php exec可以'；尽管请求的路径正确，但找不到Java JVM dll

我有以下PHP代码：

$compileCSS = "C:\ApacheFlexSDK\bin\mxmlc.exe
C:\inetpub\utils\css\\". $_POST['cssFileName'] . ".css" . " 2>&1";
exec ( $compileCSS, $output );
// uncomment to see the response to command
print_r($output); 

C:\ApacheFlexSDK\bin\mxmlc.exe
    C:\inetpub\utils\css\sample.css 2>&1

Array ( [0] => Error loading: C:\Program Files (x86)\Java\jre1.8.0_121\bin\client\jvm.dll ) 

它运行如下命令：

$compileCSS = "C:\ApacheFlexSDK\bin\mxmlc.exe
C:\inetpub\utils\css\\". $_POST['cssFileName'] . ".css" . " 2>&1";
exec ( $compileCSS, $output );
// uncomment to see the response to command
print_r($output); 

C:\ApacheFlexSDK\bin\mxmlc.exe
    C:\inetpub\utils\css\sample.css 2>&1

Array ( [0] => Error loading: C:\Program Files (x86)\Java\jre1.8.0_121\bin\client\jvm.dll ) 

当我运行此命令时，会出现以下错误：

$compileCSS = "C:\ApacheFlexSDK\bin\mxmlc.exe
C:\inetpub\utils\css\\". $_POST['cssFileName'] . ".css" . " 2>&1";
exec ( $compileCSS, $output );
// uncomment to see the response to command
print_r($output); 

C:\ApacheFlexSDK\bin\mxmlc.exe
    C:\inetpub\utils\css\sample.css 2>&1

Array ( [0] => Error loading: C:\Program Files (x86)\Java\jre1.8.0_121\bin\client\jvm.dll ) 

C:\ProgramFiles（x86）\Java\jre1.8.0\u 121\bin\client\jvm.dll

是正确的，并且这里有一个jvm.dll

当我直接从命令行运行该命令时，它工作正常，即生成一个SWF文件（mxmlc是ApacheFlex编译器）

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找不到如何解决此问题，请提供帮助。

如果应用程序的参数有空格，则必须使用path或双引号将其包装到应用程序：

$cmd = 'targetapp.exe "C:\my other path with spaces\targetfile.xxx"';
exec($cmd);


$cmd = '"C:\my path with spaces\targetapp.exe" C:\mypathnospaces\targetfile.xxx';
exec($cmd);