diff --git a/install_roundcube.sh b/install_roundcube.sh
index 9bd5382..1b8102e 100755
--- a/install_roundcube.sh
+++ b/install_roundcube.sh
@@ -293,10 +293,17 @@ fi
 
 # - Determin PHP of all installed versions
 # -
-echononl "\tGet major version of all installed PHP versions"
 if $PHP_DEBIAN_INSTALLATION ; then
+   echononl "\tGet major version of installed PHP"
    php_major_version="$(php --version | head -1 | cut -d' ' -f2 | cut -d '-' -f1 | cut -d'.' -f1,2)"
+   if [[  -z "$php_major_version" ]]; then
+      echo_failed
+      error "Getting major version of installed PHP versions failed! No installed PHP versiond found!"
+   else
+      echo_ok
+   fi
 else
+   echononl "\tGet major version of all installed PHP versions"
    php_major_versions=`find /usr/local/ -maxdepth 1 -mindepth 1 -type l -name "php-*" -print | cut -d "-" -f2 | sort`
    if [[  -z "$php_major_versions" ]]; then
       echo_failed
diff --git a/upgrade_roundcube.sh b/upgrade_roundcube.sh
index fa4e149..064aff0 100755
--- a/upgrade_roundcube.sh
+++ b/upgrade_roundcube.sh
@@ -357,8 +357,14 @@ fi
 # - Determin PHP of all installed versions
 # -
 if $PHP_DEBIAN_INSTALLATION ; then
-   echononl "   Get installed PHP versions"
+   echononl "   Get get major version installed PHP"
    php_major_version="$(php --version | head -1 | cut -d' ' -f2 | cut -d '-' -f1 | cut -d'.' -f1,2)"
+   if [[  -z "$php_major_version" ]]; then
+      echo_failed
+      error "Getting version numbers of installed PHP versions failed! No installed PHP versiond found!"
+   else
+      echo_ok
+   fi
 else
    echononl "   Get major version of all installed PHP versions"
    php_major_versions="$(find /usr/local/ -maxdepth 1 -mindepth 1 -type l -name "php-*" -print | cut -d "-" -f2 | sort)"