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getting output and exit status from shell_exec()

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php

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What does Shell_exec return?

The shell_exec() function is an inbuilt function in PHP which is used to execute the commands via shell and return the complete output as a string. The shell_exec is an alias for the backtick operator, for those used to *nix.

What is Shell exec?

Updated: 05/04/2019 by Computer Hope. On Unix-like operating systems, exec is a builtin command of the Bash shell. It lets you execute a command that completely replaces the current process. The current shell process is destroyed, and entirely replaced by the command you specify.


As you've already seen, when using shell_exec you have to chain your "real" command with echo $? to get the exit status:

 $output_including_status = shell_exec("command 2>&1; echo $?");

but if you want the clean way, then you want to use the exec function, which allows a 3rd agument explicitly for this purpose.


Use exec() or popen() (+ manual handling of the process) instead.


Following worked for me with exec() to show the output

exec(your_command, $output, $return_var);
var_dump($output);
var_dump($return_var);