Disable preview option if PHP does not support it.

htdocs/admin/ihm.php

@@ -162,14 +162,17 @@ if (isset($_GET["action"]) && $_GET["action"] == 'edit')
 	print '<td width="20">&nbsp;</td>';
 	print '</tr>';
 
-    // Activer onglet preview
-    $var=!$var;
-    print '<tr '.$bc[$var].'><td width="35%">'.$langs->trans("UsePreviewTabs").'</td><td>';
-    print $html->selectyesno('main_use_preview_tabs',isset($conf->global->MAIN_USE_PREVIEW_TABS)?$conf->global->MAIN_USE_PREVIEW_TABS:0,1);
-    print '</td>';
-	print '<td width="20">&nbsp;</td>';
-	print '</tr>';
-    
+    // Activate previeuw tab on element card
+    if (function_exists("imagick_readimage"))
+	{
+	    $var=!$var;
+	    print '<tr '.$bc[$var].'><td width="35%">'.$langs->trans("UsePreviewTabs").'</td><td>';
+	    print $html->selectyesno('main_use_preview_tabs',isset($conf->global->MAIN_USE_PREVIEW_TABS)?$conf->global->MAIN_USE_PREVIEW_TABS:0,1);
+	    print '</td>';
+		print '<td width="20">&nbsp;</td>';
+		print '</tr>';
+	}
+	
     print '</table><br>';
 
 
@@ -294,13 +297,16 @@ else
 	print '<td width="20">&nbsp;</td>';
 	print "</tr>";
 
-    // Activer onglet preview
-    $var=!$var;
-    print '<tr '.$bc[$var].'><td width="35%">'.$langs->trans("UsePreviewTabs").'</td><td>';
-    print yn(isset($conf->global->MAIN_USE_PREVIEW_TABS)?$conf->global->MAIN_USE_PREVIEW_TABS:0)."</td>";
-	print '<td width="20">&nbsp;</td>';
-	print "</tr>";
-
+    // Activate previeuw tab on element card
+    if (function_exists("imagick_readimage"))
+	{
+		$var=!$var;
+	    print '<tr '.$bc[$var].'><td width="35%">'.$langs->trans("UsePreviewTabs").'</td><td>';
+	    print yn(isset($conf->global->MAIN_USE_PREVIEW_TABS)?$conf->global->MAIN_USE_PREVIEW_TABS:0)."</td>";
+		print '<td width="20">&nbsp;</td>';
+		print "</tr>";
+	}
+	
     print '</table><br>';