diff --git a/composer.json b/composer.json
index 748addb..001453c 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,8 @@
         "source": "https://github.com/Vectorface/MySQLite"
     },
     "require": {
-        "php": "^8.0.0"
+        "php": "^8.0.0",
+        "ext-pdo": "*"
     },
     "require-dev": {
         "phpunit/phpunit": "^9",
diff --git a/src/Vectorface/MySQLite/MySQL/StringFunctions.php b/src/Vectorface/MySQLite/MySQL/StringFunctions.php
index 0050adc..a945096 100644
--- a/src/Vectorface/MySQLite/MySQL/StringFunctions.php
+++ b/src/Vectorface/MySQLite/MySQL/StringFunctions.php
@@ -50,4 +50,12 @@ public static function mysql_format()
         $decimals = isset($args[1]) ? $args[1] : 0;
         return number_format($number, $decimals);
     }
+
+    /**
+     * Get the soundex value of a given string
+     */
+    public static function mysql_soundex(string $str): string
+    {
+        return soundex($str);
+    }
 }
diff --git a/tests/Vectorface/Tests/MySQLite/MySQLiteTest.php b/tests/Vectorface/Tests/MySQLite/MySQLiteTest.php
index 08d6437..6dd9175 100644
--- a/tests/Vectorface/Tests/MySQLite/MySQLiteTest.php
+++ b/tests/Vectorface/Tests/MySQLite/MySQLiteTest.php
@@ -169,4 +169,9 @@ public function testFormat()
         $test = MySQLite::mysql_format("12.232", 1);
         $this->assertEquals($expected, $test);
     }
+
+    public function testSoundex()
+    {
+        $this->assertEquals("F000", MySQLite::mysql_soundex("foo"));
+    }
 }