iptcembed

(PHP 4, PHP 5, PHP 7)

iptcembed — Embeds binary IPTC data into a JPEG image

Descrierea

iptcembed ( string $iptcdata , string $jpeg_file_name [, int $spool = 0 ] ) : mixed

Embeds binary IPTC data into a JPEG image.

Parametri

iptcdata: The data to be written.
jpeg_file_name: Path to the JPEG image.
spool: Spool flag. If the spool flag is less than 2 then the JPEG will be returned as a string. Otherwise the JPEG will be printed to STDOUT.

Valorile întoarse

If spool is less than 2, the JPEG will be returned, sau FALSE în cazul eșecului. Otherwise returns TRUE on success sau FALSE în cazul eșecului.

Exemple

Example #1 Embedding IPTC data into a JPEG


<?php

// iptc_make_tag() function by Thies C. Arntzen
function iptc_make_tag($rec, $data, $value)
{
    $length = strlen($value);
    $retval = chr(0x1C) . chr($rec) . chr($data);

    if($length < 0x8000)
    {
        $retval .= chr($length >> 8) .  chr($length & 0xFF);
    }
    else
    {
        $retval .= chr(0x80) . 
                   chr(0x04) . 
                   chr(($length >> 24) & 0xFF) . 
                   chr(($length >> 16) & 0xFF) . 
                   chr(($length >> 8) & 0xFF) . 
                   chr($length & 0xFF);
    }

    return $retval . $value;
}

// Path to jpeg file
$path = './phplogo.jpg';

// Set the IPTC tags
$iptc = array(
    '2#120' => 'Test image',
    '2#116' => 'Copyright 2008-2009, The PHP Group'
);

// Convert the IPTC tags into binary code
$data = '';

foreach($iptc as $tag => $string)
{
    $tag = substr($tag, 2);
    $data .= iptc_make_tag(2, $tag, $string);
}

// Embed the IPTC data
$content = iptcembed($data, $path);

// Write the new image data out to the file.
$fp = fopen($path, "wb");
fwrite($fp, $content);
fclose($fp);
?>

Note

Notă:
Această funcție nu necesită biblioteca de prelucrare a imaginilor GD.