getting message: oci_execute(): ORA-00942: table or view does not exist

@ahmed Haroon,

How is Oracle configured with PHP?  What does your PHP.ini file say for oracle?

i have modified php.ini file ( in C:\wamp64\bin\apache\apache2.4.35\bin ), line un-remarked for
extension=oci8_12c

is there anything else to do in this file, i don't know about. i have tried various entries found on web but didn't worked yet. the following entries i have to mention with Error messages: ( now i removed entry in database.php for mysql and keep for oracle only as default and here i am posting partial entries to avoid long list )

PHP Code:

//Message: oci_connect(): ORA-01017: invalid username/password; logon denied


    $db['default'] = array(
    'dsn'   => 'oci:dbname=(DESCRIPTION =
                (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
                (CONNECT_DATA =
                  (SERVER = DEDICATED)
                  (SERVICE_NAME = orclpdb)
                )
              )',
    'port'  => 1521,
    'hostname' => '',
    'username' => 'hr',
    'password' => 'hr',
    'database' => '',
    'dbdriver' => 'oci8',
    'dbprefix' => '',
    'pconnect' => FALSE,
);

//and this

$db['default'] = array(
    'dsn'   => 'oci:dbname=localhost/orclpdb',
    'port'  => 1521,
    'hostname' => '',
    'username' => 'hr',
    'password' => 'hr',
    'database' => '',
    'dbdriver' => 'oci8',
    'dbprefix' => '',
    'pconnect' => FALSE,


//Message: oci_execute(): ORA-00942: table or view does not exist


    $db['default'] = array(
    'dsn'   => '',
    'port'  => 1521,
    'hostname' => 'localhost',
    'username' => 'hr',
    'password' => 'hr',
    'database' => 'orclpdb',
    'dbdriver' => 'oci8',
    'dbprefix' => '',
    'pconnect' => FALSE,

//and this

$db['default'] = array(
    'dsn'   => 'oci:dbname=localhost/orclpdb',
    'port'  => 1521,
    'hostname' => 'localhost',
    'username' => 'hr',
    'password' => 'hr',
    'database' => 'orclpdb',
    'dbdriver' => 'oci8',
    'dbprefix' => '',
    'pconnect' => FALSE,

//and this

$dbhost = "127.0.0.1"; //host 
$dbport= "1521"; //port default is 1521 
$dbname = "orclpdb"; //name of database 
$dbuser = "hr"; //db user with all priviliges
$dbpassword = "hr"; // password of user
$dbConnString = "(DESCRIPTION =(ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP)(HOST = ". $dbhost .")(PORT = ". $dbport ."))
)(CONNECT_DATA =(SERVICE_NAME = ". $dbname .")))"; // connection string for this we must create TNS entry for Oracle 
$db['default']['hostname'] = $dbConnString;
$db['default']['username'] = $dbuser;
$db['default']['password'] = $dbpassword;
$db['default']['database'] = "";
$db['default']['dbdriver'] = "oci8";
$db['default']['dbprefix'] = "";
$db['default']['pconnect'] = FALSE;
$db['default']['db_debug'] = TRUE;
$db['default']['cache_on'] = FALSE;
$db['default']['cachedir'] = "";
$db['default']['char_set'] = "utf8";
$db['default']['dbcollat'] = "utf8_general_ci";