Elevate Your PHP Skills Decoding the Enigma of Passthru Return Codes

Return code 127 normally means command not found. So I made sure to use the absolute path to the binary. No change. Apache is configure to run ... ... exec("/usr/bin/gpg --list-keys",$output,$return); > > This, and everything like it, except "gpg --help" returns an exit code > of 2, with ... 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() So it's possible that the user under which the exec() call is being made (possibly apache, rather than php) doesn't even have access to the ... the output I want, php doesn't give me any ouput at all. Asking exec() for output on a basic function like 'ls' does return a value, so the ... Try this code to see the error, where $command is the command you want to exec: $c = system($command." 2>&1"); echo "
SYSTEM: ".$c; All 3 PHP functions: exec(), system() and passthru() executes an external command, but the differences are: exec(): returns the last line of ... B.23 ExecTask ; passthru, Boolean, Whether to use PHP's passthru() function instead of exec(). ; logoutput, Boolean, Whether to log returned output as MSG_INFO ... It replaces PHP functions like exec, passthru, shell_exec and system: 1 2 3 ... Executing PHP Code in Isolation. If you want to execute some PHP code in ... The following code ran fine in PHP under apache but is failing to run under nginx/php-fpm: exec( "/usr/bin/xvfb-run -a -s '-screen 0 640x480x16'