diff --git a/reference/phar/Phar/extractTo.xml b/reference/phar/Phar/extractTo.xml
index 59d34b8ada0e..525e842ae2e8 100644
--- a/reference/phar/Phar/extractTo.xml
+++ b/reference/phar/Phar/extractTo.xml
@@ -25,6 +25,16 @@
    set to true to enable overwriting of files.
    This method is similar to <function>ZipArchive::extractTo</function>.
   </para>
+
+  <warning>
+    <simpara>
+      Extraction follows any existing symlinks in the target
+      <parameter>directory</parameter>. If there is a symlink to some other
+      directory, files may be extracted outside of the desired location; if
+      there is a symlink to a file, the target of the symlink will be
+      overwritten when <parameter>overwrite</parameter> is true.
+    </simpara>
+  </warning>
  </refsect1>
 
  <refsect1 role="parameters">
diff --git a/reference/phar/PharData/extractTo.xml b/reference/phar/PharData/extractTo.xml
index 2b95f74b40d3..f71bdc5952bf 100644
--- a/reference/phar/PharData/extractTo.xml
+++ b/reference/phar/PharData/extractTo.xml
@@ -25,6 +25,16 @@
    set to true to enable overwriting of files.
    This method is similar to <function>ZipArchive::extractTo</function>.
   </para>
+
+  <warning>
+    <simpara>
+      Extraction follows any existing symlinks in the target
+      <parameter>directory</parameter>. If there is a symlink to some other
+      directory, files may be extracted outside of the desired location; if
+      there is a symlink to a file, the target of the symlink will be
+      overwritten when <parameter>overwrite</parameter> is true.
+    </simpara>
+  </warning>
  </refsect1>
 
  <refsect1 role="parameters">