我有一个应该启动我的屏幕保护程序的程序：
<?php
$cmd='automator /Users/myusername/Library/Services/Start_Screensaver.workflow';
shell_exec($cmd);
?>
当我用
运行它时php index.php
它运行正常但是当我尝试从浏览器运行它时，我总是在apache error_log文件中收到以下错误：
The workflow file does not exist.
我觉得非常奇怪，因为我从根文件夹开始有正确的路径。任何帮助，将不胜感激。谢谢！
另外，虽然我非常确定在我的mac上正确设置了apache，但我只能通过mac上的mac adres访问网页。因此，当我在手机上使用Mac的IP时，例如它无法加载页面，但是当我转到我的Raspberry Pi的IP地址（也运行apache）时，它可以正常工作。
编辑：要明确，这一点不是要在我的Mac上启动屏幕保护程序，而是从Tasker中的手机远程启动它
编辑：我将automator工作流程文件放在同一目录中并执行
sudo chmod 777 start_screensaver.workflow
现在我收到以下错误：
2015-12-24 19:12:26.376 automator[2313:462937] Not loading action at /Library/Automator/Create Table from Data in Workbook.action: No bundleIdentifier.
2015-12-24 19:12:26.377 automator[2313:462937] Not loading action at /Library/Automator/Save Outlook Messages as Files.action: No bundleIdentifier.
2015-12-24 19:12:26.677 automator[2313:462937] CFPasteboardRef CFPasteboardCreate(CFAllocatorRef, CFStringRef) : failed to create global data
2015-12-24 19:12:26.678 automator[2313:462937] CFPasteboardRef CFPasteboardCreate(CFAllocatorRef, CFStringRef) : failed to create global data
2015-12-24 19:12:26.679 automator[2313:462937] CFPasteboardRef CFPasteboardCreate(CFAllocatorRef, CFStringRef) : failed to create global data
2015-12-24 19:12:26.680 automator[2313:462937] CFPasteboardRef CFPasteboardCreate(CFAllocatorRef, CFStringRef) : failed to create global data
2015-12-24 19:12:27.692 Automator Runner[2314:462973] Not loading action at /Library/Automator/Create Table from Data in Workbook.action: No bundleIdentifier.
2015-12-24 19:12:27.692 Automator Runner[2314:462973] Not loading action at /Library/Automator/Save Outlook Messages as Files.action: No bundleIdentifier.
2015-12-24 19:12:27.757 Automator Runner[2314:462973] Script Monitor is missing or damaged: Error Domain=NSCocoaErrorDomain Code=256 "The application “ScriptMonitor” could not be launched because a miscellaneous error occurred (OSStatus -10810)." UserInfo={NSURL=file:///System/Library/CoreServices/ScriptMonitor.app/, NSLocalizedDescription=The application “ScriptMonitor” could not be launched because a miscellaneous error occurred (OSStatus -10810)., NSUnderlyingError=0x7f80f3411190 {Error Domain=NSOSStatusErrorDomain Code=-10810 "kLSUnknownErr: Unexpected internal error"}}
2015-12-24 19:12:27.758 Automator Runner[2314:462973] Script Monitor is missing or damaged
2015-12-24 19:12:27.843 Automator Runner[2314:462973] CFPasteboardRef CFPasteboardCreate(CFAllocatorRef, CFStringRef) : failed to create global data
2015-12-24 19:12:27.844 Automator Runner[2314:462973] CFPasteboardRef CFPasteboardCreate(CFAllocatorRef, CFStringRef) : failed to create global data
2015-12-24 19:12:27.844 Automator Runner[2314:462973] CFPasteboardRef CFPasteboardCreate(CFAllocatorRef, CFStringRef) : failed to create global data
2015-12-24 19:12:27.846 Automator Runner[2314:462973] CFPasteboardRef CFPasteboardCreate(CFAllocatorRef, CFStringRef) : failed to create global data
2015-12-24 19:12:27.872 Automator Runner[2314:462980] warning: failed to get scripting definition from /System/Library/Frameworks/ScreenSaver.framework/Resources/ScreenSaverEngine.app; it may not be scriptable.
2015-12-24 19:12:27.966 Automator Runner[2314:462980] Scripting Bridge could not launch application /System/Library/Frameworks/ScreenSaver.framework/Resources/ScreenSaverEngine.app.
2015-12-24 19:12:27.997 Automator Runner[2314:462973] Error writing cache to /Library/WebServer/Library/Caches/com.apple.automator.actionCache-user-standardLocations.plist: The folder “com.apple.automator.actionCache-user-standardLocations.plist” doesn’t exist.
2015-12-24 19:12:30.830 Automator Runner[2314:462973] Error writing cache to /Library/WebServer/Library/Caches/com.apple.automator.actionCache-system-standardLocations.plist: The folder “com.apple.automator.actionCache-system-standardLocations.plist” doesn’t exist.
2015-12-24 19:12:31.148 Automator Runner[2314:462973] Error writing cache to /Library/WebServer/Library/Caches/com.apple.automator.actionCache-bundleLocations.plist: The folder “com.apple.automator.actionCache-bundleLocations.plist” doesn’t exist.
答案 0 :(得分：1)
看起来您的Apache用户无权访问该目录。当你从cli运行php脚本时，你将它们作为myusername运行，但是，一旦你从浏览器打开它，它就是different user（_www）。
因此，您需要确保_www用户可以访问该文件。为该文件设置777的权限可能会做到这一点。
P.S。：btw @Mike绝对正确，您应该重新考虑使用脚本的方式。
屏幕保护程序启动，这很酷。所以，问题在于权限。所以，您可以尝试使用php内置服务器
运行它php -S localhost:8000 index.php
或者配置apache和change the apache user。
或者，您可以将所有与屏幕保护程序相关的内容移动到可公开访问的目录中，但同样，这可能会导致一些安全漏洞。