diff --git a/lib/VM/HashTable.php b/lib/VM/HashTable.php
index 40dd2b889b5..0abb56f6e54 100755
--- a/lib/VM/HashTable.php
+++ b/lib/VM/HashTable.php
@@ -581,10 +581,11 @@ private function rehash(): void {
         if ($this->isWithoutHoles()) {
             do {
                 $bucket = $this->buckets->read($bucketIndex);
-                $index = $bucket->hash;
-                $bucket->value->next = $index;
-                $this->indexes->write($index, $bucketIndex);
+                $hash = $bucket->hash;
+                $bucket->value->next = $this->indexes->read($hash);
+                $this->indexes->write($hash, $bucketIndex);
             } while (++$bucketIndex < $this->numUsed);
+
             return;
         }
         //todo
diff --git a/lib/Web/DevServer.php b/lib/Web/DevServer.php
index 10f64acd554..1171cf7abea 100644
--- a/lib/Web/DevServer.php
+++ b/lib/Web/DevServer.php
@@ -193,19 +193,32 @@ public static function handleConnection($conn, string $docroot, callable $handle
      */
     public static function readRequest($conn): ?array
     {
-        $lines = '';
+        $buf = '';
         while (!feof($conn)) {
-            $chunk = fgets($conn);
-            if (false === $chunk) {
+            $chunk = fread($conn, 8192);
+            if (false === $chunk || '' === $chunk) {
                 break;
             }
-            $lines .= $chunk;
-            if ("\r\n" === $chunk) {
+            $buf .= $chunk;
+            if (str_contains($buf, "\r\n\r\n") || str_contains($buf, "\n\n")) {
                 break;
             }
         }
 
-        if (!preg_match('#^(\S+)\s+(\S+)\s+(HTTP/\S+)#', $lines, $m)) {
+        $headerEnd = strpos($buf, "\r\n\r\n");
+        $sepLen = 4;
+        if (false === $headerEnd) {
+            $headerEnd = strpos($buf, "\n\n");
+            $sepLen = 2;
+        }
+        if (false === $headerEnd) {
+            return null;
+        }
+
+        $headerBlock = substr($buf, 0, $headerEnd);
+        $body = substr($buf, $headerEnd + $sepLen);
+
+        if (!preg_match('#^(\S+)\s+(\S+)\s+(HTTP/\S+)#', $headerBlock, $m)) {
             return null;
         }
 
@@ -219,7 +232,7 @@ public static function readRequest($conn): ?array
         }
 
         $headers = [];
-        foreach (explode("\r\n", $lines) as $line) {
+        foreach (preg_split("/\r\n|\n/", $headerBlock) as $line) {
             if ('' === $line || false === strpos($line, ':')) {
                 continue;
             }
@@ -227,11 +240,17 @@ public static function readRequest($conn): ?array
             $headers[strtolower(trim($name))] = trim($value);
         }
 
-        $body = '';
         if (isset($headers['content-length'])) {
             $len = (int) $headers['content-length'];
             while (strlen($body) < $len && !feof($conn)) {
-                $body .= fread($conn, $len - strlen($body));
+                $chunk = fread($conn, $len - strlen($body));
+                if (false === $chunk || '' === $chunk) {
+                    break;
+                }
+                $body .= $chunk;
+            }
+            if (strlen($body) > $len) {
+                $body = substr($body, 0, $len);
             }
         }
 
diff --git a/lib/Web/Superglobals.php b/lib/Web/Superglobals.php
index 98831beca11..7ea3b02c00c 100644
--- a/lib/Web/Superglobals.php
+++ b/lib/Web/Superglobals.php
@@ -72,6 +72,7 @@ public static function populateFromEnvironment(
         );
         self::populateServer($context, $queryString, $postBody);
         self::populateRequest($context);
+        self::$activeContext = null;
     }
 
     /**
diff --git a/test/real/ServeAotTest.php b/test/real/ServeAotTest.php
index 20bc20cc7ef..81145d84801 100644
--- a/test/real/ServeAotTest.php
+++ b/test/real/ServeAotTest.php
@@ -162,6 +162,48 @@ public function testServeAotPopulatesContentLengthOnPost(): void
         @rmdir($binaryDir);
     }
 
+    public function testServeAotPostFormUrlencoded(): void
+    {
+        $docroot = $this->makeDocroot([
+            'form.php' => <<<'PHP'
+<?php
+declare(strict_types=1);
+header('Content-Type: text/plain; charset=UTF-8');
+echo 'name=', $_POST['name'];
+PHP,
+        ]);
+        $binaryDir = sys_get_temp_dir().'/phpc_serve_aot_post_'.bin2hex(random_bytes(4));
+        $this->assertTrue(mkdir($binaryDir));
+        $binary = $binaryDir.'/app';
+        $this->compileExample($docroot.'/form.php', $binary);
+        $response = $this->httpPostAot($docroot, $binary, '/form.php', 'name=Alice');
+        $this->assertStringContainsString('HTTP/1.1 200', $response);
+        $this->assertStringContainsString('name=Alice', $response);
+        @unlink($binary);
+        @rmdir($binaryDir);
+    }
+
+    public function testServeAotHttpResponseCode404SetsStatusLine(): void
+    {
+        $docroot = $this->makeDocroot([
+            'notfound.php' => <<<'PHP'
+<?php
+declare(strict_types=1);
+http_response_code(404);
+echo 'missing';
+PHP,
+        ]);
+        $binaryDir = sys_get_temp_dir().'/phpc_serve_aot_404_'.bin2hex(random_bytes(4));
+        $this->assertTrue(mkdir($binaryDir));
+        $binary = $binaryDir.'/app';
+        $this->compileExample($docroot.'/notfound.php', $binary);
+        $response = $this->httpGetAot($docroot, $binary, '/notfound.php');
+        $this->assertStringContainsString('HTTP/1.1 404', $response);
+        $this->assertStringContainsString('missing', $response);
+        @unlink($binary);
+        @rmdir($binaryDir);
+    }
+
     public function testServeAotHttpResponseCode405SetsStatusLine(): void
     {
         $docroot = $this->makeDocroot([
diff --git a/test/real/ServeTest.php b/test/real/ServeTest.php
index c5b3bc34b62..489e4bd18d3 100644
--- a/test/real/ServeTest.php
+++ b/test/real/ServeTest.php
@@ -249,6 +249,20 @@ public function testPopulatesContentLengthOnPost(): void
     $this->assertStringContainsString('12', $response);
   }
 
+  public function testPostFormUrlencoded(): void
+  {
+    $docroot = $this->makeDocroot([
+      'form.php' => <<<'PHP'
+<?php
+header('Content-Type: text/plain; charset=UTF-8');
+echo 'name=', $_POST['name'];
+PHP,
+    ]);
+    $response = $this->httpPost($docroot, '/form.php', 'name=Alice');
+    $this->assertStringContainsString('HTTP/1.1 200', $response);
+    $this->assertStringContainsString('name=Alice', $this->responseBody($response));
+  }
+
   /**
    * @param array<string, string> $extraEnv
    * @param list<string>          $extraRequestHeaders
diff --git a/test/unit/VM/HashTableTest.php b/test/unit/VM/HashTableTest.php
index bc5074dd4bd..b154ee47618 100755
--- a/test/unit/VM/HashTableTest.php
+++ b/test/unit/VM/HashTableTest.php
@@ -143,6 +143,33 @@ public function testFindOnUninitializedReturnsNull(): void
         $this->assertNull($ht->findIndex(0));
     }
 
+    /** Regression: rehash must chain buckets (issue #248 POST / $_SERVER population). */
+    public function testAddManyStringKeysIncludingContentLength(): void
+    {
+        $ht = new HashTable();
+        $keys = [
+            'REQUEST_METHOD' => 'POST',
+            'QUERY_STRING' => '',
+            'SCRIPT_NAME' => '/index.php',
+            'PHP_SELF' => '/index.php',
+            'REQUEST_URI' => '/index.php',
+            'GATEWAY_INTERFACE' => 'CGI/1.1',
+            'SERVER_PROTOCOL' => 'HTTP/1.1',
+            'SERVER_SOFTWARE' => 'PHP-Compiler-VM',
+            'CONTENT_LENGTH' => '0',
+        ];
+        foreach ($keys as $name => $value) {
+            $var = new Variable(Variable::TYPE_STRING);
+            $var->string($value);
+            $this->assertNotNull($ht->add($name, $var), 'add failed for '.$name);
+        }
+        foreach ($keys as $name => $value) {
+            $found = $ht->find($name);
+            $this->assertNotNull($found, 'find failed for '.$name);
+            $this->assertSame($value, $found->resolveIndirect()->toString());
+        }
+    }
+
     private function int(int $value): Variable
     {
         $var = new Variable();
diff --git a/test/unit/Web/DevServerHeadersTest.php b/test/unit/Web/DevServerHeadersTest.php
index 5403ccc9eb6..442c684160e 100644
--- a/test/unit/Web/DevServerHeadersTest.php
+++ b/test/unit/Web/DevServerHeadersTest.php
@@ -97,4 +97,31 @@ public function testParsePeerAddressRejectsInvalid(): void
         $this->assertNull(DevServer::parsePeerAddress('no-port'));
         $this->assertNull(DevServer::parsePeerAddress('[::1]'));
     }
+
+    public function testReadRequestPostBodyWithoutTrailingNewline(): void
+    {
+        $pair = stream_socket_pair(STREAM_PF_UNIX, STREAM_SOCK_STREAM, STREAM_IPPROTO_IP);
+        if (false === $pair) {
+            $this->markTestSkipped('stream_socket_pair unavailable');
+        }
+        [$server, $client] = $pair;
+        $raw = "POST /form.php HTTP/1.1\r\n"
+            ."Host: 127.0.0.1\r\n"
+            ."Content-Type: application/x-www-form-urlencoded\r\n"
+            ."Content-Length: 10\r\n"
+            ."Connection: close\r\n\r\n"
+            .'name=Alice';
+        fwrite($client, $raw);
+        stream_socket_shutdown($client, STREAM_SHUT_WR);
+        fclose($client);
+
+        $parsed = DevServer::readRequest($server);
+        fclose($server);
+
+        $this->assertNotNull($parsed);
+        $this->assertSame('POST', $parsed[0]);
+        $this->assertSame('/form.php', $parsed[1]);
+        $this->assertSame('name=Alice', $parsed[4]);
+        $this->assertSame('10', $parsed[3]['content-length'] ?? null);
+    }
 }