Passthru Execution in PHP A Path to Troubleshooting Success

I have this PHP: $param = (...) // The $param is correct, this is not a problem! // -re token=123456 exec('program.php -r '.$param. To work around the passthrough problem, I tried using ob_start() and ob_get_clean() etc. and put pass thru in the middle. That does capture the ... I can run this command on the server by ssh but when I use PHP code, it's nothing. so I need to enale the exec function or different command on this version. There should not be any permission problem as the first exec command is creating the outsingle.txt file. Both the commands work perfectly on console. Thanks. I was using an exec-based line of code to create thumbnails from PDF files on other sites not in Cloud, which works great. I was forced to ... The passthru() function is similar to the exec() function in that it executes a command. This function should be used in place of exec() or system() I have php 7 installed on ubantu 16 .i have also installed imagemagick. now my php file say index.php with code below echo exec("whoami"); I need this exact information to be passed on to the browser / PHP script without any intervention. I am aware about the passthru function which ... WARNING! When you block functions in php.ini, some PHP-based apps may not work. See the troubleshooting section below. I tested these settings ... ... problems than solutions. Furthermore this will not work if you change php version, because you have to change your cron again. Much easier ...