PHP can't run Matlab function

I want run Matlab function from PHP I run this code on MAC, local server using MAMP and Matlab R2016b. this is my php code:

    exec ($command = "/Applications/MATLAB_R2016b.app/Contents/MacOS/StartMATLAB computeSIFT.m ");

When i execute that code it's works and Matlab can open 'copmputeSIFT.m' file. But when i want to call Matlab and call 'computeSIFT()' function, there is nothing happened.I think there is no mistake on my code. this is the code:

    exec($command = "/Applications/MATLAB_R2016b.app/Contents/MacOS/StartMATLAB nojvm -nodesktop -nodisplay -r \"computeSIFT()\"");

I already search on google, copy paste their code and the result is the same when there is '-r' on my command.Is there some different syntax on matlab R2016b?