iptcembed

(PHP 4, PHP 5, PHP 7, PHP 8)

iptcembed — Embeds binary IPTC data into a JPEG image

Beschreibung

iptcembed(string$iptc_data, string$filename, int$spool = 0): string|bool

Embeds binary IPTC data into a JPEG image.

Parameter-Liste

iptc_data: The data to be written.
filename: 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.

Rückgabewerte

If spool is less than 2, the JPEG will be returned, Bei einem Fehler wird false zurückgegeben.. Otherwise returns true on success Bei einem Fehler wird false zurückgegeben..

Beispiele

Beispiel #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);
?>

Anmerkungen

Hinweis:
Diese Funktion benötigt die GD-Bibliothek nicht.