diff --git a/data/helpers.d/mysql b/data/helpers.d/mysql
index 1dad94e13..39f93891c 100644
--- a/data/helpers.d/mysql
+++ b/data/helpers.d/mysql
@@ -237,24 +237,3 @@ ynh_mysql_remove_db () {
 	fi
 }
 
-# Sanitize a string intended to be the name of a database
-# (More specifically : replace - and . by _)
-#
-# example: dbname=$(ynh_sanitize_dbid $app)
-#
-# usage: ynh_sanitize_dbid --db_name=name
-# | arg: -n, --db_name - name to correct/sanitize
-# | ret: the corrected name
-#
-# Requires YunoHost version 2.2.4 or higher.
-ynh_sanitize_dbid () {
-	# Declare an array to define the options of this helper.
-	local legacy_args=n
-	declare -Ar args_array=( [n]=db_name= )
-	local db_name
-	# Manage arguments with getopts
-	ynh_handle_getopts_args "$@"
-
-	# We should avoid having - and . in the name of databases. They are replaced by _
-	echo ${db_name//[-.]/_}
-}
diff --git a/data/helpers.d/network b/data/helpers.d/network
index d2a34f8d7..0f75cb165 100644
--- a/data/helpers.d/network
+++ b/data/helpers.d/network
@@ -1,39 +1,5 @@
 #!/bin/bash
 
-# Normalize the url path syntax
-#
-# Handle the slash at the beginning of path and its absence at ending
-# Return a normalized url path
-#
-# examples:
-#     url_path=$(ynh_normalize_url_path $url_path)
-#     ynh_normalize_url_path example    # -> /example
-#     ynh_normalize_url_path /example   # -> /example
-#     ynh_normalize_url_path /example/  # -> /example
-#     ynh_normalize_url_path /          # -> /
-#
-# usage: ynh_normalize_url_path --path_url=path_to_normalize
-# | arg: -p, --path_url - URL path to normalize before using it
-#
-# Requires YunoHost version 2.6.4 or higher.
-ynh_normalize_url_path () {
-	# Declare an array to define the options of this helper.
-	local legacy_args=p
-	declare -Ar args_array=( [p]=path_url= )
-	local path_url
-	# Manage arguments with getopts
-	ynh_handle_getopts_args "$@"
-
-	test -n "$path_url" || ynh_die --message="ynh_normalize_url_path expect a URL path as first argument and received nothing."
-	if [ "${path_url:0:1}" != "/" ]; then    # If the first character is not a /
-		path_url="/$path_url"    # Add / at begin of path variable
-	fi
-	if [ "${path_url:${#path_url}-1}" == "/" ] && [ ${#path_url} -gt 1 ]; then    # If the last character is a / and that not the only character.
-		path_url="${path_url:0:${#path_url}-1}"	# Delete the last character
-	fi
-	echo $path_url
-}
-
 # Find a free port and return it
 #
 # example: port=$(ynh_find_port --port=8080)
diff --git a/data/helpers.d/string b/data/helpers.d/string
index 52eede872..fcbc5190d 100644
--- a/data/helpers.d/string
+++ b/data/helpers.d/string
@@ -83,3 +83,59 @@ ynh_replace_special_string () {
 
 	ynh_replace_string --match_string="$match_string" --replace_string="$replace_string" --target_file="$target_file"
 }
+
+# Sanitize a string intended to be the name of a database
+# (More specifically : replace - and . by _)
+#
+# example: dbname=$(ynh_sanitize_dbid $app)
+#
+# usage: ynh_sanitize_dbid --db_name=name
+# | arg: -n, --db_name - name to correct/sanitize
+# | ret: the corrected name
+#
+# Requires YunoHost version 2.2.4 or higher.
+ynh_sanitize_dbid () {
+	# Declare an array to define the options of this helper.
+	local legacy_args=n
+	declare -Ar args_array=( [n]=db_name= )
+	local db_name
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	# We should avoid having - and . in the name of databases. They are replaced by _
+	echo ${db_name//[-.]/_}
+}
+
+# Normalize the url path syntax
+#
+# Handle the slash at the beginning of path and its absence at ending
+# Return a normalized url path
+#
+# examples:
+#     url_path=$(ynh_normalize_url_path $url_path)
+#     ynh_normalize_url_path example    # -> /example
+#     ynh_normalize_url_path /example   # -> /example
+#     ynh_normalize_url_path /example/  # -> /example
+#     ynh_normalize_url_path /          # -> /
+#
+# usage: ynh_normalize_url_path --path_url=path_to_normalize
+# | arg: -p, --path_url - URL path to normalize before using it
+#
+# Requires YunoHost version 2.6.4 or higher.
+ynh_normalize_url_path () {
+	# Declare an array to define the options of this helper.
+	local legacy_args=p
+	declare -Ar args_array=( [p]=path_url= )
+	local path_url
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	test -n "$path_url" || ynh_die --message="ynh_normalize_url_path expect a URL path as first argument and received nothing."
+	if [ "${path_url:0:1}" != "/" ]; then    # If the first character is not a /
+		path_url="/$path_url"    # Add / at begin of path variable
+	fi
+	if [ "${path_url:${#path_url}-1}" == "/" ] && [ ${#path_url} -gt 1 ]; then    # If the last character is a / and that not the only character.
+		path_url="${path_url:0:${#path_url}-1}"	# Delete the last character
+	fi
+	echo $path_url
+}