mysqli_stmt::send_long_data

mysqli_stmt_send_long_data

(PHP 5)

mysqli_stmt::send_long_data -- mysqli_stmt_send_long_dataSend data in blocks

Description

Object oriented style

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

Procedural style

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

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.

Parameters

stmt

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

param_nr

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

data

A string containing data to be sent.

Return Values

Returns TRUE on success or FALSE on failure.

Examples

Example #1 Object oriented style

<?php
$stmt 
$mysqli->prepare("INSERT INTO messages (message) VALUES (?)");
$null NULL;
$stmt->bind_param("b"$null);
$fp fopen("messages.txt""r");
while (!
feof($fp)) {
    
$stmt->send_long_data(0fread($fp8192));
}
fclose($fp);
$stmt->execute();
?>

See Also

Коментарии

Автор:
Just in case:

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

Further info: http://dev.mysql.com/doc/refman/4.1/en/packet-too-large.html

HTH.
2006-05-16 22:00:41
http://php5.kiev.ua/manual/ru/mysqli-stmt.send-long-data.html
Автор:
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.
2019-11-28 14:40:25
http://php5.kiev.ua/manual/ru/mysqli-stmt.send-long-data.html
Автор:
To ChrisH's note, you must call this function multiple times with the same $param_nr, to send the first max_allowed_packet bytes, then the next, and so on. So you might need to do a for loop over changing substr() indexes, or etc.
2021-02-21 14:50:26
http://php5.kiev.ua/manual/ru/mysqli-stmt.send-long-data.html

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