;ls ../../

<?php

if( isset( $_POST[ ‘submit‘ ] ) ) 
{
    //将ip对应的值复制给target
    $target = $_REQUEST[ ‘ip‘ ];
    
    if (stristr(php_uname(‘s‘), ‘Windows NT‘)) 
    { 
        //如果是winds就直接ping
    
        $cmd = shell_exec( ‘ping  ‘ . $target );
        echo ‘<pre>‘.$cmd.‘</pre>‘;
        
    } 
    else 
    { 
        //如果是Linux就默认ping 3个包
        $cmd = shell_exec( ‘ping  -c 3 ‘ . $target );
        echo ‘<pre>‘.$cmd.‘</pre>‘;
        
    }
    
}
?>

|| 或者  &;& 或者 &

<?php

if( isset( $_POST[ ‘submit‘] ) ) 
{

    $target = $_REQUEST[ ‘ip‘ ];

    // 过滤了 &&,;命令分割符
    $substitutions = array(
        ‘&&‘ => ‘‘,
        ‘;‘ => ‘‘,
    );

    $target = str_replace( array_keys( $substitutions ), $substitutions, $target );
    
    // Determine OS and execute the ping command.
    if (stristr(php_uname(‘s‘), ‘Windows NT‘)) { 
    
        $cmd = shell_exec( ‘ping  ‘ . $target );
        echo ‘<pre>‘.$cmd.‘</pre>‘;
        
    } else { 
    
        $cmd = shell_exec( ‘ping  -c 3 ‘ . $target );
        echo ‘<pre>‘.$cmd.‘</pre>‘;
        
    }
}

?>

<?php

if( isset( $_POST[ ‘submit‘ ] ) ) 
{

    $target = $_REQUEST["ip"];
    
    /*
        stripslashes() 函数删除由 addslashes() 函数添加的反斜杠。
     */
    
    $target = stripslashes( $target );
    
    
    // Split the IP into 4 octects
    $octet = explode(".", $target);
    
    // Check IF each octet is an integer
    if ((is_numeric($octet[0])) && (is_numeric($octet[1])) && (is_numeric($octet[2])) && (is_numeric($octet[3])) && (sizeof($octet) == 4)  ) 
    {
    
    // If all 4 octets are int‘s put the IP back together.
    $target = $octet[0].‘.‘.$octet[1].‘.‘.$octet[2].‘.‘.$octet[3];
    
    
        // Determine OS and execute the ping command.
        if (stristr(php_uname(‘s‘), ‘Windows NT‘)) 
        { 
    
            $cmd = shell_exec( ‘ping  ‘ . $target );
            echo ‘<pre>‘.$cmd.‘</pre>‘;
        
        } 
        else 
        { 
    
            $cmd = shell_exec( ‘ping  -c 3 ‘ . $target );
            echo ‘<pre>‘.$cmd.‘</pre>‘;
        
        }
    
    }
    else
    {
        echo ‘<pre>ERROR: You have entered an invalid IP</pre>‘;
    }
    
}

?>