Converting .docx to pdf with libreoffice using php -


i trying convert .docx file .pdf using libreoffice.

my libreoffice installed directory 

c:\program files\libreoffice 4

using commandline getting output with

c:\program files\libreoffice 4\program>soffice.exe -headless -convert-to pdf c:\temp\test.docx -outdir c:\temp

but in php no output 

$command = '"c:\program files\libreoffice 4\program\soffice.exe" -headless -convert-to pdf c:\temp\test.docx -outdir c:\temp'; exec($command, $output);

how solve ? inadvance.


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