diff --git a/src/PhpSpreadsheet/Calculation/TextData/Extract.php b/src/PhpSpreadsheet/Calculation/TextData/Extract.php
index 1a9e84db..ee7e31b7 100644
--- a/src/PhpSpreadsheet/Calculation/TextData/Extract.php
+++ b/src/PhpSpreadsheet/Calculation/TextData/Extract.php
@@ -104,7 +104,8 @@ class Extract
      *
      * @param mixed $text the text that you're searching
      *                    Or can be an array of values
-     * @param ?string $delimiter the text that marks the point before which you want to extract
+     * @param null|array|string $delimiter the text that marks the point before which you want to extract
+     *                                 Multiple delimiters can be passed as an array of string values
      * @param mixed $instance The instance of the delimiter after which you want to extract the text.
      *                            By default, this is the first instance (1).
      *                            A negative value means start searching from the end of the text string.
@@ -132,7 +133,6 @@ class Extract
         }
 
         $text = Helpers::extractString($text ?? '');
-        $delimiter = Helpers::extractString(Functions::flattenSingleValue($delimiter ?? ''));
         $instance = (int) $instance;
         $matchMode = (int) $matchMode;
         $matchEnd = (int) $matchEnd;
@@ -141,13 +141,14 @@ class Extract
         if (is_array($split) === false) {
             return $split;
         }
-        if ($delimiter === '') {
+        if (Helpers::extractString(Functions::flattenSingleValue($delimiter ?? '')) === '') {
             return ($instance > 0) ? '' : $text;
         }
 
         // Adjustment for a match as the first element of the split
         $flags = self::matchFlags($matchMode);
-        $adjust = preg_match('/^' . preg_quote($delimiter) . "\$/{$flags}", $split[0]);
+        $delimiter = self::buildDelimiter($delimiter);
+        $adjust = preg_match('/^' . $delimiter . "\$/{$flags}", $split[0]);
         $oddReverseAdjustment = count($split) % 2;
 
         $split = ($instance < 0)
@@ -161,7 +162,8 @@ class Extract
      * TEXTAFTER.
      *
      * @param mixed $text the text that you're searching
-     * @param ?string $delimiter the text that marks the point before which you want to extract
+     * @param null|array|string $delimiter the text that marks the point before which you want to extract
+     *                                 Multiple delimiters can be passed as an array of string values
      * @param mixed $instance The instance of the delimiter after which you want to extract the text.
      *                          By default, this is the first instance (1).
      *                          A negative value means start searching from the end of the text string.
@@ -189,7 +191,6 @@ class Extract
         }
 
         $text = Helpers::extractString($text ?? '');
-        $delimiter = Helpers::extractString(Functions::flattenSingleValue($delimiter ?? ''));
         $instance = (int) $instance;
         $matchMode = (int) $matchMode;
         $matchEnd = (int) $matchEnd;
@@ -198,13 +199,14 @@ class Extract
         if (is_array($split) === false) {
             return $split;
         }
-        if ($delimiter === '') {
+        if (Helpers::extractString(Functions::flattenSingleValue($delimiter ?? '')) === '') {
             return ($instance < 0) ? '' : $text;
         }
 
         // Adjustment for a match as the first element of the split
         $flags = self::matchFlags($matchMode);
-        $adjust = preg_match('/^' . preg_quote($delimiter) . "\$/{$flags}", $split[0]);
+        $delimiter = self::buildDelimiter($delimiter);
+        $adjust = preg_match('/^' . $delimiter . "\$/{$flags}", $split[0]);
         $oddReverseAdjustment = count($split) % 2;
 
         $split = ($instance < 0)
@@ -215,21 +217,23 @@ class Extract
     }
 
     /**
+     * @param null|array|string $delimiter
      * @param int $matchMode
      * @param int $matchEnd
      * @param mixed $ifNotFound
      *
      * @return string|string[]
      */
-    private static function validateTextBeforeAfter(string $text, string $delimiter, int $instance, $matchMode, $matchEnd, $ifNotFound)
+    private static function validateTextBeforeAfter(string $text, $delimiter, int $instance, $matchMode, $matchEnd, $ifNotFound)
     {
         $flags = self::matchFlags($matchMode);
+        $delimiter = self::buildDelimiter($delimiter);
 
-        if (preg_match('/' . preg_quote($delimiter) . "/{$flags}", $text) === 0 && $matchEnd === 0) {
+        if (preg_match('/' . $delimiter . "/{$flags}", $text) === 0 && $matchEnd === 0) {
             return $ifNotFound;
         }
 
-        $split = preg_split('/(' . preg_quote($delimiter) . ")/{$flags}", $text, 0, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
+        $split = preg_split('/' . $delimiter . "/{$flags}", $text, 0, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
         if ($split === false) {
             return ExcelError::NA();
         }
@@ -247,6 +251,28 @@ class Extract
         return $split;
     }
 
+    /**
+     * @param null|array|string $delimiter the text that marks the point before which you want to extract
+     *                                 Multiple delimiters can be passed as an array of string values
+     */
+    private static function buildDelimiter($delimiter): string
+    {
+        if (is_array($delimiter)) {
+            $delimiter = Functions::flattenArray($delimiter);
+            $quotedDelimiters = array_map(
+                function ($delimiter) {
+                    return preg_quote($delimiter ?? '');
+                },
+                $delimiter
+            );
+            $delimiters = implode('|', $quotedDelimiters);
+
+            return '(' . $delimiters . ')';
+        }
+
+        return '(' . preg_quote($delimiter ?? '') . ')';
+    }
+
     private static function matchFlags(int $matchMode): string
     {
         return ($matchMode === 0) ? 'mu' : 'miu';
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TextAfterTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TextAfterTest.php
index b3b01d24..00483260 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TextAfterTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TextAfterTest.php
@@ -2,8 +2,6 @@
 
 namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\TextData;
 
-use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
-
 class TextAfterTest extends AllSetupTeardown
 {
     /**
@@ -14,14 +12,17 @@ class TextAfterTest extends AllSetupTeardown
         $text = $arguments[0];
         $delimiter = $arguments[1];
 
-        $args = 'A1, A2';
+        $args = (is_array($delimiter)) ? 'A1, {A2,A3}' : 'A1, A2';
         $args .= (isset($arguments[2])) ? ", {$arguments[2]}" : ',';
         $args .= (isset($arguments[3])) ? ", {$arguments[3]}" : ',';
         $args .= (isset($arguments[4])) ? ", {$arguments[4]}" : ',';
 
         $worksheet = $this->getSheet();
         $worksheet->getCell('A1')->setValue($text);
-        $worksheet->getCell('A2')->setValue($delimiter);
+        $worksheet->getCell('A2')->setValue((is_array($delimiter)) ? $delimiter[0] : $delimiter);
+        if (is_array($delimiter)) {
+            $worksheet->getCell('A3')->setValue($delimiter[1]);
+        }
         $worksheet->getCell('B1')->setValue("=TEXTAFTER({$args})");
 
         $result = $worksheet->getCell('B1')->getCalculatedValue();
@@ -32,18 +33,4 @@ class TextAfterTest extends AllSetupTeardown
     {
         return require 'tests/data/Calculation/TextData/TEXTAFTER.php';
     }
-
-    public function testTextAfterWithArray(): void
-    {
-        $calculation = Calculation::getInstance();
-
-        $text = "Red Riding Hood's red riding hood";
-        $delimiter = 'red';
-
-        $args = "\"{$text}\", \"{$delimiter}\", 1, {0;1}";
-
-        $formula = "=TEXTAFTER({$args})";
-        $result = $calculation->_calculateFormulaValue($formula);
-        self::assertEquals([[' riding hood'], [" Riding Hood's red riding hood"]], $result);
-    }
 }
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TextBeforeTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TextBeforeTest.php
index 17938b5e..37e46636 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TextBeforeTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/TextData/TextBeforeTest.php
@@ -12,14 +12,17 @@ class TextBeforeTest extends AllSetupTeardown
         $text = $arguments[0];
         $delimiter = $arguments[1];
 
-        $args = 'A1, A2';
+        $args = (is_array($delimiter)) ? 'A1, {A2,A3}' : 'A1, A2';
         $args .= (isset($arguments[2])) ? ", {$arguments[2]}" : ',';
         $args .= (isset($arguments[3])) ? ", {$arguments[3]}" : ',';
         $args .= (isset($arguments[4])) ? ", {$arguments[4]}" : ',';
 
         $worksheet = $this->getSheet();
         $worksheet->getCell('A1')->setValue($text);
-        $worksheet->getCell('A2')->setValue($delimiter);
+        $worksheet->getCell('A2')->setValue((is_array($delimiter)) ? $delimiter[0] : $delimiter);
+        if (is_array($delimiter)) {
+            $worksheet->getCell('A3')->setValue($delimiter[1]);
+        }
         $worksheet->getCell('B1')->setValue("=TEXTBEFORE({$args})");
 
         $result = $worksheet->getCell('B1')->getCalculatedValue();
diff --git a/tests/data/Calculation/TextData/TEXTAFTER.php b/tests/data/Calculation/TextData/TEXTAFTER.php
index c594ecdc..ebcfecb9 100644
--- a/tests/data/Calculation/TextData/TEXTAFTER.php
+++ b/tests/data/Calculation/TextData/TEXTAFTER.php
@@ -212,4 +212,40 @@ return [
             1,
         ],
     ],
+    'Multi-delimiter Case-Insensitive Offset 1' => [
+        " riding hood's red riding hood",
+        [
+            "Little Red riding hood's red riding hood",
+            ['HOOD', 'RED'],
+            1,
+            1,
+        ],
+    ],
+    'Multi-delimiter Case-Insensitive Offset 2' => [
+        "'s red riding hood",
+        [
+            "Little Red riding hood's red riding hood",
+            ['HOOD', 'RED'],
+            2,
+            1,
+        ],
+    ],
+    'Multi-delimiter Case-Insensitive Offset 3' => [
+        ' riding hood',
+        [
+            "Little Red riding hood's red riding hood",
+            ['HOOD', 'RED'],
+            3,
+            1,
+        ],
+    ],
+    'Multi-delimiter Case-Insensitive Offset -2' => [
+        ' riding hood',
+        [
+            "Little Red riding hood's red riding hood",
+            ['HOOD', 'RED'],
+            -2,
+            1,
+        ],
+    ],
 ];
diff --git a/tests/data/Calculation/TextData/TEXTBEFORE.php b/tests/data/Calculation/TextData/TEXTBEFORE.php
index f94d5f28..1929354c 100644
--- a/tests/data/Calculation/TextData/TEXTBEFORE.php
+++ b/tests/data/Calculation/TextData/TEXTBEFORE.php
@@ -204,4 +204,40 @@ return [
             1,
         ],
     ],
+    'Multi-delimiter Case-Insensitive Offset 1' => [
+        'Little ',
+        [
+            "Little Red riding hood's red riding hood",
+            ['HOOD', 'RED'],
+            1,
+            1,
+        ],
+    ],
+    'Multi-delimiter Case-Insensitive Offset 2' => [
+        'Little Red riding ',
+        [
+            "Little Red riding hood's red riding hood",
+            ['HOOD', 'RED'],
+            2,
+            1,
+        ],
+    ],
+    'Multi-delimiter Case-Insensitive Offset 3' => [
+        "Little Red riding hood's ",
+        [
+            "Little Red riding hood's red riding hood",
+            ['HOOD', 'RED'],
+            3,
+            1,
+        ],
+    ],
+    'Multi-delimiter Case-Insensitive Offset -2' => [
+        "Little Red riding hood's ",
+        [
+            "Little Red riding hood's red riding hood",
+            ['HOOD', 'RED'],
+            -2,
+            1,
+        ],
+    ],
 ];