diff --git a/src/Error/ErrorMessages.php b/src/Error/ErrorMessages.php
new file mode 100644
index 00000000..27f5b71d
--- /dev/null
+++ b/src/Error/ErrorMessages.php
@@ -0,0 +1,50 @@
+<?php
+namespace Contentstack\Error;
+
+/**
+ * Class ErrorMessages
+ * Contains all error messages used across the SDK
+ * 
+ * @category PHP
+ * @package  Contentstack
+ * @author   Contentstack <support@contentstack.com>
+ * @license  https://github.com/contentstack/contentstack-php/blob/master/LICENSE.txt MIT Licence
+ * @link     https://www.contentstack.com/docs/platforms/php/
+ */
+class ErrorMessages
+{
+    // BaseQuery.php error messages
+    const FIELD_UIDS_ARRAY = 'Field UIDs must be an array. Convert the value to an array and try again.';
+    const TAGS_ARRAY = 'Tags must be an array. Convert the value to an array and try again.';
+    const VALUE_ARRAY = 'Value must be an array. Convert the value to an array and try again.';
+    const INVALID_QUERY = 'Invalid query. Update the query and try again.';
+
+    // helper.php error messages
+    const INVALID_STRING_INPUT = 'Invalid input for "%s". Use a string value and try again.';
+    const INVALID_INCLUDE_REFERENCES = 'Invalid input for includeReferences. Use an array and try again.';
+    const INVALID_INPUT_TYPE = 'Invalid input. Use a string or an array and try again.';
+    const INVALID_REGEX_KEY_VALUE = 'Invalid input for regex. Use a string for the key and a valid regular expression for the value.';
+    const INVALID_REGEX_OPTIONS = 'Invalid regex options. Provide valid options and try again.';
+    const INVALID_REGEX_ARGS = 'Invalid input for regex. Provide 2 or 3 arguments and try again.';
+    const INVALID_TAGS_INPUT = 'Invalid input for tags. Use a valid array of tags and try again.';
+    const INVALID_KEY_VALUE = 'Invalid input for "%s". Use a string for the key and a valid value, then try again.';
+    const INVALID_QUERY_INPUT = 'Invalid input for "%s". Provide at least one query and try again.';
+    const INVALID_QUERY_OBJECTS = 'Invalid input. Query objects are expected as arguments. Update the input and try again.';
+    const INVALID_KEY_ARRAY_VALUE = 'Invalid input for "%s". Use a string for the key and an array for the value, then try again.';
+    const INVALID_NUMERIC_INPUT = 'Invalid input for "%s". Use a numeric value and try again.';
+    const INVALID_FIELD_INPUT = 'Invalid input for "%s". Use a valid field from the entry and try again.';
+    const INVALID_FIELD_UID = 'Invalid input for "%s". Use a valid string field UID and try again.';
+
+    /**
+     * Format error message with function name
+     *
+     * @param string $message The message template containing %s placeholder
+     * @param string $functionName The function name to insert
+     * 
+     * @return string Formatted error message
+     */
+    public static function formatMessage($message, $functionName = '')
+    {
+        return sprintf($message, $functionName);
+    }
+}
diff --git a/src/Stack/BaseQuery.php b/src/Stack/BaseQuery.php
index b63d5b66..039eeaa0 100755
--- a/src/Stack/BaseQuery.php
+++ b/src/Stack/BaseQuery.php
@@ -16,6 +16,7 @@
 
 namespace Contentstack\Stack;
 use Contentstack\Support\Utility;
+use Contentstack\Error\ErrorMessages;
 
 require_once __DIR__ . "/../Support/helper.php";
 
@@ -110,7 +111,7 @@ public function except($level = 'BASE', $field_uids = array())
             );
             return $this->queryObject;
         }
-        throw contentstackCreateError('field_uids must be an array');
+        throw contentstackCreateError(ErrorMessages::FIELD_UIDS_ARRAY);
     }
 
     /**
@@ -142,7 +143,7 @@ public function only($level = 'BASE', $field_uids = array())
             );
             return $this->queryObject;
         }
-        throw contentstackCreateError('field_uids must be an array');
+        throw contentstackCreateError(ErrorMessages::FIELD_UIDS_ARRAY);
     }
 
     /**
@@ -175,7 +176,7 @@ public function includeReference($field_uids = array())
             );
             return $this->queryObject;
         }
-        throw contentstackCreateError('field_uids must be an array');
+        throw contentstackCreateError(ErrorMessages::FIELD_UIDS_ARRAY);
     }
 
     /**
@@ -710,7 +711,7 @@ public function tags($tags = array())
             );
             return $this->queryObject;
         }
-        throw contentstackCreateError('tags must be an array');
+        throw contentstackCreateError(ErrorMessages::TAGS_ARRAY);
     }
 
     /**
@@ -773,7 +774,7 @@ public function containedIn($field = '', $value = array())
             );
             return $this->queryObject;
         }
-        throw contentstackCreateError('value must be an array');
+        throw contentstackCreateError(ErrorMessages::VALUE_ARRAY);
     }
 
     /**
@@ -809,7 +810,7 @@ public function notContainedIn($field = '', $value = array())
             );
             return $this->queryObject;
         }
-        throw contentstackCreateError('value must be an array');
+        throw contentstackCreateError(ErrorMessages::VALUE_ARRAY);
     }
 
     /**
@@ -990,7 +991,7 @@ public function addQuery($_query = array())
             $this->subQuery = $_query;
             return $this->queryObject;
         }
-        throw contentstackCreateError("Provide valid query");
+        throw contentstackCreateError(ErrorMessages::INVALID_QUERY);
     }
 
     /**
diff --git a/src/Support/helper.php b/src/Support/helper.php
index 04a08384..6b32e121 100755
--- a/src/Support/helper.php
+++ b/src/Support/helper.php
@@ -1,6 +1,7 @@
 <?php
 
 use Contentstack\Support\Utility;
+use Contentstack\Error\ErrorMessages;
 
 if(!function_exists('contentstackGetFunctionName')) {
     /*
@@ -40,7 +41,7 @@ function contentstackCreateError($msg = '') {
      * */
     function contentstackSearch($operator = '', $query = array(), $value = '') {
         if(!(!Utility::isEmpty($value) && is_string($value)))
-            throw contentstackCreateError('Invalid input for "'.contentstackGetFunctionName().'". String value expected.');
+            throw contentstackCreateError(ErrorMessages::formatMessage(ErrorMessages::INVALID_STRING_INPUT, contentstackGetFunctionName()));
         $query[$operator] = $value;
         return $query;
     }
@@ -57,7 +58,7 @@ function contentstackSearch($operator = '', $query = array(), $value = '') {
      * */
     function contentstackReferences($operator = '', $query = array(), $value = array()) {
         if(!is_array($value))
-            throw contentstackCreateError('Invalid input for includeReferences. Array expected.');
+            throw contentstackCreateError(ErrorMessages::INVALID_INCLUDE_REFERENCES);
         $query[$operator] = $value;
         return $query;
     }
@@ -77,7 +78,7 @@ function contentstackProjection($operator = '', $query = array(), $level = 'BASE
             $value = $level;
             $level = 'BASE';
         }
-        if(!(!Utility::isEmpty($level) && is_string($level) && is_array($value))) throw contentstackCreateError('Invalid Input');
+        if(!(!Utility::isEmpty($level) && is_string($level) && is_array($value))) throw contentstackCreateError(ErrorMessages::INVALID_INPUT_TYPE);
         if(!Utility::isKeySet($query, $operator)) $query[$operator] = array();
         if(!Utility::isKeySet($query[$operator], $level)) $query[$operator][$level] = array();
         $query[$operator][$level] = array_merge($query[$operator][$level], $value);
@@ -100,16 +101,16 @@ function contentstackProjection($operator = '', $query = array(), $level = 'BASE
     function contentstackRegexp($operator = '', $query = array(), $values = array()) {
         if(count($values) === 2 || count($values) === 3) {
             if(Utility::isEmpty($values[0]) && Utility::isEmpty($values[1]) && is_string($values[0]) && is_string($values[1]))
-                throw contentstackCreateError('Invalid input for regex.Key must be string and value must be valid RegularExpression');
+                throw contentstackCreateError(ErrorMessages::INVALID_REGEX_KEY_VALUE);
             if(isset($values[2]) && !(is_string($values[2]) && strlen($values[2]) > 0)) {
-                throw contentstackCreateError('Invalid options for regex. Please provide the valid options');
+                throw contentstackCreateError(ErrorMessages::INVALID_REGEX_OPTIONS);
             }
             $query[$values[0]] = array($operator => $values[1]);
             if(isset($values[2]))
                 $query[$values[0]]['$options'] = $values[2];
             return $query;
         } else {
-            throw contentstackCreateError('Invalid input for regex. At least 2 or maximum 3 arguments are required.');
+            throw contentstackCreateError(ErrorMessages::INVALID_REGEX_ARGS);
         }
     }
 }
@@ -126,7 +127,7 @@ function contentstackRegexp($operator = '', $query = array(), $values = array())
      * */
     function contentstackTags($operator = '', $query = array(), $value = '') {
         if(!(is_array($value) && count($value) > 0))
-            throw contentstackCreateError('Invalid input for tags.Value must be valid array of tags');
+            throw contentstackCreateError(ErrorMessages::INVALID_TAGS_INPUT);
         $query[$operator] = $value;
         return $query;
     }
@@ -146,7 +147,7 @@ function contentstackTags($operator = '', $query = array(), $value = '') {
      * */
     function contentstackComparision($operator = '', $query = array(), $key = '', $value = '') {
         if(!(!Utility::isEmpty($key) && is_string($key) && !Utility::isEmpty($value)))
-            throw contentstackCreateError('Invalid input for "'.contentstackGetFunctionName().'". Key must be string and value should be valid not empty.');
+            throw contentstackCreateError(ErrorMessages::formatMessage(ErrorMessages::INVALID_KEY_VALUE, contentstackGetFunctionName()));
         $query[$key] = array($operator => $value);
         return $query;
     }
@@ -165,7 +166,7 @@ function contentstackComparision($operator = '', $query = array(), $key = '', $v
      * */
     function contentstackLogical($operator = '', $query = array(), $value = array()) {
         if(!(is_array($value) && count($value) > 0))
-            throw contentstackCreateError('Invalid input for "'.contentstackGetFunctionName().'". At least one Query or array object is expected');
+            throw contentstackCreateError(ErrorMessages::formatMessage(ErrorMessages::INVALID_QUERY_INPUT, contentstackGetFunctionName()));
         foreach($value as $key => $_qry) {
             if(!Utility::isKeySet($query, $operator)) $query[$operator] = array();
             if($_qry instanceof \Contentstack\Stack\BaseQuery)
@@ -174,7 +175,7 @@ function contentstackLogical($operator = '', $query = array(), $value = array())
                 array_push($query[$operator], $_qry);
             else {
                 unset($query[$operator]);
-                throw contentstackCreateError('Query objects are expected as arguments');
+                throw contentstackCreateError(ErrorMessages::INVALID_QUERY_OBJECTS);
             }
         }
         return $query;
@@ -194,7 +195,7 @@ function contentstackLogical($operator = '', $query = array(), $value = array())
      * */
     function contentstackContains($operator = '', $query = array(), $key = '', $value = array()) {
         if (!(!Utility::isEmpty($key) && is_string($key) && is_array($value)))
-            throw contentstackCreateError('Invalid input for "'.contentstackGetFunctionName().'". Key should be string and value must be array.');
+            throw contentstackCreateError(ErrorMessages::formatMessage(ErrorMessages::INVALID_KEY_ARRAY_VALUE, contentstackGetFunctionName()));
         $query[$key] = array($operator => $value);
         return $query;
     }
@@ -212,7 +213,7 @@ function contentstackContains($operator = '', $query = array(), $key = '', $valu
      * */
     function contentstackPagination($operator = '', $query = array(), $value = '') {
         if (!(!Utility::isEmpty($value) && is_numeric($value)))
-            throw contentstackCreateError('Invalid input for "'.contentstackGetFunctionName().'", it should be Numeric.');
+            throw contentstackCreateError(ErrorMessages::formatMessage(ErrorMessages::INVALID_NUMERIC_INPUT, contentstackGetFunctionName()));
         $query[$operator] = $value;
         return $query;
     }
@@ -231,7 +232,7 @@ function contentstackPagination($operator = '', $query = array(), $value = '') {
     function contentstackLanguage($operator = '', $query = array(), $value = '') {
        
         if (!(!Utility::isEmpty($value) && is_string($value)))
-            throw contentstackCreateError('Invalid input for "'.contentstackGetFunctionName().'", it should be String.');
+            throw contentstackCreateError(ErrorMessages::formatMessage(ErrorMessages::INVALID_STRING_INPUT, contentstackGetFunctionName()));
             $query[$operator] = $value; 
         return $query;
     }
@@ -249,7 +250,7 @@ function contentstackLanguage($operator = '', $query = array(), $value = '') {
      * */
     function contentstackSorting($operator = '', $query = array(), $key = '') {
         if (!(!Utility::isEmpty($key) && is_string($key)))
-            throw contentstackCreateError('Invalid input for "'.contentstackGetFunctionName().'". Value should be valid field in entry');
+            throw contentstackCreateError(ErrorMessages::formatMessage(ErrorMessages::INVALID_FIELD_INPUT, contentstackGetFunctionName()));
         $query[$operator] = $key;
         return $query;
     }
@@ -300,7 +301,7 @@ function contentstackAddParam($key = '', $query = array(), $value = '') {
      * */
     function contentstackExistence($operator = '', $query = array(), $key = '', $value = false) {
         if (!(!Utility::isEmpty($key) && is_string($key)))
-            throw contentstackCreateError('Invalid input for "'.contentstackGetFunctionName().'". Key should be valid String field uid');
+            throw contentstackCreateError(ErrorMessages::formatMessage(ErrorMessages::INVALID_FIELD_UID, contentstackGetFunctionName()));
         $query[$key] = array($operator => $value);
         return $query;
     }