Declare version array as associative

Author: wrobelda

bin/generate.sh

@@ -1,5 +1,4 @@
 #!/usr/bin/env bash
-
 #
 # Generates Dockerfiles for specified PHP versions
 #
@@ -12,9 +11,12 @@ php_versions=( "8.1" "8.0" "7.4" "7.2" )
 # final source image will be generated as follow: php:7.2-cli, php:7-2-apache and php:7.2-fpm
 php_docker_suffix=( "cli" "apache" "fpm" )
 
+# Enforce associative handling of the array to avoid arithmetic errors
+# May not be supported by all shells flavors or their older versions
+declare -A xdebug_versions
+
 # Map of xdebug versions for PHP images
 # PHP_VERSION => XDEBUG_VERSION
-declare -A xdebug_versions
 xdebug_versions=(
     ["8.1"]="xdebug-3.1.3"
     ["8.0"]="xdebug-3.1.3"