diff --git a/src/Symfony/Bridge/PhpUnit/bin/simple-phpunit.php b/src/Symfony/Bridge/PhpUnit/bin/simple-phpunit.php
index fe776b90d3df..ca79f45ac998 100644
--- a/src/Symfony/Bridge/PhpUnit/bin/simple-phpunit.php
+++ b/src/Symfony/Bridge/PhpUnit/bin/simple-phpunit.php
@@ -12,6 +12,10 @@
 // Please update when phpunit needs to be reinstalled with fresh deps:
 // Cache-Id: 2021-02-04 11:00 UTC
 
+if ('cli' !== \PHP_SAPI && 'phpdbg' !== \PHP_SAPI) {
+    throw new Exception('This script must be run from the command line.');
+}
+
 error_reporting(-1);
 
 global $argv, $argc;
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/bin/check-unused-known-tags.php b/src/Symfony/Bundle/FrameworkBundle/Resources/bin/check-unused-known-tags.php
index ec9ae1f97c0f..024ba08d9551 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/bin/check-unused-known-tags.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/bin/check-unused-known-tags.php
@@ -9,6 +9,10 @@
  * file that was distributed with this source code.
  */
 
+if ('cli' !== \PHP_SAPI) {
+    throw new Exception('This script must be run from the command line.');
+}
+
 require dirname(__DIR__, 6).'/vendor/autoload.php';
 
 use Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\Compiler\UnusedTagsPassUtils;
diff --git a/src/Symfony/Component/ExpressionLanguage/Resources/bin/generate_operator_regex.php b/src/Symfony/Component/ExpressionLanguage/Resources/bin/generate_operator_regex.php
index c86e96252618..72b4d25f56d4 100644
--- a/src/Symfony/Component/ExpressionLanguage/Resources/bin/generate_operator_regex.php
+++ b/src/Symfony/Component/ExpressionLanguage/Resources/bin/generate_operator_regex.php
@@ -9,6 +9,10 @@
  * file that was distributed with this source code.
  */
 
+if ('cli' !== \PHP_SAPI) {
+    throw new Exception('This script must be run from the command line.');
+}
+
 $operators = ['not', '!', 'or', '||', '&&', 'and', '|', '^', '&', '==', '===', '!=', '!==', '<', '>', '>=', '<=', 'not in', 'in', '..', '+', '-', '~', '*', '/', '%', 'matches', '**'];
 $operators = array_combine($operators, array_map('strlen', $operators));
 arsort($operators);
diff --git a/src/Symfony/Component/Intl/Resources/bin/common.php b/src/Symfony/Component/Intl/Resources/bin/common.php
index cf47fa448b03..89d3459143d9 100644
--- a/src/Symfony/Component/Intl/Resources/bin/common.php
+++ b/src/Symfony/Component/Intl/Resources/bin/common.php
@@ -9,6 +9,10 @@
  * file that was distributed with this source code.
  */
 
+if ('cli' !== \PHP_SAPI) {
+    throw new Exception('This script must be run from the command line.');
+}
+
 define('LINE_WIDTH', 75);
 
 define('LINE', str_repeat('-', LINE_WIDTH)."\n");
diff --git a/src/Symfony/Component/Intl/Resources/bin/update-data.php b/src/Symfony/Component/Intl/Resources/bin/update-data.php
index 4fc4b2c13a5c..95a85b4cb3db 100644
--- a/src/Symfony/Component/Intl/Resources/bin/update-data.php
+++ b/src/Symfony/Component/Intl/Resources/bin/update-data.php
@@ -23,6 +23,10 @@
 use Symfony\Component\Intl\Locale;
 use Symfony\Component\Intl\Util\GitRepository;
 
+if ('cli' !== \PHP_SAPI) {
+    throw new Exception('This script must be run from the command line.');
+}
+
 require_once __DIR__.'/common.php';
 require_once __DIR__.'/autoload.php';
 
diff --git a/src/Symfony/Component/Mime/Resources/bin/update_mime_types.php b/src/Symfony/Component/Mime/Resources/bin/update_mime_types.php
index 74a9449c75e8..08c52f7d07cd 100644
--- a/src/Symfony/Component/Mime/Resources/bin/update_mime_types.php
+++ b/src/Symfony/Component/Mime/Resources/bin/update_mime_types.php
@@ -9,6 +9,10 @@
  * file that was distributed with this source code.
  */
 
+if ('cli' !== \PHP_SAPI) {
+    throw new Exception('This script must be run from the command line.');
+}
+
 // load new map
 $data = file_get_contents('https://svn.apache.org/repos/asf/httpd/httpd/trunk/docs/conf/mime.types');
 $new = [];
diff --git a/src/Symfony/Component/Translation/Resources/bin/translation-status.php b/src/Symfony/Component/Translation/Resources/bin/translation-status.php
index fac8acbadca3..53e642c00dca 100644
--- a/src/Symfony/Component/Translation/Resources/bin/translation-status.php
+++ b/src/Symfony/Component/Translation/Resources/bin/translation-status.php
@@ -9,6 +9,10 @@
  * file that was distributed with this source code.
  */
 
+if ('cli' !== \PHP_SAPI) {
+    throw new Exception('This script must be run from the command line.');
+}
+
 $usageInstructions = <<<END
 
   Usage instructions
diff --git a/src/Symfony/Component/VarDumper/Resources/bin/var-dump-server b/src/Symfony/Component/VarDumper/Resources/bin/var-dump-server
index 98c813a0639b..f398fcef72d3 100755
--- a/src/Symfony/Component/VarDumper/Resources/bin/var-dump-server
+++ b/src/Symfony/Component/VarDumper/Resources/bin/var-dump-server
@@ -10,6 +10,10 @@
  * file that was distributed with this source code.
  */
 
+if ('cli' !== PHP_SAPI) {
+    throw new Exception('This script must be run from the command line.');
+}
+
 /**
  * Starts a dump server to collect and output dumps on a single place with multiple formats support.
  *