shell_exec may return false(#821)

php · Jul 26, 2021 · 3678d8e · 3678d8e
1 parent 42d9fe8
commit 3678d8e
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/reference/exec/functions/shell-exec.xml b/reference/exec/functions/shell-exec.xml
@@ -45,8 +45,9 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   The output from the executed command or &null; if an error occurred or the
-   command produces no output.
+   The output from the executed command, &false; if the pipe can't be established
+   or &null; if an error occurred or the command produces no output. When &false;
+   is returned, an error of level E_WARNING is also generated.
   </para>
   <note>
    <para>