PHP 4 to 7

<?php
$_GLOBALS['COMPNAME'] = "Perumda Tirta Amertha Buana";
foreach ( $_POST as $k => $v )
    $HTTP_POST_VARS[ $k ] = $v;
foreach ( $_GET as $k => $v )
    $HTTP_GET_VARS[ $k ] = $v;

function mysql_affected_rows( $link_identifier = NULL ){
    // Get number of affected rows in previous MySQL operation
    if ( ! $link_identifier )
        $link_identifier = $GLOBALS['GSAMP_BC_MYSQLCON'];
    return mysqli_affected_rows( $link_identifier );
}
function mysql_close( $link_identifier = NULL ){
    // Close MySQL connection
    if ( ! $link_identifier )
        $link_identifier = $GLOBALS['GSAMP_BC_MYSQLCON'];
    return mysqli_close( $link_identifier );
}
function mysql_connect( $server, $username, $password ){
    // Open a connection to a MySQL Server
    $mysqlCon = mysqli_connect( $server, $username, $password );
    $GLOBALS['GSAMP_BC_MYSQLCON'] = $mysqlCon;
    return $mysqlCon;
}
function mysql_error( $link_identifier ){
    // Returns the text of the error message from previous MySQL operation
    if ( ! $link_identifier )
        $link_identifier = $GLOBALS['GSAMP_BC_MYSQLCON'];
    return mysqli_error( $link_identifier );
}
const MYSQL_ASSOC = MYSQLI_ASSOC;
const MYSQL_NUM = MYSQLI_NUM;
const MYSQL_BOTH = MYSQLI_BOTH;
function mysql_fetch_array( $result, $result_type = MYSQL_BOTH ){
    // Fetch a result row as an associative array, a numeric array, or both
    return mysqli_fetch_array( $result, $result_type );
}
function mysql_fetch_assoc( $result ){
    // Fetch a result row as an associative array
    return mysqli_fetch_assoc( $result );
}
function mysql_fetch_object( $result, $class_name = "stdClass", $params = array() ){
    // Fetch a result row as an object
    return mysqli_fetch_object( $result, $class_name, $params );
}
function mysql_fetch_row( $result ){
    // Get a result row as an enumerated array
    return mysqli_fetch_row( $result );
}
function mysql_free_result( $result ){
    // Free result memory
    mysqli_free_result( $result );
    return TRUE;
}
function mysql_insert_id( $link_identifier = NULL ){
    // Get the ID generated in the last query
    if ( ! $link_identifier )
        $link_identifier = $GLOBALS['GSAMP_BC_MYSQLCON'];
    return mysqli_insert_id( $link_identifier );
}
function mysql_num_rows( $result ){
    // Get number of rows in result
    return mysqli_num_rows( $result );
}
function mysql_query( $query, $link_identifier = NULL ){
    // Send a MySQL query
    if ( ! $link_identifier )
        $link_identifier = $GLOBALS['GSAMP_BC_MYSQLCON'];
    return mysqli_query( $link_identifier, $query );
}
function mysql_real_escape_string( $unescaped_string, $link_identifier =NULL ){
    // Escapes special characters in a string for use in an SQL statement
    if ( ! $link_identifier )
        $link_identifier = $GLOBALS['GSAMP_BC_MYSQLCON'];
    return mysqli_real_escape_string( $link_identifier, $unescaped_string );
}
function mysql_result( $result, $row, $field = 0 ){
    // Get result data
    // Format "table.field" is not supported
    try {
        mysqli_data_seek( $result, $row );
        if ( is_numeric( $field ) ){
            $row = mysqli_fetch_row( $result );
        } else {
            $row = mysqli_fetch_assoc( $result );
        }
        return $row[ $field ];
    } catch (Exception $e) {
        return False;
    }
}
function mysql_select_db( $database_name, $link_identifier = NULL ){
    // Select a MySQL database
    if ( ! $link_identifier )
        $link_identifier = $GLOBALS['GSAMP_BC_MYSQLCON'];
    return mysqli_select_db( $link_identifier, $database_name );
}
function split( $pattern, $string, $limit=-1 ){
    return preg_split( "/" . str_replace( "/", "\\/", $pattern ) . "/", $string, $limit );
}