diff --git a/.mod_php_install.sh.swp b/.mod_php_install.sh.swp
new file mode 100644
index 0000000..9de26b0
Binary files /dev/null and b/.mod_php_install.sh.swp differ
diff --git a/mod_php_install.sh b/mod_php_install.sh
index 7b211fd..90be44a 100755
--- a/mod_php_install.sh
+++ b/mod_php_install.sh
@@ -80,6 +80,10 @@ echo_skipped() {
    echo -e "\033[75G[ \033[33m\033[1mskipped\033[m ]"
 }
 
+is_int() {
+   return $(test "$@" -eq "$@" > /dev/null 2>&1);
+}
+
 detect_os_1 () {
 
    if $(which lsb_release > /dev/null 2>&1) ; then
@@ -494,11 +498,28 @@ if [ -f "/usr/local/php-${MAJOR_VERSION}/etc/php.ini" ]; then
 fi
 
 MEMORY_LIMIT=""
-echononl "memory_limit in Megabyte !! Append \"M\"? [$_MEMORY_LIMIT] "
-read MEMORY_LIMIT
-if [ "X$MEMORY_LIMIT" = "X" ]; then
-   MEMORY_LIMIT=$_MEMORY_LIMIT
-fi
+while [[ "X$MEMORY_LIMIT" = "X" ]]; do
+   echononl "memory_limit - Append unit \"K\", \"M\" or \"G\" [$_MEMORY_LIMIT] "
+   read MEMORY_LIMIT
+   if [ "X$MEMORY_LIMIT" = "X" ]; then
+      MEMORY_LIMIT=$_MEMORY_LIMIT
+   fi
+   if is_int $MEMORY_LIMIT ; then
+      MEMORY_LIMIT="${MEMORY_LIMIT}M"
+      warn "No unit is given. \"M\" was appended: memory_limit: $MEMORY_LIMIT"
+      continue
+   fi
+   _unit="${MEMORY_LIMIT: -1}"
+   if [[ "$_unit" != "K" ]] && [[ "$_unit" != "M" ]] && [[ "$_unit" != "G" ]]; then
+      warn "Wrong unit was given for memory_limit. Reenter again"
+      MEMORY_LIMIT=""
+      continue
+   fi
+   if ! is_int ${MEMORY_LIMIT::-1} ; then
+      warn "Wrong value for memory_limit. was given. Reenter again"
+      MEMORY_LIMIT=""
+   fi
+done
 
 ## - php.ini: max_execution_time
 if [ -f "/usr/local/php-${MAJOR_VERSION}/etc/php.ini" ]; then
@@ -509,11 +530,17 @@ if [ -f "/usr/local/php-${MAJOR_VERSION}/etc/php.ini" ]; then
 fi
 
 MAX_EXECUTION_TIME=""
-echononl "max_execution_time (in Seconds)  !! insert ONLY the number? [$_MAX_EXECUTION_TIME] "
-read MAX_EXECUTION_TIME
-if [ "X$MAX_EXECUTION_TIME" = "X" ]; then
-   MAX_EXECUTION_TIME=$_MAX_EXECUTION_TIME
-fi
+while [[ "X$MAX_EXECUTION_TIME" = "X" ]]; do
+   echononl "max_execution_time (in Seconds)  !! insert ONLY the number? [$_MAX_EXECUTION_TIME] "
+   read MAX_EXECUTION_TIME
+   if [ "X$MAX_EXECUTION_TIME" = "X" ]; then
+      MAX_EXECUTION_TIME=$_MAX_EXECUTION_TIME
+   fi
+   if ! is_int ${MAX_EXECUTION_TIME} ; then
+      warn "Wrong value for max_execution_time was given. Reenter again"
+      MAX_EXECUTION_TIME=""
+   fi
+done
 
 ## - php.ini: upload_max_filesize
 if [ -f "/usr/local/php-${MAJOR_VERSION}/etc/php.ini" ]; then
@@ -532,11 +559,17 @@ if [ -f "/usr/local/php-${MAJOR_VERSION}/etc/php.ini" ]; then
 fi
 
 MAX_INPUT_TIME=""
-echononl "max_input_time (in Seconds)  !! insert ONLY the number? [$_MAX_INPUT_TIME] "
-read MAX_INPUT_TIME
-if [ "X$MAX_INPUT_TIME" = "X" ]; then
-   MAX_INPUT_TIME=$_MAX_INPUT_TIME
-fi
+while [[ "X$MAX_INPUT_TIME" = "X" ]]; do
+   echononl "max_input_time (in Seconds)  !! insert ONLY the number? [$_MAX_INPUT_TIME] "
+   read MAX_INPUT_TIME
+   if [ "X$MAX_INPUT_TIME" = "X" ]; then
+      MAX_INPUT_TIME=$_MAX_INPUT_TIME
+   fi
+   if ! is_int ${MAX_INPUT_TIME} ; then
+      warn "Wrong value for max_input_time was given. Reenter again"
+      MAX_INPUT_TIME=""
+   fi
+done
 
 ## - php.ini: upload_max_filesize
 if [ -f "/usr/local/php-${MAJOR_VERSION}/etc/php.ini" ]; then
@@ -547,11 +580,28 @@ if [ -f "/usr/local/php-${MAJOR_VERSION}/etc/php.ini" ]; then
 fi
 
 UPLOAD_MAX_FILESIZE=""
-echononl "upload_max_filesize in Megabyte !! Append \"M\"? [$_UPLOAD_MAX_FILESIZE] "
-read UPLOAD_MAX_FILESIZE
-if [ "X$UPLOAD_MAX_FILESIZE" = "X" ]; then
-   UPLOAD_MAX_FILESIZE=$_UPLOAD_MAX_FILESIZE
-fi
+while [[ "X$UPLOAD_MAX_FILESIZE" = "X" ]]; do
+   echononl "upload_max_filesize - Append unit \"K\", \"M\" or \"G\" [$_UPLOAD_MAX_FILESIZE] "
+   read UPLOAD_MAX_FILESIZE
+   if [ "X$UPLOAD_MAX_FILESIZE" = "X" ]; then
+      UPLOAD_MAX_FILESIZE=$_UPLOAD_MAX_FILESIZE
+   fi
+   if is_int $UPLOAD_MAX_FILESIZE ; then
+      UPLOAD_MAX_FILESIZE="${UPLOAD_MAX_FILESIZE}M"
+      warn "No unit is given. \"M\" was appended: upload_max_filesize: $UPLOAD_MAX_FILESIZE"
+      continue
+   fi
+   _unit="${UPLOAD_MAX_FILESIZE: -1}"
+   if [[ "$_unit" != "K" ]] && [[ "$_unit" != "M" ]] && [[ "$_unit" != "G" ]]; then
+      warn "Wrong unit was given for upload_max_filesize Reenter again"
+      UPLOAD_MAX_FILESIZE=""
+      continue
+   fi
+   if ! is_int ${UPLOAD_MAX_FILESIZE::-1} ; then
+      warn "Wrong value for upload_max_filesize was given. Reenter again"
+      UPLOAD_MAX_FILESIZE=""
+   fi
+done
 
 ## - php.ini: post_max_size
 if [ -f "/usr/local/php-${MAJOR_VERSION}/etc/php.ini" ]; then
@@ -562,11 +612,28 @@ if [ -f "/usr/local/php-${MAJOR_VERSION}/etc/php.ini" ]; then
 fi
 
 POST_MAX_SIZE=""
-echononl "post_max_size in Megabyte !! Append \"M\"? [$_POST_MAX_SIZE] "
-read POST_MAX_SIZE
-if [ "X$POST_MAX_SIZE" = "X" ]; then
-   POST_MAX_SIZE=$_POST_MAX_SIZE
-fi
+while [[ "X$POST_MAX_SIZE" = "X" ]]; do
+   echononl "post_max_size -  Append unit \"K\", \"M\" or \"G\" [$_POST_MAX_SIZE] "
+   read POST_MAX_SIZE
+   if [ "X$POST_MAX_SIZE" = "X" ]; then
+      POST_MAX_SIZE=$_POST_MAX_SIZE
+   fi
+   if is_int $POST_MAX_SIZE ; then
+      POST_MAX_SIZE="${POST_MAX_SIZE}M"
+      warn "No unit was given. So I apaended \"M\": post_max_size: $POST_MAX_SIZE"
+      continue
+   fi
+   _unit="${POST_MAX_SIZE: -1}"
+   if [[ "$_unit" != "K" ]] && [[ "$_unit" != "M" ]] && [[ "$_unit" != "G" ]]; then
+      warn "Wrong unit was given for post_max_size. Reenter again"
+      POST_MAX_SIZE=""
+      continue
+   fi
+   if ! is_int ${POST_MAX_SIZE::-1} ; then
+      warn "Wrong value for post_max_size was given. Reenter again"
+      POST_MAX_SIZE=""
+   fi
+done
 
 
 echo ""