PHP Conference China 2020



(PHP 5, PHP 7)

mysqli_stmt::send_long_data -- mysqli_stmt_send_long_dataSend data in blocks


Object oriented style

public mysqli_stmt::send_long_data ( int $param_nr , string $data ) : bool

Procedural style

mysqli_stmt_send_long_data ( mysqli_stmt $stmt , int $param_nr , string $data ) : bool

Allows to send parameter data to the server in pieces (or chunks), e.g. if the size of a blob exceeds the size of max_allowed_packet. This function can be called multiple times to send the parts of a character or binary data value for a column, which must be one of the TEXT or BLOB datatypes.



Procedural style only: A statement identifier returned by mysqli_stmt_init().


Indicates which parameter to associate the data with. Parameters are numbered beginning with 0.


A string containing data to be sent.

Return Values

Returns TRUE on success or FALSE on failure.


Example #1 Object oriented style

$mysqli->prepare("INSERT INTO messages (message) VALUES (?)");
$null NULL;
$fp fopen("messages.txt""r");
while (!
feof($fp)) {

See Also

add a note add a note

User Contributed Notes 3 notes

Gustavo Narea
14 years ago
Just in case:

'max_allowed_packet' is a MySQL variable; it is not a PHP function/variable/constant.

Further info:

9 months ago
If you are trying to write a single field which is above max_allowed_packet then this function will not help you (contrary to what the documentation example seems to show above).

Parameters in MySQL are still restricted by max_allowed_packet on a per-field basis so you will get an error like:

“mysqli_sql_exception: Parameter of prepared statement which is set through mysql_send_long_data() is longer than 'max_long_data_size' bytes”

The only real use case for this function seems to be if you are writing multiple long fields which when combined would go over max_allowed_packet.
lussnig at smcc dot de
14 years ago
send_long_data() these function is normaly used to store Data in Binary blob field. But if the table is UTF8 and connection charset it does not expect binary data (for example images) it take utf8 Data.
This mean you have to do utf8_encode bevore sending binary data.
To Top