Php runs normally on the computer, but does not solve the problem properly on the linux Terminal.

Php runs normally on the computer but does not solve the problem properly on the linux Terminal. My php file content: always prompts & nbsp; fatal & nbsp; error; & nbsp; call & nbsp; to & nbsp; a & nbsp; member & nbsp; function & nbsp; query () & nbsp; on & nbsp; a & n php runs normally on the computer but does not work properly on the linux Terminal.
My php file content:

Always prompts fatal error; call to a member function query () on a non-object online 16

$ DB-> connection-> query ("create table test (id integer primary key, name varchar (50), grade varchar (50), score varchar (50 ))"); this line of error always prompts me to paste it here

It is completely normal for me to run on the computer. I can insert data. when I run the data on a linux Terminal, I keep prompting that the error is going crazy. Is it a problem with terminal settings?



Header ("content-Type: text/html; charset = Utf-8 ");

// Obtain the data submitted on the uiceshi.html page
$ Fname = $ _ POST ['fname']; // name
$ Fgrade = $ _ POST ['fgrade ']; // grade
$ Fscore = $ _ POST ['fscore']; // score

// $ SQL = 'Insert into test values ();';

// Create a database instance

$ DB = new SQLite ('Blog. db'); // the database file name is arbitrary.

// Create a table named test
$ DB-> connection-> query ("create table test (id integer primary key, name varchar (50), grade varchar (50), score varchar (50 ))"); this line of error is prompted

// Execute the insert statement
// $ Result = $ DB-> query ("insert into test (name, grade, score) values ('". $ fname. "','". $ fgrade. "','". $ fscore. "')");
$ Result = $ DB-> connection-> query ("insert into test (name, grade, score) values ('". $ fname. "','". $ fgrade. "','". $ fscore. "')");

// The returned results are mainly used for debugging.
Print_r ($ result );


// SQLite class
Class SQLite
{
Function _ construct ($ file)
{
Try
{
$ This-> connection = new PDO ('sqlite: '. $ file );
}
Catch (PDOException $ e)
{
Try
{
$ This-> connection = new PDO ('sqlite2: '. $ file );
}
Catch (PDOException $ e)
{
Exit ('error! ');
}
}
}

Function _ destruct ()
{
$ This-> connection = null;
}

Function query ($ SQL) // Runs SQL directly, which can be used to update or delete data.
{
Return $ this-> connection-> query ($ SQL );
}

Function getlist ($ SQL) // retrieves the record list
{
$ Recordlist = array ();
Foreach ($ this-> query ($ SQL) as $ rstmp)
{
$ Recordlist [] = $ rstmp;
}
Return $ recordlist;
}

Function Execute ($ SQL)
{
Return $ this-> query ($ SQL)-> fetch ();
}

Function RecordArray ($ SQL)
{
Return $ this-> query ($ SQL)-> fetchAll ();
}