98 lines
2.5 KiB
PHP
98 lines
2.5 KiB
PHP
<?php
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function getJpegHeader($filename)
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{
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$file = @fopen($filename, 'rb');
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if (!$file) {
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return FALSE;
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}
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$startOfImage = fread($file, 2);
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if ($startOfImage != "\xFF\xD8") {
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fclose($file);
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return FALSE;
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}
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$result = FALSE;
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do {
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$startOfSegment = fread($file, 1);
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if ($startOfSegment != "\xFF") {
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fclose($file);
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return $result;
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}
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$typeOfSegment = ord(fread($file, 1));
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if ($typeOfSegment === FALSE || $typeOfSegment == 0xDA || $typeOfSegment == 0xD9) { // Start of image or End of image
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fclose($file);
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return $result;
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}
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if ($typeOfSegment < 0xD0 || $typeOfSegment > 0xD7) {
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$size = fread($file, 2);
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if ($size === FALSE) {
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fclose($file);
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return $result;
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}
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$sizeOfSegment = unpack("nV", $size);
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$data = fread($file, $sizeOfSegment['V']-2);
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if ($data === FALSE) {
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fclose($file);
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return $result;
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}
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if ($result === FALSE)
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unset($result);
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$result[] = array("type" => $typeOfSegment, "data" => $data); // Multiple segments can have the same type like Exif and XMP
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}
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} while (!feof($file));
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fclose($file);
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return $result;
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}
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function getIptcBlock($jpegHeader)
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{
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for ($i = 0; $i < count($jpegHeader); $i++) {
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if ($jpegHeader[$i]['type'] == 0xED) {
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if (strncmp($jpegHeader[$i]['data'], "Photoshop 3.0\x00", 14) == 0) {
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return $jpegHeader[$i]['data'];
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}
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}
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}
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return FALSE;
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}
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function getXmpDom($jpegHeader)
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{
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for ($i = 0; $i < count($jpegHeader); $i++) {
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if ($jpegHeader[$i]['type'] == 0xE1) {
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if (strncmp($jpegHeader[$i]['data'], "http://ns.adobe.com/xap/1.0/\x00", 29) == 0) {
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$xmlstr = substr($jpegHeader[$i]['data'], 29);
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$doc = new DOMDocument();
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$doc->loadXML($xmlstr);
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return $doc;
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}
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}
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}
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return FALSE;
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}
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function getXmpValue($dom, $xpathQuery)
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{
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if ($dom === FALSE)
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return null;
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$xpath = new DOMXPath($dom);
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$xpath->registerNamespace('rdf', "http://www.w3.org/1999/02/22-rdf-syntax-ns#");
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$xpath->registerNamespace('photoshop', "http://ns.adobe.com/photoshop/1.0/");
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$xpath->registerNamespace('Iptc4xmpCore', "http://iptc.org/std/Iptc4xmpCore/1.0/xmlns/");
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$xpath->registerNamespace('dc', "http://purl.org/dc/elements/1.1/");
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$xpath->registerNamespace('mediapro', "http://ns.iview-multimedia.com/mediapro/1.0/");
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$nodeList = $xpath->query($xpathQuery);
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$result = "";
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foreach ($nodeList as $node) {
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if (!empty($result))
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$result .= ';';
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$result .= $node->nodeValue;
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}
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return $result;
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}
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