][ 36868 ]['Name'],
                                                "Tag Number" => 36868,
                                                "Data Type"  => 2,
                                                "Type"       => $GLOBALS[ "IFD_Tag_Definitions" ]['EXIF'][ 36868 ]['Type'],
                                                "Data"       => $new_Exif_array[0][306]['Data'] );
                }
        }


        // Photoshop changes the EXIF date Tag (306) to the current date, not the date that was entered in File Info
        $exif_date = date ( "Y:m:d H:i:s" );

        // Update the EXIF Date and Time Tag with the new value
        $new_Exif_array[0][306] = array (       "Tag Name"   => $GLOBALS[ "IFD_Tag_Definitions" ]['TIFF'][ 306 ]['Name'],
                                                "Tag Number" => 306,
                                                "Data Type"  => 2,
                                                "Type"       => $GLOBALS[ "IFD_Tag_Definitions" ]['TIFF'][ 306 ]['Type'],
                                                "Data"       => array( $exif_date ) );



        // Photoshop replaces the EXIF Software or Firmware Tag with "Adobe Photoshop ..."
        // This toolkit instead preserves existing value and appends the toolkit name to the end of it

        // Check if the EXIF Software or Firmware Tag exists
        if ( array_key_exists( 305, $new_Exif_array[0] ) )
        {
                // An existing EXIF Software or Firmware Tag was found
                // Check if the existing Software or Firmware Tag already contains the Toolkit's name
                if ( stristr ( $new_Exif_array[0][305]['Data'][0], $GLOBALS[ "Software Name" ]) == FALSE )
                {
                        // Toolkit Name string not found in the existing Software/Firmware string - append it.
                        $firmware_str = $new_Exif_array[0][305]['Data'][0] . " " . $GLOBALS[ "Software Name" ];
                }
                else
                {
                        // Toolkit name already exists in Software/Firmware string - don't put another copy in the string