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diff --git a/srcs/wordpress/wp-includes/class-wp-error.php b/srcs/wordpress/wp-includes/class-wp-error.php
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+++ b/srcs/wordpress/wp-includes/class-wp-error.php
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+<?php
+/**
+ * WordPress Error API.
+ *
+ * Contains the WP_Error class and the is_wp_error() function.
+ *
+ * @package WordPress
+ */
+
+/**
+ * WordPress Error class.
+ *
+ * Container for checking for WordPress errors and error messages. Return
+ * WP_Error and use is_wp_error() to check if this class is returned. Many
+ * core WordPress functions pass this class in the event of an error and
+ * if not handled properly will result in code errors.
+ *
+ * @since 2.1.0
+ */
+class WP_Error {
+	/**
+	 * Stores the list of errors.
+	 *
+	 * @since 2.1.0
+	 * @var array
+	 */
+	public $errors = array();
+
+	/**
+	 * Stores the list of data for error codes.
+	 *
+	 * @since 2.1.0
+	 * @var array
+	 */
+	public $error_data = array();
+
+	/**
+	 * Initialize the error.
+	 *
+	 * If `$code` is empty, the other parameters will be ignored.
+	 * When `$code` is not empty, `$message` will be used even if
+	 * it is empty. The `$data` parameter will be used only if it
+	 * is not empty.
+	 *
+	 * Though the class is constructed with a single error code and
+	 * message, multiple codes can be added using the `add()` method.
+	 *
+	 * @since 2.1.0
+	 *
+	 * @param string|int $code Error code
+	 * @param string $message Error message
+	 * @param mixed $data Optional. Error data.
+	 */
+	public function __construct( $code = '', $message = '', $data = '' ) {
+		if ( empty( $code ) ) {
+			return;
+		}
+
+		$this->errors[ $code ][] = $message;
+
+		if ( ! empty( $data ) ) {
+			$this->error_data[ $code ] = $data;
+		}
+	}
+
+	/**
+	 * Retrieve all error codes.
+	 *
+	 * @since 2.1.0
+	 *
+	 * @return array List of error codes, if available.
+	 */
+	public function get_error_codes() {
+		if ( ! $this->has_errors() ) {
+			return array();
+		}
+
+		return array_keys( $this->errors );
+	}
+
+	/**
+	 * Retrieve first error code available.
+	 *
+	 * @since 2.1.0
+	 *
+	 * @return string|int Empty string, if no error codes.
+	 */
+	public function get_error_code() {
+		$codes = $this->get_error_codes();
+
+		if ( empty( $codes ) ) {
+			return '';
+		}
+
+		return $codes[0];
+	}
+
+	/**
+	 * Retrieve all error messages or error messages matching code.
+	 *
+	 * @since 2.1.0
+	 *
+	 * @param string|int $code Optional. Retrieve messages matching code, if exists.
+	 * @return array Error strings on success, or empty array on failure (if using code parameter).
+	 */
+	public function get_error_messages( $code = '' ) {
+		// Return all messages if no code specified.
+		if ( empty( $code ) ) {
+			$all_messages = array();
+			foreach ( (array) $this->errors as $code => $messages ) {
+				$all_messages = array_merge( $all_messages, $messages );
+			}
+
+			return $all_messages;
+		}
+
+		if ( isset( $this->errors[ $code ] ) ) {
+			return $this->errors[ $code ];
+		} else {
+			return array();
+		}
+	}
+
+	/**
+	 * Get single error message.
+	 *
+	 * This will get the first message available for the code. If no code is
+	 * given then the first code available will be used.
+	 *
+	 * @since 2.1.0
+	 *
+	 * @param string|int $code Optional. Error code to retrieve message.
+	 * @return string
+	 */
+	public function get_error_message( $code = '' ) {
+		if ( empty( $code ) ) {
+			$code = $this->get_error_code();
+		}
+		$messages = $this->get_error_messages( $code );
+		if ( empty( $messages ) ) {
+			return '';
+		}
+		return $messages[0];
+	}
+
+	/**
+	 * Retrieve error data for error code.
+	 *
+	 * @since 2.1.0
+	 *
+	 * @param string|int $code Optional. Error code.
+	 * @return mixed Error data, if it exists.
+	 */
+	public function get_error_data( $code = '' ) {
+		if ( empty( $code ) ) {
+			$code = $this->get_error_code();
+		}
+
+		if ( isset( $this->error_data[ $code ] ) ) {
+			return $this->error_data[ $code ];
+		}
+	}
+
+	/**
+	 * Verify if the instance contains errors.
+	 *
+	 * @since 5.1.0
+	 *
+	 * @return bool
+	 */
+	public function has_errors() {
+		if ( ! empty( $this->errors ) ) {
+			return true;
+		}
+		return false;
+	}
+
+	/**
+	 * Add an error or append additional message to an existing error.
+	 *
+	 * @since 2.1.0
+	 *
+	 * @param string|int $code Error code.
+	 * @param string $message Error message.
+	 * @param mixed $data Optional. Error data.
+	 */
+	public function add( $code, $message, $data = '' ) {
+		$this->errors[ $code ][] = $message;
+		if ( ! empty( $data ) ) {
+			$this->error_data[ $code ] = $data;
+		}
+	}
+
+	/**
+	 * Add data for error code.
+	 *
+	 * The error code can only contain one error data.
+	 *
+	 * @since 2.1.0
+	 *
+	 * @param mixed $data Error data.
+	 * @param string|int $code Error code.
+	 */
+	public function add_data( $data, $code = '' ) {
+		if ( empty( $code ) ) {
+			$code = $this->get_error_code();
+		}
+
+		$this->error_data[ $code ] = $data;
+	}
+
+	/**
+	 * Removes the specified error.
+	 *
+	 * This function removes all error messages associated with the specified
+	 * error code, along with any error data for that code.
+	 *
+	 * @since 4.1.0
+	 *
+	 * @param string|int $code Error code.
+	 */
+	public function remove( $code ) {
+		unset( $this->errors[ $code ] );
+		unset( $this->error_data[ $code ] );
+	}
+}