https://git.php.net/?p=php-src.git;a=commit;h=f27f9022660d28c13c6209f4679768dcbd961b43

--- a/ext/standard/iptc.c
+++ b/ext/standard/iptc.c
@@ -273,7 +273,7 @@ PHP_FUNCTION(iptcembed)
 					iptcdata_len++; /* make the length even */
 				}
 
-				psheader[ 2 ] = (char) (iptcdata_len+28)>>8;
+				psheader[ 2 ] = (char) ((iptcdata_len+28)>>8);
 				psheader[ 3 ] = (iptcdata_len+28)&0xff;
 
 				for (inx = 0; inx < 28; inx++) {
--- /dev/null
+++ b/ext/standard/tests/image/iptcembed_002.phpt
@@ -0,0 +1,110 @@
+--TEST--
+iptcembed() valid jpg stream
+--FILE--
+<?php
+/*
+# source code to generate base64 use behind as $base64_1x1_jpeg
+# we don't want to be gd library dependant for this test
+$file="1x1.jpg";
+$ret=imagejpeg(imagecreatetruecolor(1, 1), $file, 100);
+echo md5(file_get_contents($file)).PHP_EOL;
+echo base64_encode(file_get_contents($file)).PHP_EOL;
+unlink($file);
+*/
+
+/*
+test description :
+1) create local file 1x1 jpeg (without iptc) (use base64 content to create file)
+2) generate iptcdata string with function iptc_make_tag describe behind
+3) use iptcembed php function with our 1x1 jpeg file and our iptcdata string
+4) write local file2 with iptcembed return content
+5) various check on file2 to verify that's a valid jpeg file with our tags
+*/
+
+
+#iptc_make_tag function from http://php.net/iptcembed
+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 . $value;
+  }
+
+
+$file="1x1.jpg";
+$file2="1x1_with_iptc_tags.jpg";
+$base64_1x1_jpeg="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";
+#write file
+$fd=fopen($file,"wb");
+if ($fd) { fputs($fd,base64_decode($base64_1x1_jpeg)); fclose($fd); }
+else { echo "error cant write $file".PHP_EOL;exit(1); }
+#check file md5
+$md5=md5_file($file);
+if ($md5!="07dd8594450e8c18ab8a79d7cb4573c7") { echo "md5 error".PHP_EOL;exit(1); }
+#check jpeg properties
+list($width, $height, $type, $attr) = getimagesize($file,$info);
+if ($width!=1) { echo "width error".PHP_EOL;exit(1); }
+if ($height!=1) { echo "height error".PHP_EOL;exit(1); }
+if ($type!=2) { echo "type error".PHP_EOL;exit(1); }
+if (!isset($info["APP0"])) { echo "APP0 error".PHP_EOL;exit(1); }
+
+#our iptc tags
+$tags=array();
+$tags["2#105"]= "Tauren";
+$tags["2#120"]= "Tauren with Trunk";
+$tags["2#110"]= "Copyright 2004-2016, Blizzard";
+$tags["2#025"]= "Tauren, Chaman, Blizzard";
+$tags["2#090"]= "Thunder Bluffs";
+#feed iptc string for iptcembed
+$iptc='';
+foreach ($tags as $tag => $string) { $rec=$tag[0]; $tag = substr($tag, 2); $iptc .= iptc_make_tag($rec, $tag, $string); }
+#check iptc string md5
+if (md5(base64_encode($iptc))!="7056c4b3060f92a4f9e5b7d0caa61859") { echo "iptc md5 error".PHP_EOL;exit(1); }
+
+#use iptcembed to get jpeg stream content with iptc tags
+$content = iptcembed($iptc, $file,0);
+
+#write new image with iptc tags
+if ($content === false) {echo "iptcembed error".PHP_EOL;exit(1); }
+$fd=fopen($file2,"wb");
+if ($fd) { fputs($fd,$content); fclose($fd); }
+else { echo "error cant write $file2".PHP_EOL;exit(1); }
+
+
+#check jpeg properties for new image with iptc tags
+echo "new generated image with itpc tags : $file2".PHP_EOL;
+$ret = getimagesize($file2,$info);
+if ($ret===false) { echo "getimagesize error".PHP_EOL;exit(1); }
+list($width, $height, $type, $attr) = $ret;
+if ($width!=1) { echo "width error".PHP_EOL;exit(1); }
+if ($height!=1) { echo "height error".PHP_EOL;exit(1); }
+if ($type!=2) { echo "type error".PHP_EOL;exit(1); }
+if (!isset($info["APP0"])) { echo "APP0 error".PHP_EOL;exit(1); }
+if (!isset($info["APP13"])) { echo "APP13 error".PHP_EOL;exit(1); }
+
+$error=0;
+$iptc_data_from_created_image = iptcparse($info['APP13']);
+foreach ($tags as $tag => $string) {
+  #check if tag exists
+  if (!isset($iptc_data_from_created_image[$tag])) {
+    echo "error iptc tag $tag not found".PHP_EOL;
+    $error++;
+  } else {
+    #check value
+    if ($iptc_data_from_created_image[$tag][0]!=$string) {
+      echo "error tag $tag : bad value ($string != ".$iptc_data_from_created_image[$tag][0].")".PHP_EOL;
+      $error++;
+    }
+  }
+}
+#clean before exit
+@unlink($file);
+@unlink($file2);
+if ($error==0) { echo "OK".PHP_EOL;exit(0);}
+echo "something wrong: $error errors".PHP_EOL;
+?>
+--EXPECT--
+new generated image with itpc tags : 1x1_with_iptc_tags.jpg
+OK
--