diff --git a/scripts/_common.sh b/scripts/_common.sh
index 599c71e..9934791 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -4,6 +4,12 @@
 # COMMON VARIABLES
 #=================================================
 
+# Define a function to execute commands with `php_exec`
+php_exec() {
+  (cd "$install_dir" && ynh_exec_as "$app" \
+      php${phpversion} "$install_dir/bin/console" --no-interaction --env=prod "$@")
+}
+
 #=================================================
 # PERSONAL HELPERS
 #=================================================
diff --git a/scripts/install b/scripts/install
index 359b84b..fc4b7cb 100644
--- a/scripts/install
+++ b/scripts/install
@@ -45,22 +45,19 @@ ynh_add_config --template="parameters.yml" --destination="$install_dir/app/confi
 chmod 600 "$install_dir/app/config/parameters.yml"
 chown "$app:$app" "$install_dir/app/config/parameters.yml"
 
-# Alias for php-cli execution command
-php_exec=("php$phpversion" "$install_dir/bin/console" --no-interaction --env=prod)
-
 # Install dependencies and Wallabag
-ynh_exec_warn_less ynh_exec_as "$app" "${php_exec[@]}" wallabag:install
+php_exec wallabag:install
 
 # Add users to Wallabag
 for username in $(ynh_user_list); do
     user_email=$(ynh_user_get_info --username="$username" --key=mail)
     # We don't care about that thanks to LDAP
     user_pass=$(ynh_string_random)
-    ynh_exec_as "$app" "${php_exec[@]}" fos:user:create "$username" "$user_email" "$user_pass"
+    php_exec fos:user:create "$username" "$user_email" "$user_pass"
 done
 
 # Set admin user
-ynh_exec_as "$app" "${php_exec[@]}" fos:user:promote --super "$admin"
+php_exec fos:user:promote --super "$admin"
 
 # Configure Wallabag instance URL
 ynh_mysql_connect_as --user="$db_user" --password="$db_pwd" --database="$db_name" \
diff --git a/scripts/upgrade b/scripts/upgrade
index 916c9ca..e040482 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -32,12 +32,9 @@ fi
 #=================================================
 ynh_script_progression --message="Reconfiguring $app..." --weight=1
 
-# Alias for php-cli execution command
-php_exec=("php$phpversion" "$install_dir/bin/console" --no-interaction --env=prod)
-
 # Upgrade database and clear the cache
-ynh_exec_as "$app" "${php_exec[@]}" doctrine:migrations:migrate
-ynh_exec_as "$app" "${php_exec[@]}" cache:clear
+php_exec doctrine:migrations:migrate
+php_exec cache:clear
 
 # Configure Wallabag instance URL
 ynh_mysql_connect_as --user="$db_user" --password="$db_pwd" --database="$db_name" \