Shell function to execute command and redirect output

I am not so familiar with shell script syntax and protocols.

I have written following function which accepts

• a command string as a mandetory parameter
• ignore error as an optional parameter

--

function quit {
    \rm -f "~/script.lock"
    exit
}

function abnormal_quit {
    echo $'\n'
    echo "Script Execution Terminated Abnormally.."
    echo "STATUS :: FAIL"
    quit
}

function exec_cmd {
    command="$1"
    continue_on_error="true"
    if [ -z "$2" ]; then
        continue_on_error="false"
    fi

    echo "========================================================"
    echo "Executing command :-"
    echo "$command ....."

    if ${command[@]}
    then
        echo "Command Executed successfully with return code : $?"
        echo "COMMAND - $command"
        echo "==============================================================="
        echo $'\n'
    else
        echo "Failed to execute command with return code :- $?"
        echo "COMMAND - $command"
        echo "==============================================================="
        echo $'\n'
        if [ $continue_on_error == "false" ]; then
            abnormal_quit
        fi
    fi
}

log_file="output.log"
exec_cmd "ls -lrt >> $log_file"

If I execute above shell script it gives me following error

[root@localhost data]# sh test.sh
========================================================
Executing command :-
ls -lrt >> log.out .....
ls: >>: No such file or directory
ls: log.out: No such file or directory
Failed to execute command with return code :- 2
COMMAND - ls -lrt >> log.out
===============================================================

Script Execution Terminated Abnormally..
STATUS :: FAIL

The issue here is - The shell script assume "ls -lrt >> log.out" as a single command and the redirection arrows are considered as an filename argument to the "ls" command. Hence throws an error ">>: No such file or directory"