diff --git a/lib/php-analyzer.sh b/lib/php-analyzer.sh
index 293b055..0873645 100644
--- a/lib/php-analyzer.sh
+++ b/lib/php-analyzer.sh
@@ -1006,9 +1006,12 @@ calculate_server_memory_capacity() {
     local mysql_status
     local mysql_info
     mysql_info=$(detect_mysql_memory_usage 2>/dev/null)
-    if [ $? -eq 0 ]; then
-        mysql_memory_mb=$(echo "$mysql_info" | cut -d'|' -f3)
+    if [ $? -eq 0 ] && [ -n "$mysql_info" ]; then
+        mysql_memory_mb=$(echo "$mysql_info" | cut -d'|' -f3 || echo "0")
         mysql_status=$(echo "$mysql_info" | cut -d'|' -f4)
+        # Ensure mysql_memory_mb is numeric
+        mysql_memory_mb=${mysql_memory_mb:-0}
+        [ -z "$mysql_memory_mb" ] && mysql_memory_mb=0
         total_required_mb=$((total_required_mb + mysql_memory_mb))
     fi
 
@@ -1028,7 +1031,7 @@ calculate_server_memory_capacity() {
     fi
 
     # Return formatted result - first line is summary
-    if [ "$mysql_memory_mb" -gt 0 ]; then
+    if [ "${mysql_memory_mb:-0}" -gt 0 ]; then
         echo "$total_required_mb|$total_ram_mb|$percentage|$status|$pool_count pools|$total_max_children max_children|MySQL: ${mysql_memory_mb}MB"
     else
         echo "$total_required_mb|$total_ram_mb|$percentage|$status|$pool_count pools|$total_max_children max_children"