diff --git a/test/arrays.bats b/test/arrays.bats
index cfee54f..bdbf7e1 100755
--- a/test/arrays.bats
+++ b/test/arrays.bats
@@ -91,7 +91,12 @@ teardown() {
 }
 
 @test "_inArray_: success" {
-  run _inArray_ one "${A[@]}"
+  run _inArray_ "one" "${A[@]}"
+  assert_success
+}
+
+@test "_inArray_: success and ignore case" {
+  run _inArray_ -i "ONE" "${A[@]}"
   assert_success
 }
 
diff --git a/test/strings.bats b/test/strings.bats
index 3ab7219..546b1d5 100755
--- a/test/strings.bats
+++ b/test/strings.bats
@@ -57,6 +57,7 @@ setup() {
   set -o errtrace
   set -o nounset
   set -o pipefail
+  shopt -u nocasematch
 }
 
 teardown() {
@@ -90,20 +91,30 @@ teardown() {
 }
 
 @test "_stringContains_: failure" {
-  run _stringContains_ "hello world!" "zebra"
+  run _stringContains_ "hello world!" "LO"
   assert_failure
 }
 
+@test "_stringContains_: success, case insensitive" {
+  run _stringContains_ -i "hello world!" "LO"
+  assert_success
+}
+
 @test "_stringRegex_: success" {
-  run _stringRegex_ "hello world!" "[a-z].*!$"
+  run _stringRegex_ "hello world!" "^h[a-z ]+!$"
   assert_success
 }
 
 @test "_stringRegex_: failure" {
-  run _stringRegex_ "hello world!" "^.*[0-9]+"
+  run _stringRegex_ "Hello World!" "^h[a-z ]+!$"
   assert_failure
 }
 
+@test "_stringRegex_: success, case insensitive" {
+  run _stringRegex_ -i "Hello World!" "^h[a-z ]+!$"
+  assert_success
+}
+
 
 _testCleanString_() {
 
@@ -280,8 +291,21 @@ _testStopWords_
   assert_output "#FFFFFF"
 }
 
-@test "_regexCapture_: failure" {
+@test "_regexCapture_: success, case insensitive" {
+  run _regexCapture_ -i "#FFFFFF" '^(#?([a-f0-9]{6}|[a-f0-9]{3}))$' || echo "no match found"
+
+  assert_success
+  assert_output "#FFFFFF"
+}
+
+@test "_regexCapture_: failure, no match found" {
   run _regexCapture_ "gggggg" '^(#?([a-fA-F0-9]{6}|[a-fA-F0-9]{3}))$'
 
   assert_failure
 }
+
+@test "_regexCapture_: failure, would only match with case insensitive" {
+  run _regexCapture_ "#FFFFFF" '^(#?([a-f0-9]{6}|[a-f0-9]{3}))$' || echo "no match found"
+
+  assert_failure
+}
diff --git a/utilities/arrays.bash b/utilities/arrays.bash
index 53ea523..d7e7f74 100644
--- a/utilities/arrays.bash
+++ b/utilities/arrays.bash
@@ -98,7 +98,7 @@ _forEachValidate_() {
 
 _forEachFind_() {
     # DESC:
-    #					Iterates over elements, returning the first value that is validated by a function
+    #					Iterates over elements, returning success and printing the first value that is validated by a function
     # ARGS:
     #					$1 (Required) - Function name to pass each item to for validation. (Must return 0 on success)
     # OUTS:
@@ -236,6 +236,8 @@ _inArray_() {
     # ARGS:
     #         $1 (Required) - Value to search for
     #         $2 (Required) - Array written as ${ARRAY[@]}
+    # OPTIONS:
+    #         -i (Optional) - Ignore case
     # OUTS:
     #         0 if true
     #         1 if untrue
@@ -248,11 +250,14 @@ _inArray_() {
     [[ $# -lt 2 ]] && fatal "Missing required argument to ${FUNCNAME[0]}"
 
     local opt
-    local _case_insensitive=false
     local OPTIND=1
     while getopts ":iI" opt; do
         case ${opt} in
-            i | I) _case_insensitive=true ;;
+            i | I)
+                #shellcheck disable=SC2064
+                trap "$(shopt -p nocasematch)" RETURN # reset nocasematch when function exits
+                shopt -s nocasematch                  # Use case-insensitive regex
+                ;;
             *) fatal "Unrecognized option '${1}' passed to ${FUNCNAME[0]}. Exiting." ;;
         esac
     done
@@ -262,11 +267,7 @@ _inArray_() {
     local _value="${1}"
     shift
     for _array_item in "$@"; do
-        if [ ${_case_insensitive} = true ]; then
-            _value="$(echo "${_value}" | tr '[:upper:]' '[:lower:]')"
-            _array_item="$(echo "${_array_item}" | tr '[:upper:]' '[:lower:]')"
-        fi
-        [[ ${_array_item} == "${_value}" ]] && return 0
+        [[ ${_array_item} =~ ^${_value}$ ]] && return 0
     done
     return 1
 }
diff --git a/utilities/checks.bash b/utilities/checks.bash
index 62fbe55..05d0afe 100644
--- a/utilities/checks.bash
+++ b/utilities/checks.bash
@@ -115,6 +115,11 @@ _isEmail_() {
     #					_isEmail_ "somename+test@gmail.com"
 
     [[ $# == 0 ]] && fatal "Missing required argument to ${FUNCNAME[0]}"
+
+    #shellcheck disable=SC2064
+    trap "$(shopt -p nocasematch)" RETURN # reset nocasematch when function exits
+    shopt -s nocasematch                  # Use case-insensitive regex
+
     local _emailRegex
     _emailRegex="^[a-z0-9!#\$%&'*+/=?^_\`{|}~-]+(\.[a-z0-9!#$%&'*+/=?^_\`{|}~-]+)*@([a-z0-9]([a-z0-9-]*[a-z0-9])?\.)+[a-z0-9]([a-z0-9-]*[a-z0-9])?\$"
     [[ ${1} =~ ${_emailRegex} ]] && return 0 || return 1
diff --git a/utilities/dates.bash b/utilities/dates.bash
index 23a442f..94c4a5c 100644
--- a/utilities/dates.bash
+++ b/utilities/dates.bash
@@ -228,7 +228,9 @@ _parseDate_() {
     PARSE_DATE_FOUND="" PARSE_DATE_YEAR="" PARSE_DATE_MONTH="" PARSE_DATE_MONTH_NAME=""
     PARSE_DATE_DAY="" PARSE_DATE_HOUR="" PARSE_DATE_MINUTE=""
 
-    shopt -s nocasematch #Use case-insensitive regex
+    #shellcheck disable=SC2064
+    trap "$(shopt -p nocasematch)" RETURN # reset nocasematch when function exits
+    shopt -s nocasematch                  # Use case-insensitive regex
 
     debug "_parseDate_() input ${tan}$date${purple}"
 
diff --git a/utilities/strings.bash b/utilities/strings.bash
index 3570862..ec986fd 100644
--- a/utilities/strings.bash
+++ b/utilities/strings.bash
@@ -236,6 +236,8 @@ _regexCapture_() {
     # ARGS:
     #         $1 (Required) - Input String
     #         $2 (Required) - Regex pattern
+    # OPTIONS:
+    #         -i (Optional) - Ignore case
     # OUTS:
     #         0 - Regex matched
     #         1 - Regex did not match
@@ -248,6 +250,20 @@ _regexCapture_() {
     # CREDIT:
     #         https://github.com/dylanaraps/pure-bash-bible
 
+    local opt
+    local OPTIND=1
+    while getopts ":iI" opt; do
+        case ${opt} in
+            i | I)
+                #shellcheck disable=SC2064
+                trap "$(shopt -p nocasematch)" RETURN # reset nocasematch when function exits
+                shopt -s nocasematch                  # Use case-insensitive regex
+                ;;
+            *) fatal "Unrecognized option '${1}' passed to ${FUNCNAME[0]}. Exiting." ;;
+        esac
+    done
+    shift $((OPTIND - 1))
+
     [[ $# -lt 2 ]] && fatal "Missing required argument to ${FUNCNAME[0]}"
 
     if [[ $1 =~ $2 ]]; then
@@ -300,12 +316,28 @@ _stringContains_() {
     # ARGS:
     #					$1 (Required) - String to be tested
     #         $2 (Required) - Substring to be tested for
+    # OPTIONS:
+    #          -i (Optional) - Ignore case
     # OUTS:
     #					0 - Search pattern found
     #					1 - Pattern not found
     # USAGE:
     #					_stringContains_ "Hello World!" "lo"
 
+    local opt
+    local OPTIND=1
+    while getopts ":iI" opt; do
+        case ${opt} in
+            i | I)
+                #shellcheck disable=SC2064
+                trap "$(shopt -p nocasematch)" RETURN # reset nocasematch when function exits
+                shopt -s nocasematch                  # Use case-insensitive searching
+                ;;
+            *) fatal "Unrecognized option '${1}' passed to ${FUNCNAME[0]}. Exiting." ;;
+        esac
+    done
+    shift $((OPTIND - 1))
+
     [[ $# -lt 2 ]] && fatal "Missing required argument to ${FUNCNAME[0]}"
 
     if [[ ${1} == *${2}* ]]; then
@@ -321,11 +353,28 @@ _stringRegex_() {
     # ARGS:
     #					$1 (Required) - String to be tested
     #         $2 (Required) - Regex pattern to be tested for
+    # OPTIONS:
+    #          -i (Optional) - Ignore case
     # OUTS:
     #					0 - Search pattern found
     #					1 - Pattern not found
     # USAGE:
     #					_stringContains_ "HELLO" "^[A-Z]*$"
+    #         _stringContains_ -i "HELLO" "^[a-z]*$"
+
+    local opt
+    local OPTIND=1
+    while getopts ":iI" opt; do
+        case ${opt} in
+            i | I)
+                #shellcheck disable=SC2064
+                trap "$(shopt -p nocasematch)" RETURN # reset nocasematch when function exits
+                shopt -s nocasematch                  # Use case-insensitive regex
+                ;;
+            *) fatal "Unrecognized option '${1}' passed to ${FUNCNAME[0]}. Exiting." ;;
+        esac
+    done
+    shift $((OPTIND - 1))
 
     [[ $# -lt 2 ]] && fatal "Missing required argument to ${FUNCNAME[0]}"