diff --git a/lib/php/src/transport/TBufferedTransport.php b/lib/php/src/transport/TBufferedTransport.php
index eb76167..2682569 100644
--- a/lib/php/src/transport/TBufferedTransport.php
+++ b/lib/php/src/transport/TBufferedTransport.php
@@ -131,8 +131,13 @@
   public function write($buf) {
     $this->wBuf_ .= $buf;
     if (strlen($this->wBuf_) >= $this->wBufSize_) {
-      $this->transport_->write($this->wBuf_);
+      $out = $this->wBuf_;
+
+      // Note that we clear the internal wBuf_ prior to the underlying write
+      // to ensure we're in a sane state (i.e. internal buffer cleaned)
+      // if the underlying write throws up an exception
       $this->wBuf_ = '';
+      $this->transport_->write($out);
     }
   }
 
diff --git a/lib/php/src/transport/TFramedTransport.php b/lib/php/src/transport/TFramedTransport.php
index e2f8d6b..2c7a344 100644
--- a/lib/php/src/transport/TFramedTransport.php
+++ b/lib/php/src/transport/TFramedTransport.php
@@ -158,9 +158,13 @@
 
     $out = pack('N', strlen($this->wBuf_));
     $out .= $this->wBuf_;
+
+    // Note that we clear the internal wBuf_ prior to the underlying write
+    // to ensure we're in a sane state (i.e. internal buffer cleaned)
+    // if the underlying write throws up an exception
+    $this->wBuf_ = '';
     $this->transport_->write($out);
     $this->transport_->flush();
-    $this->wBuf_ = '';
   }
 
 }