diff --git a/Input/ArgvInput.php b/Input/ArgvInput.php
index 63f40f27..c576fbf6 100644
--- a/Input/ArgvInput.php
+++ b/Input/ArgvInput.php
@@ -238,7 +238,7 @@ class ArgvInput extends Input
     /**
      * {@inheritdoc}
      */
-    public function getFirstArgument()
+    public function getFirstArgument(): ?string
     {
         $isOption = false;
         foreach ($this->tokens as $i => $token) {
@@ -273,7 +273,7 @@ class ArgvInput extends Input
     /**
      * {@inheritdoc}
      */
-    public function hasParameterOption($values, $onlyParams = false)
+    public function hasParameterOption(string|array $values, bool $onlyParams = false): bool
     {
         $values = (array) $values;
 
@@ -298,7 +298,7 @@ class ArgvInput extends Input
     /**
      * {@inheritdoc}
      */
-    public function getParameterOption($values, $default = false, $onlyParams = false)
+    public function getParameterOption(string|array $values, string|bool|int|float|array|null $default = false, bool $onlyParams = false)
     {
         $values = (array) $values;
         $tokens = $this->tokens;
diff --git a/Input/Input.php b/Input/Input.php
index d7f29073..58cfd676 100644
--- a/Input/Input.php
+++ b/Input/Input.php
@@ -80,7 +80,7 @@ abstract class Input implements InputInterface, StreamableInputInterface
     /**
      * {@inheritdoc}
      */
-    public function isInteractive()
+    public function isInteractive(): bool
     {
         return $this->interactive;
     }
@@ -96,7 +96,7 @@ abstract class Input implements InputInterface, StreamableInputInterface
     /**
      * {@inheritdoc}
      */
-    public function getArguments()
+    public function getArguments(): array
     {
         return array_merge($this->definition->getArgumentDefaults(), $this->arguments);
     }
@@ -116,7 +116,7 @@ abstract class Input implements InputInterface, StreamableInputInterface
     /**
      * {@inheritdoc}
      */
-    public function setArgument($name, $value)
+    public function setArgument(string $name, mixed $value)
     {
         if (!$this->definition->hasArgument((string) $name)) {
             throw new InvalidArgumentException(sprintf('The "%s" argument does not exist.', $name));
@@ -128,7 +128,7 @@ abstract class Input implements InputInterface, StreamableInputInterface
     /**
      * {@inheritdoc}
      */
-    public function hasArgument($name)
+    public function hasArgument($name): bool
     {
         return $this->definition->hasArgument((string) $name);
     }
@@ -136,7 +136,7 @@ abstract class Input implements InputInterface, StreamableInputInterface
     /**
      * {@inheritdoc}
      */
-    public function getOptions()
+    public function getOptions(): array
     {
         return array_merge($this->definition->getOptionDefaults(), $this->options);
     }
@@ -156,7 +156,7 @@ abstract class Input implements InputInterface, StreamableInputInterface
     /**
      * {@inheritdoc}
      */
-    public function setOption($name, $value)
+    public function setOption(string $name, mixed $value)
     {
         if (!$this->definition->hasOption($name)) {
             throw new InvalidArgumentException(sprintf('The "%s" option does not exist.', $name));
@@ -168,7 +168,7 @@ abstract class Input implements InputInterface, StreamableInputInterface
     /**
      * {@inheritdoc}
      */
-    public function hasOption($name)
+    public function hasOption($name): bool
     {
         return $this->definition->hasOption($name);
     }
diff --git a/Input/InputInterface.php b/Input/InputInterface.php
index 8efc6232..a723a5ae 100644
--- a/Input/InputInterface.php
+++ b/Input/InputInterface.php
@@ -18,146 +18,133 @@ use Symfony\Component\Console\Exception\RuntimeException;
  * InputInterface is the interface implemented by all input classes.
  *
  * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @method string __toString() Returns a stringified representation of the args passed to the command.
+ *                             InputArguments MUST be escaped as well as the InputOption values passed to the command.
  */
 interface InputInterface
 {
-    /**
-     * Returns the first argument from the raw parameters (not parsed).
-     *
-     * @return string|null The value of the first argument or null otherwise
-     */
-    public function getFirstArgument();
-
-    /**
-     * Returns true if the raw parameters (not parsed) contain a value.
-     *
-     * This method is to be used to introspect the input parameters
-     * before they have been validated. It must be used carefully.
-     * Does not necessarily return the correct result for short options
-     * when multiple flags are combined in the same option.
-     *
-     * @param string|array $values     The values to look for in the raw parameters (can be an array)
-     * @param bool         $onlyParams Only check real parameters, skip those following an end of options (--) signal
-     *
-     * @return bool true if the value is contained in the raw parameters
-     */
-    public function hasParameterOption($values, $onlyParams = false);
-
-    /**
-     * Returns the value of a raw option (not parsed).
-     *
-     * This method is to be used to introspect the input parameters
-     * before they have been validated. It must be used carefully.
-     * Does not necessarily return the correct result for short options
-     * when multiple flags are combined in the same option.
-     *
-     * @param string|array                     $values     The value(s) to look for in the raw parameters (can be an array)
-     * @param string|bool|int|float|array|null $default    The default value to return if no result is found
-     * @param bool                             $onlyParams Only check real parameters, skip those following an end of options (--) signal
-     *
-     * @return mixed The option value
-     */
-    public function getParameterOption($values, $default = false, $onlyParams = false);
-
-    /**
-     * Binds the current Input instance with the given arguments and options.
-     *
-     * @throws RuntimeException
-     */
-    public function bind(InputDefinition $definition);
-
-    /**
-     * Validates the input.
-     *
-     * @throws RuntimeException When not enough arguments are given
-     */
-    public function validate();
-
-    /**
-     * Returns all the given arguments merged with the default values.
-     *
-     * @return array<string|bool|int|float|array|null>
-     */
-    public function getArguments();
-
-    /**
-     * Returns the argument value for a given argument name.
-     *
-     * @param string $name The argument name
-     *
-     * @return mixed
-     *
-     * @throws InvalidArgumentException When argument given doesn't exist
-     */
-    public function getArgument($name);
-
-    /**
-     * Sets an argument value by name.
-     *
-     * @param string $name  The argument name
-     * @param mixed  $value The argument value
-     *
-     * @throws InvalidArgumentException When argument given doesn't exist
-     */
-    public function setArgument($name, $value);
-
-    /**
-     * Returns true if an InputArgument object exists by name or position.
-     *
-     * @param string $name The argument name
-     *
-     * @return bool true if the InputArgument object exists, false otherwise
-     */
-    public function hasArgument($name);
-
-    /**
-     * Returns all the given options merged with the default values.
-     *
-     * @return array<string|bool|int|float|array|null>
-     */
-    public function getOptions();
-
-    /**
-     * Returns the option value for a given option name.
-     *
-     * @param string $name The option name
-     *
-     * @return mixed
-     *
-     * @throws InvalidArgumentException When option given doesn't exist
-     */
-    public function getOption($name);
-
-    /**
-     * Sets an option value by name.
-     *
-     * @param string $name  The option name
-     * @param mixed  $value The option value
-     *
-     * @throws InvalidArgumentException When option given doesn't exist
-     */
-    public function setOption($name, $value);
-
-    /**
-     * Returns true if an InputOption object exists by name.
-     *
-     * @param string $name The InputOption name
-     *
-     * @return bool true if the InputOption object exists, false otherwise
-     */
-    public function hasOption($name);
-
-    /**
-     * Is this input means interactive?
-     *
-     * @return bool
-     */
-    public function isInteractive();
-
-    /**
-     * Sets the input interactivity.
-     *
-     * @param bool $interactive If the input should be interactive
-     */
-    public function setInteractive($interactive);
-}
+  /**
+   * Returns the first argument from the raw parameters (not parsed).
+   */
+  public function getFirstArgument(): ?string;
+
+  /**
+   * Returns true if the raw parameters (not parsed) contain a value.
+   *
+   * This method is to be used to introspect the input parameters
+   * before they have been validated. It must be used carefully.
+   * Does not necessarily return the correct result for short options
+   * when multiple flags are combined in the same option.
+   *
+   * @param string|array $values     The values to look for in the raw parameters (can be an array)
+   * @param bool         $onlyParams Only check real parameters, skip those following an end of options (--) signal
+   */
+  public function hasParameterOption(string|array $values, bool $onlyParams = false): bool;
+
+  /**
+   * Returns the value of a raw option (not parsed).
+   *
+   * This method is to be used to introspect the input parameters
+   * before they have been validated. It must be used carefully.
+   * Does not necessarily return the correct result for short options
+   * when multiple flags are combined in the same option.
+   *
+   * @param string|array                     $values     The value(s) to look for in the raw parameters (can be an array)
+   * @param string|bool|int|float|array|null $default    The default value to return if no result is found
+   * @param bool                             $onlyParams Only check real parameters, skip those following an end of options (--) signal
+   *
+   * @return mixed
+   */
+  public function getParameterOption(string|array $values, string|bool|int|float|array|null $default = false, bool $onlyParams = false);
+
+  /**
+   * Binds the current Input instance with the given arguments and options.
+   *
+   * @return void
+   *
+   * @throws RuntimeException
+   */
+  public function bind(InputDefinition $definition);
+
+  /**
+   * Validates the input.
+   *
+   * @return void
+   *
+   * @throws RuntimeException When not enough arguments are given
+   */
+  public function validate();
+
+  /**
+   * Returns all the given arguments merged with the default values.
+   *
+   * @return array<string|bool|int|float|array|null>
+   */
+  public function getArguments(): array;
+
+  /**
+   * Returns the argument value for a given argument name.
+   *
+   * @return mixed
+   *
+   * @throws InvalidArgumentException When argument given doesn't exist
+   */
+  public function getArgument(string $name);
+
+  /**
+   * Sets an argument value by name.
+   *
+   * @return void
+   *
+   * @throws InvalidArgumentException When argument given doesn't exist
+   */
+  public function setArgument(string $name, mixed $value);
+
+  /**
+   * Returns true if an InputArgument object exists by name or position.
+   */
+  public function hasArgument(string $name): bool;
+
+  /**
+   * Returns all the given options merged with the default values.
+   *
+   * @return array<string|bool|int|float|array|null>
+   */
+  public function getOptions(): array;
+
+  /**
+   * Returns the option value for a given option name.
+   *
+   * @return mixed
+   *
+   * @throws InvalidArgumentException When option given doesn't exist
+   */
+  public function getOption(string $name);
+
+  /**
+   * Sets an option value by name.
+   *
+   * @return void
+   *
+   * @throws InvalidArgumentException When option given doesn't exist
+   */
+  public function setOption(string $name, mixed $value);
+
+  /**
+   * Returns true if an InputOption object exists by name.
+   */
+  public function hasOption(string $name): bool;
+
+  /**
+   * Is this input means interactive?
+   */
+  public function isInteractive(): bool;
+
+  /**
+   * Sets the input interactivity.
+   *
+   * @return void
+   */
+  public function setInteractive(bool $interactive);
+}
\ No newline at end of file