cubrid_lob2_read

(PECL CUBRID >= 8.4.1)

cubrid_lob2_read — Read from BLOB/CLOB data.

Описание

string cubrid_lob2_read ( resource $lob_identifier , int $len )

The cubrid_lob2_read() function reads len bytes from the LOB data, then return it.

Список параметров

lob_identifier -

Lob identifier as a result of cubrid_lob2_new() or get from the result set.

len -

Length from buffer you want to read from the lob data.

Возвращаемые значения

Returns the contents as a string.

FALSE when there is no more data.

NULL on failure.

Примеры

Пример #1 cubrid_lob2_read() example 1

// test_lob (id INT, contents CLOB)
$conn = cubrid_connect("localhost", 33000, "demodb", "public", "");
$req = cubrid_execute($conn, "select * from test_lob");
$row = cubrid_fetch_row($req, CUBRID_LOB);
print "position now is " . cubrid_lob2_tell($row[1]) . "\n";
cubrid_lob2_seek($row[1], 10, CUBRID_CURSOR_FIRST);
print "\nposition after moving forword is " . cubrid_lob2_tell($row[1]) . "\n";
$data = cubrid_lob2_read($lob, 12);
print "\nposition after reading is " . cubrid_lob2_tell($row[1]) . "\n";
print $data . "\n";
cubrid_lob2_seek($row[1], 5, CUBRID_CURSOR_CURRENT);
print "\nposition after moving again is " . cubrid_lob2_tell($row[1]) . "\n";
$data = cubrid_lob2_read($lob, 20);
print $data . "\n";
cubrid_disconnect($conn);

Пример #2 cubrid_lob2_read() example 2

// test_lob (id INT, contents CLOB)
$conn = cubrid_connect("localhost", 33000, "demodb", "public", "");
$req = cubrid_execute($conn, "select * from test_lob");
$row = cubrid_fetch_row($req, CUBRID_LOB);
while (true) {
    if ($data = cubrid_lob2_read($lob, 1024)) {
        print $data . "\n";
    }
    elseif ($data === false) {
        print "There is no more data\n";
        break;
    }
    else {
        print "There must some errors\n";
        break;
    }
}
cubrid_disconnect($conn);

Смотрите также

• cubrid_lob2_write() - Write to a lob object.
• cubrid_lob2_seek() - Move the cursor of a lob object.
• cubrid_lob2_seek64() - Move the cursor of a lob object.
• cubrid_lob2_tell() - Tell the cursor position of the LOB object.
• cubrid_lob2_tell64() - Tell the cursor position of the LOB object.
• cubrid_lob2_size() - Get a lob object's size.
• cubrid_lob2_size64() - Get a lob object's size.

Описание на ru2.php.net
Описание на php.ru