I am working on project where i need to execute jar file with PHP, i am using php exec function to execute jar file, When i am executing my php script from browser i am getting expected output, but when executing from command line i am getting error “Unable to access jarfile wrapper.jar”.

My php script having following code :

exec("java -jar wrapper.jar $arr[0] $arr[1] $arr[2] $arr[3] $arr[4] $arr[5] $arr[6] $arr[7] $arr[8] $arr[9]",$output);

PHP script and jar file wrapper.jar both are in same directory, Please check output below :

1. When executed from browser

   Array ( [0] => REFNUM : 1258740043092402176 [1] => ANumber : null [2] => Status : y [3] => Txn : cf77bd77-f365-475f-b9ba-814f16f3a123 )

which is expected output

2. When executed from command line

   Error: Unable to access jarfile wrapper.jar
   OUTPUT: Array
   (
   )

as it is CLI, i also change my code to provide absolute path to jar file as per below :

exec("java -jar 'D:xampphtdocsAVAULTwrapper.jar' $arr[0] $arr[1] $arr[2] $arr[3] $arr[4] $arr[5] $arr[6] $arr[7] $arr[8] $arr[9]",$output);

i got following output :

Error: Unable to access jarfile wrapper.jar OUTPUT: Array ( )

I have also checked exec('java -version',$output), it shows me correct java version installed on my system on both browser and command line

I have also noticed when used single quote and double quotes in exec function it behaves differently

with double quotes (in broswer)

exec("java -jar wrapper.jar $arr[0] $arr[1] $arr[2] $arr[3] $arr[4] $arr[5] $arr[6] $arr[7] $arr[8] $arr[9]",$output);

output :

 Array ( [0] => REFNUM : 1258740043092402176 [1] => ANumber : null [2] => Status : y [3] => Txn : 01bac91a-9dd5-4886-9ca1-2166233af827 )

with single quotes (in broswer)

exec('java -jar wrapper.jar $arr[0] $arr[1] $arr[2] $arr[3] $arr[4] $arr[5] $arr[6] $arr[7] $arr[8] $arr[9]',$output);

output :

Array ( [0] => ERROR : MISMATCH_AC_SA [1] => Status : n [2] => ANumber : Null [3] => Txn : ec883e3f-e8e7-4feb-ac37-9ce9f36d3d0b )

I don’t know why different behavior whith single and double quotes.

However my actual requirement is to execute jar file from php command line.

I am really confused

1. Why while executing jar file from command line which is in same directory as php script, i got unable access jar file error even with absolute path to jar file
2. Why exec function behaves differently with single quotes and double quotes