diff --git a/htdocs/public/test/test_exec.php b/htdocs/public/test/test_exec.php
new file mode 100644
index 00000000000..f805cc19b5c
--- /dev/null
+++ b/htdocs/public/test/test_exec.php
@@ -0,0 +1,91 @@
+<?php
+if (!defined('NOREQUIREUSER')) {
+	define('NOREQUIREUSER', '1');
+}
+if (!defined('NOREQUIREDB')) {
+	define('NOREQUIREDB', '1');
+}
+if (!defined('NOREQUIRESOC')) {
+	define('NOREQUIRESOC', '1');
+}
+if (!defined('NOREQUIRETRAN')) {
+	define('NOREQUIRETRAN', '1');
+}
+if (!defined('NOSTYLECHECK')) {
+	define('NOSTYLECHECK', '1'); // Do not check style html tag into posted data
+}
+if (!defined('NOCSRFCHECK')) {
+	define('NOCSRFCHECK', '1'); // Do not check anti CSRF attack test
+}
+if (!defined('NOTOKENRENEWAL')) {
+	define('NOTOKENRENEWAL', '1'); // Do not check anti POST attack test
+}
+if (!defined('NOREQUIREMENU')) {
+	define('NOREQUIREMENU', '1'); // If there is no need to load and show top and left menu
+}
+if (!defined('NOREQUIREHTML')) {
+	define('NOREQUIREHTML', '1'); // If we don't need to load the html.form.class.php
+}
+if (!defined('NOREQUIREAJAX')) {
+	define('NOREQUIREAJAX', '1'); // Do not load ajax.lib.php library
+}
+if (!defined("NOLOGIN")) {
+	define("NOLOGIN", '1'); // If this page is public (can be called outside logged session)
+}
+// If you don't need session management (can't be logged if no session used). You must also set
+// NOCSRFCHECK, NOTOKENRENEWAL, NOLOGIN
+// Disable module with GETPOST('disablemodules') won't work. Variable 'dol_...' will not be set.
+// $_SESSION are then simple vars if sessions are not active.
+// TODO We can close session with session_write_close() as soon as we just need read access everywhere in code.
+if (!defined("NOSESSION")) {
+	define("NOSESSION", '1');
+}
+
+print "Legend:<br>\n";
+print 'PHP_SESSION_DISABLED='.PHP_SESSION_DISABLED."<br>\n";
+print 'PHP_SESSION_NONE='.PHP_SESSION_NONE."<br>\n";
+print 'PHP_SESSION_ACTIVE='.PHP_SESSION_ACTIVE."<br>\n";
+print '<br>';
+
+print 'session_status='.session_status().' (before main.inc.php)';
+print '<br>';
+
+require '../../main.inc.php';
+
+// Security
+if ($dolibarr_main_prod) {
+	accessforbidden();
+}
+
+
+/*
+ * View
+ */
+
+echo "Test<br>\n";
+$out='';
+$ret=0;
+
+$file = '/tmp/test.txt';
+$f=fopen($file, 'r');
+if ($f) {
+	$s=fread($f, 4096);
+	print $s;
+	fclose($f);
+} else {
+	print "Failed to open file ".$file."<br>\n";
+}
+
+print '<br><br>'."\n";
+
+exec('cat /test.txt; ls /dev/std*; sleep 1;', $out, $ret);
+print $ret."<br>\n";
+print_r($out);
+
+print '<br><br>'."\n";
+
+$ret = 0;
+$out = null;
+exec('/usr/bin/clamdscan --fdpass filethatdoesnotexists.php', $out, $ret);
+print $ret."<br>\n";
+print_r($out);