diff --git a/isbn/b3kat.php b/isbn/b3kat.php
index 0f6a78f..c5819a8 100644
--- a/isbn/b3kat.php
+++ b/isbn/b3kat.php
@@ -28,7 +28,7 @@
 
 include 'lib.php';
 
-$id = yaz_connect(B3KAT_URL, array("user" => B3KAT_USER, "password" => B3KAT_PASSWORD));//"mab2; charset=iso5426,utf8"
+$id = yaz_connect(B3KAT_URL, array("user" => B3KAT_USER, "password" => B3KAT_PASSWORD)); //"mab2; charset=iso5426,utf8"
 yaz_syntax($id, B3KAT_SYNTAX);
 yaz_range($id, 1, 10);
 yaz_element($id, B3KAT_ELEMENTSET);
@@ -41,10 +41,10 @@
 if (isset($_GET['isbn'])) {
     $n = trim($_GET['isbn']);
     $nArray = explode(",", $n);
-    if (count($nArray)>1) {
+    if (count($nArray) > 1) {
         //mehrere ISBNs, z.B. f @or @or @attr 1=7 "9783937219363" @attr 1=7 "9780521369107" @attr 1=7 "9780521518147"
         //Anfuehrungsstriche muessen demaskiert werden, egal ob String mit ' gemacht wird
-        $suchString = str_repeat("@or ", count($nArray)-1) . '@attr 1=7 \"' . implode('\" @attr 1=7 \"', $nArray) . '\"';
+        $suchString = str_repeat("@or ", count($nArray) - 1) . '@attr 1=7 \"' . implode('\" @attr 1=7 \"', $nArray) . '\"';
         yaz_search($id, "rpn", $suchString);
     } else {
         yaz_search($id, "rpn", '@attr 5=100 @attr 1=7 "' . $n . '"');
@@ -57,7 +57,7 @@
 $error = yaz_error($id);
 if (!empty($error)) {
     echo "Error Number: " . yaz_errno($id);
-    echo "Error Description: " . $error ;
+    echo "Error Description: " . $error;
     echo "Additional Error Information: " . yaz_addinfo($id);
 }
 
@@ -67,23 +67,23 @@
 
 
 for ($p = 1; $p <= yaz_hits($id); $p++) {
-    $record = yaz_record($id, $p, "render;charset=iso5426,utf8");//render;charset=iso5426,utf8
-    $recordArray =  explode("\x1e", $record);
+    $record = yaz_record($id, $p, "render;charset=iso5426,utf8"); //render;charset=iso5426,utf8
+    $recordArray = explode("\x1e", $record);
     $header = substr($recordArray[0], 0, 24);
-    $recordContent = '<datensatz id="" typ="'.substr($header, 23, 1).'" status="'.substr($header, 5, 1).'" mabVersion="'.substr($header, 6, 4).'">'."\n";
+    $recordContent = '<datensatz id="" typ="' . substr($header, 23, 1) . '" status="' . substr($header, 5, 1) . '" mabVersion="' . substr($header, 6, 4) . '">' . "\n";
     $recordContent .= printLine(substr($recordArray[0], 24));
 
     for ($j = 1; $j < count($recordArray); $j++) {
         $recordContent .= printLine($recordArray[$j]);
     }
 
-    $recordContent .=  '</datensatz>'."\n";
-    $outputString .=  $recordContent;
+    $recordContent .= '</datensatz>' . "\n";
+    $outputString .= $recordContent;
     array_push($outputArray, $recordContent);
 
 }
 
-$outputString .=  "</datei>";
+$outputString .= "</datei>";
 yaz_close($id);
 
 $map = $standardMabMap;
@@ -93,7 +93,7 @@
     header('Content-type: text/xml');
     echo $outputString;
 
-} else if ($_GET['format']=='json') {
+} else if ($_GET['format'] == 'json') {
 
     $outputXml = simplexml_load_string($outputString);
     $outputMap = performMapping($map, $outputXml);
diff --git a/isbn/hebis.php b/isbn/hebis.php
index a4187fd..9a7df16 100644
--- a/isbn/hebis.php
+++ b/isbn/hebis.php
@@ -29,7 +29,7 @@
 include 'lib.php';
 
 $id = yaz_connect(HEBIS_URL);
-yaz_syntax($id, HEBIS_SYNTAX);//
+yaz_syntax($id, HEBIS_SYNTAX); //
 yaz_range($id, 1, 10);
 yaz_element($id, HEBIS_ELEMENTSET); //
 
@@ -43,7 +43,7 @@
     if (count($nArray) > 1) {
         //mehrere ISBNs, z.B. f @or @or @attr 1=7 "9783937219363" @attr 1=7 "9780521369107" @attr 1=7 "9780521518147"
         //Anfuehrungsstriche muessen demaskiert werden, egal ob String mit ' gemacht wird
-        $suchString = str_repeat("@or ", count($nArray)-1) . '@attr 1=7 \"' . implode('\" @attr 1=7 \"', $nArray) . '\"';
+        $suchString = str_repeat("@or ", count($nArray) - 1) . '@attr 1=7 \"' . implode('\" @attr 1=7 \"', $nArray) . '\"';
         yaz_search($id, "rpn", $suchString);
     } else {
         yaz_search($id, "rpn", '@attr 5=100 @attr 1=7 "' . $n . '"');
@@ -55,7 +55,7 @@
 $error = yaz_error($id);
 if (!empty($error)) {
     echo "Error Number: " . yaz_errno($id);
-    echo "Error Description: " . $error ;
+    echo "Error Description: " . $error;
     echo "Additional Error Information: " . yaz_addinfo($id);
 }
 
@@ -64,13 +64,13 @@
 $outputArray = [];
 
 for ($p = 1; $p <= yaz_hits($id); $p++) {
-    $record = yaz_record($id, $p, "xml");//Umwandlung in XML
+    $record = yaz_record($id, $p, "xml"); //Umwandlung in XML
     //namespace löschen
     $record = str_replace('xmlns="http://www.loc.gov/MARC21/slim"', '', $record);
-    $outputString .=  $record;
+    $outputString .= $record;
     array_push($outputArray, $record);
 }
-$outputString .=  "</collection>";
+$outputString .= "</collection>";
 yaz_close($id);
 
 $map = $standardMarcMap;
@@ -80,7 +80,7 @@
 if (!isset($_GET['format'])) {
     header('Content-type: text/xml');
     echo $outputString;
-} else if ($_GET['format']=='json') {
+} else if ($_GET['format'] == 'json') {
     $outputXml = simplexml_load_string($outputString);
     $outputMap = performMapping($map, $outputXml);
     $outputIndividualMap = [];
diff --git a/isbn/lib.php b/isbn/lib.php
index 943d267..7443d2c 100644
--- a/isbn/lib.php
+++ b/isbn/lib.php
@@ -229,14 +229,14 @@ function printLine($line)
         $ind = substr($line, 3, 1);
         $inhalt = substr($line, 4);
         if (strstr($inhalt, "\x1f")) {
-            $lineArray =  explode("\x1f", $inhalt);
+            $lineArray = explode("\x1f", $inhalt);
             $output .= "<feld nr='$nr' ind='$ind'>\n";
             for ($k = 1; $k < count($lineArray); $k++) {
-                    $output .= '<uf code="'.substr($lineArray[$k], 0, 1).'">'.printMabContent(substr($lineArray[$k], 1)).'</uf>'."\n";
+                    $output .= '<uf code="' . substr($lineArray[$k], 0, 1) . '">' . printMabContent(substr($lineArray[$k], 1)) . '</uf>' . "\n";
             }
             $output .= "</feld>";
         } else {
-            $output .= '<feld nr="'.$nr.'" ind="'.$ind.'">'.printMabContent($inhalt).'</feld>'."\n";
+            $output .= '<feld nr="' . $nr . '" ind="' . $ind . '">' . printMabContent($inhalt) . '</feld>' . "\n";
         }
     }
     return $output;
diff --git a/isbn/man-sru.php b/isbn/man-sru.php
index edcc5fb..d1a59d5 100644
--- a/isbn/man-sru.php
+++ b/isbn/man-sru.php
@@ -62,7 +62,7 @@
 @$doc->loadHTML($result);
 $xpath = new DOMXPath($doc);
 
-$records = $xpath->query("//records/record/recorddata/record");//beachte: kein CamelCase sondern alles klein schreiben
+$records = $xpath->query("//records/record/recorddata/record"); //beachte: kein CamelCase sondern alles klein schreiben
 
 $outputString = "<?xml version=\"1.0\"?>\n";
 $outputString .= "<collection>\n";
@@ -70,10 +70,10 @@
 
 foreach ($records as $record) {
 
-    $outputString .=  $doc->saveXML($record);
+    $outputString .= $doc->saveXML($record);
     array_push($outputArray, $doc->saveXML($record));
 }
-$outputString .=  "</collection>";
+$outputString .= "</collection>";
 
 
 $map = $standardMarcMap;
@@ -82,7 +82,7 @@
 if (!isset($_GET['format'])) {
     header('Content-type: text/xml');
     echo $outputString;
-} else if ($_GET['format']=='json') {
+} else if ($_GET['format'] == 'json') {
     $outputXml = simplexml_load_string($outputString);
 
     $outputMap = performMapping($map, $outputXml);
@@ -97,7 +97,7 @@
 
     header('Content-type: application/json');
     echo json_encode($outputMap, JSON_PRETTY_PRINT);
-} else if ($_GET['format']=='holdings') {
+} else if ($_GET['format'] == 'holdings') {
     echo "<html>\n<head>\n	<title>Bestand UB Mannheim zu ISBN-Suche</title>\n	<meta http-equiv='content-type' content='text/html; charset=UTF-8' />\n	<style type='text/css'>body { font-family:  Arial, Verdana, sans-serif; }</style>\n</head>\n<body>\n";
     $outputXml = simplexml_load_string($outputString);
     $avaNodes = $outputXml->xpath('//datafield[@tag="AVA"]');
@@ -149,7 +149,7 @@
 
         echo '<div>Bestand der UB Mannheim: ';
         foreach ($bestand as $loc => $n) {
-            echo $n . "x" . $loc .  ", ";
+            echo $n . "x" . $loc . ", ";
         }
         if ($aveNodes) {
             echo "E";
@@ -177,17 +177,17 @@
         echo '<div>Bestand der UB Mannheim: eventuell da (' . $size . ")</div>\n";
         echo '<table><tr><td><a href="' . $urlMAN . '" taget="_blank">See SRU Result</a></td></tr></table>';
     } else {
-        $urlSWB='http://swb.bsz-bw.de/DB=2.1/SET=11/TTL=2/CMD?ACT=SRCHM&ACT0=SRCH&IKT0=2135&TRM0=%60180%60&ACT1=*&IKT1=1016&TRM1=' . str_replace(" ", "+", $suchStringSWB);
+        $urlSWB = 'http://swb.bsz-bw.de/DB=2.1/SET=11/TTL=2/CMD?ACT=SRCHM&ACT0=SRCH&IKT0=2135&TRM0=%60180%60&ACT1=*&IKT1=1016&TRM1=' . str_replace(" ", "+", $suchStringSWB);
         $contentSWB = utf8_decode(file_get_contents($urlSWB));
         //echo $contentSWB;
-        if (strpos($contentSWB, "Es wurde nichts gefunden")===false) {
+        if (strpos($contentSWB, "Es wurde nichts gefunden") === false) {
             $nhits = substr_count($contentSWB, 'class="hit"');
             if ($nhits !== 0) {//multiple results
-                $nhits = $nhits/2;
+                $nhits = $nhits / 2;
             } else {//single result
                 $nhits = substr_count($contentSWB, 'class="Z3988"');
             }
-            echo '<div>Bestand der UB Mannheim: SWB sagt ja (' . $nhits .' Treffer)</div>';
+            echo '<div>Bestand der UB Mannheim: SWB sagt ja (' . $nhits . ' Treffer)</div>';
             
         } else {
             echo 'Es wurde nichts gefunden';
diff --git a/isbn/nebis.php b/isbn/nebis.php
index 0e2d95d..259a547 100644
--- a/isbn/nebis.php
+++ b/isbn/nebis.php
@@ -43,7 +43,7 @@
     if (count($nArray) > 1) {
         //mehrere ISBNs, z.B. f @or @or @attr 1=7 "9783937219363" @attr 1=7 "9780521369107" @attr 1=7 "9780521518147"
         //Anfuehrungsstriche muessen demaskiert werden, egal ob String mit ' gemacht wird
-        $suchString = str_repeat("@or ", count($nArray)-1) . '@attr 1=7 \"' . implode('\" @attr 1=7 \"', $nArray) . '\"';
+        $suchString = str_repeat("@or ", count($nArray) - 1) . '@attr 1=7 \"' . implode('\" @attr 1=7 \"', $nArray) . '\"';
         yaz_search($id, "rpn", $suchString);
     } else {
         yaz_search($id, "rpn", '@attr 5=100 @attr 1=7 "' . $n . '"');
@@ -56,7 +56,7 @@
 $error = yaz_error($id);
 if (!empty($error)) {
     echo "Error Number: " . yaz_errno($id);
-    echo "Error Description: " . $error ;
+    echo "Error Description: " . $error;
     echo "Additional Error Information: " . yaz_addinfo($id);
 }
 
@@ -68,10 +68,10 @@
     $record = yaz_record($id, $p, "xml");
     //namespace löschen
     $record = str_replace('xmlns="http://www.loc.gov/MARC21/slim"', '', $record);
-    $outputString .=  $record;
+    $outputString .= $record;
     array_push($outputArray, $record);
 }
-$outputString .=  "</collection>";
+$outputString .= "</collection>";
 
 yaz_close($id);
 
@@ -83,7 +83,7 @@
     header('Content-type: text/xml');
     echo $outputString;
 
-} else if ($_GET['format']=='json') {
+} else if ($_GET['format'] == 'json') {
 
     $outputXml = simplexml_load_string($outputString);
     $outputMap = performMapping($map, $outputXml);