diff --git a/caca-php/examples/cacainfo.php b/caca-php/examples/cacainfo.php
index 51d83a5..f13c9fa 100755
--- a/caca-php/examples/cacainfo.php
+++ b/caca-php/examples/cacainfo.php
@@ -46,6 +46,9 @@ EOT;
 }
 	
 
+if (!posix_isatty(STDOUT))
+	die("You have to run this program with php-cli!\n");
+
 just_for_fun();
 
 //--- Show caca's information ---//
diff --git a/caca-php/examples/demo.php b/caca-php/examples/demo.php
index 83b8d95..e656826 100644
--- a/caca-php/examples/demo.php
+++ b/caca-php/examples/demo.php
@@ -359,6 +359,10 @@ function demo_triangles($cv, $bounds, $outline) {
 function demo_render($cv, $bounds, $outline) {
 }
 
+
+if (!posix_isatty(STDOUT))
+	die("You have to run this program with php-cli!\n");
+
 main();
 
 ?>
diff --git a/caca-php/examples/dithering.php b/caca-php/examples/dithering.php
index 22661f9..ffb39a2 100755
--- a/caca-php/examples/dithering.php
+++ b/caca-php/examples/dithering.php
@@ -11,6 +11,9 @@
  *  http://sam.zoy.org/wtfpl/COPYING for more details.
  */
 
+if (!posix_isatty(STDOUT))
+	die("You have to run this program with php-cli!\n");
+
 $img = imagecreatefrompng(dirname(__FILE__)."/logo-caca.png");
 if (!$img) 
 	die("Can not open image.\n");
@@ -27,6 +30,6 @@ if (!$display)
 caca_dither_bitmap($canvas, 0, 0, caca_get_canvas_width($canvas), caca_get_canvas_height($canvas), $dither, $img);
 caca_refresh_display($display);
 
-caca_get_event($display, CACA_EVENT_KEY_PRESS, 5000000);
+caca_get_event($display, CACA_EVENT_KEY_PRESS, -1);
 
 ?>
diff --git a/caca-php/examples/figfont.php b/caca-php/examples/figfont.php
index 3da90c6..3519634 100755
--- a/caca-php/examples/figfont.php
+++ b/caca-php/examples/figfont.php
@@ -23,6 +23,8 @@ function unistr_to_ords($str, $encoding = 'UTF-8'){
 	return $result;
 }
 
+if (!posix_isatty(STDOUT))
+	die("You have to run this program with php-cli!\n");
 
 if ($argc < 3) {
 	die("Too few arguments.\nUsage: cmd <path of font> <utf8 string>\n");
diff --git a/caca-php/examples/polyline.php b/caca-php/examples/polyline.php
index a52dbcf..680950c 100755
--- a/caca-php/examples/polyline.php
+++ b/caca-php/examples/polyline.php
@@ -18,6 +18,9 @@ function transform($tbl, $tx, $ty, $sx, $sy) {
 	return $result;
 }
 
+if (!posix_isatty(STDOUT))
+	die("You have to run this program with php-cli!\n");
+
 $canvas = caca_create_canvas(0, 0);
 $display = caca_create_display($canvas);
 if (!$display) {
diff --git a/caca-php/examples/text.php b/caca-php/examples/text.php
index 7973f7b..8f5e8a0 100755
--- a/caca-php/examples/text.php
+++ b/caca-php/examples/text.php
@@ -15,6 +15,9 @@
  *  http://sam.zoy.org/wtfpl/COPYING for more details.
  */
 
+if (!posix_isatty(STDOUT))
+	die("You have to run this program with php-cli!\n");
+
 $string =  <<<EOT
               |_| 
    _,----._   | |