无法为php安装intl扩展

Question

我一直在尝试在命令行界面上安装php的sudo pecl install intl 扩展名。但是遇到了一些困难。

当我跑步时：

fatal error: 'ext/standard/php_smart_str.h' file not found
#include <ext/standard/php_smart_str.h>

我收到以下错误：

extension UIViewController {

   func setupViewResizerOnKeyboardShown() {
        NotificationCenter.default.addObserver(self,
                                           selector: #selector(self.keyboardWillShowForResizing),
                                           name: 
        Notification.Name.UIKeyboardWillShow,
                                           object: nil)
        NotificationCenter.default.addObserver(self,
                                           selector: #selector(self.keyboardWillHideForResizing),
                                           name: Notification.Name.UIKeyboardWillHide,
                                           object: nil)
        }

   @objc func keyboardWillShowForResizing(notification: Notification) {
        if let keyboardSize = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue,
        let window = self.view.window?.frame {
        // We're not just minusing the kb height from the view height because
        // the view could already have been resized for the keyboard before
        self.view.frame = CGRect(x: self.view.frame.origin.x,
                                 y: self.view.frame.origin.y,
                                 width: self.view.frame.width,
                                 height: window.origin.y + window.height - keyboardSize.height)
      } else {
        debugPrint("We're showing the keyboard and either the keyboard size or window is nil: panic widely.")
      }
  }

   @objc func keyboardWillHideForResizing(notification: Notification) {
     if let keyboardSize = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
        let viewHeight = self.view.frame.height
        self.view.frame = CGRect(x: self.view.frame.origin.x,
                                 y: self.view.frame.origin.y,
                                 width: self.view.frame.width,
                                 height: viewHeight + keyboardSize.height)
    } else {
        debugPrint("We're about to hide the keyboard and the keyboard size is nil. Now is the rapture.")
    }
   }
 }

有人可以帮帮我吗？