diff --git a/php/monoformat.php b/php/monoformat.php
new file mode 100644
index 0000000..777ed64
--- /dev/null
+++ b/php/monoformat.php
@@ -0,0 +1,201 @@
+<?php
+
+namespace monoformat {
+
+enum SectionType : int {
+    case AlwaysDrawn = 1;
+    case TimeBasedDrawn = 2;
+    case CustomFont = 32;
+}
+
+enum ElementType : int {
+    case Image = 1;
+    case Animation = 2;
+    case HScrollImage = 3;
+    case VScrollImage = 4;
+    case Line = 5;
+    case ClippedText = 16;
+    case HScrollText = 17;
+    case CurrentTime = 32;
+}
+
+enum LineStyle : int {
+    case Solid = 0;
+}
+
+class Element {
+    public function serialize() {
+        return "";
+    }
+}
+
+class HScrollTextElement extends Element {
+    public $x = 0;
+    public $y = 0;
+    public $width = 0;
+    public $height = 0;
+    public $flags = 0;
+    public $scrollSpeed = 0;
+    public $fontIndex = 0;
+    public $text = "";
+
+    public function serialize() {
+        $len = strlen($this->text);
+        $result = pack("vvvvvCCvv",
+                       17,
+                       $this->x,
+                       $this->y,
+                       $this->width,
+                       $this->height,
+                       $this->flags,
+                       $this->scrollSpeed,
+                       $this->fontIndex,
+                       $len);
+        $result .= (string) $this->text;
+        if ($len % 4 != 0) {
+            $n = 4 - ($len % 4);
+            for ($i = 0; $i < $n; ++$i) {
+                $result .= chr(0);
+            }
+        }
+        return $result;
+    }
+}
+
+class CurrentTimeElement extends Element {
+    public $x = 0;
+    public $y = 0;
+    public $width = 0;
+    public $height = 0;
+    public $fontIndex = 0;
+    public $utcOffset = 0;
+    public $flags = 0;
+
+    public function serialize() {
+        $result = pack("vvvvvvvv",
+                       32,
+                       $this->x,
+                       $this->y,
+                       $this->width,
+                       $this->height,
+                       $this->fontIndex,
+                       $this->utcOffset,
+                       $this->flags);
+        return $result;
+    }
+}
+
+class Section {
+    public function serialize() {
+        return "";
+    }
+}
+
+class AlwaysDrawnSection extends Section {
+    public $drawOnFront = false;
+    public $drawOnBack = false;
+    public $clearBeforeDrawing = false;
+    public $elements = [];
+
+    public function serialize() {
+        $flags = 0;
+        if ($this->drawOnFront) {
+            $flags |= 0x01;
+        }
+        if ($this->drawOnBack) {
+            $flags |= 0x02;
+        }
+        if ($this->clearBeforeDrawing) {
+            $flags |= 0x04;
+        }
+        $inner = pack("vv", $flags, count($this->elements));
+        foreach ($this->elements as $element) {
+            $inner .= $element->serialize();
+        }
+        $len = strlen($inner) + 4;
+        $len = substr(pack("V", $len), 0, 3);
+        return pack("C", 1) . $len . $inner;
+    }
+}
+
+class File {
+    public $sections = [];
+
+    public function serialize() {
+        $nSections = count($this->sections);
+        $result = "\xAF\x7E\x2B\x63";
+        $result .= pack("Vvv", 1, $nSections, 0);
+        foreach ($this->sections as $section) {
+            $result .= $section->serialize();
+        }
+        return $result;
+    }
+}
+
+} // namespace monoformat
+
+namespace {
+
+$roomName= "BOOL";
+
+$data = json_decode(file_get_contents("https://cfp.cttue.de/tdf5/schedule/export/schedule.json"), true);
+$talks = [];
+$now = new DateTimeImmutable("now");
+foreach ($data["schedule"]["conference"]["days"] as $day) {
+    foreach ($day["rooms"][$roomName] as $t) {
+        [$h, $m] = explode(":", $t["duration"]);
+        $duration = $h * 3600 + $m * 60;
+        $duration = DateInterval::createFromDateString("$duration sec");
+        $talk = [
+            "date" => new DateTimeImmutable($t["date"]),
+            "duration" => $duration,
+            "title" => $t["title"],
+        ];
+        $talkEnd = $talk["date"]->add($talk["duration"]);
+        if ($talkEnd < $now) {
+            continue;
+        }
+        if ($talk["date"] > $now && count($talks) > 2) {
+            break;
+        }
+        array_push($talks, $talk);
+    }
+}
+
+$elements = [];
+
+function putText($x, $y, $width, $height, $text) {
+    global $elements;
+
+    $e = new monoformat\HScrollTextElement();
+    $e->x = $x;
+    $e->y = $y;
+    $e->width = $width;
+    $e->height = $height;
+    $e->flags = 0;
+    $e->scrollSpeed = 15;
+    $e->fontIndex = 0;
+    $e->text = $text;
+    array_push($elements, $e);
+}
+
+$i = 0;
+foreach ($talks as $talk) {
+    putText(10, $i * 20, 25, 20, $talk["date"]->format("H:i"));
+    putText(35, $i * 20, 85, 20, $talk["title"]);
+    ++$i;
+}
+
+$section = new monoformat\AlwaysDrawnSection();
+$section->drawOnFront = true;
+$section->drawOnBack = true;
+$section->clearBeforeDrawing = true;
+$section->elements = $elements;
+
+$file = new monoformat\File();
+array_push($file->sections, $section);
+
+print($file->serialize());
+} // global
+
+?>