mysqli::set_local_infile_handler, mysqli_set_local_infile_handler

• mysqli::set_local_infile_handler

  mysqli_set_local_infile_handler

  Set callback function for LOAD DATA LOCAL INFILE command

Description

Object oriented stylebool mysqli::set_local_infile_handler(mysqli link,
callable read_func);

Procedural stylebool mysqli_set_local_infile_handler(mysqli link,
callable read_func);

Set callback function for LOAD DATA LOCAL INFILE command

The callbacks task is to read input from the file specified in the LOAD DATA LOCAL INFILE and to reformat it into the format understood by LOAD DATA INFILE.

The returned data needs to match the format specified in the LOAD DATA

Parameters

link

Procedural style only: A link identifier returned by mysqli_connect or mysqli_init

read_func

A callback function or object method taking the following parameters:

stream

A PHP stream associated with the SQL commands INFILE

&buffer

A string buffer to store the rewritten input into

buflen

The maximum number of characters to be stored in the buffer

&errormsg

If an error occurs you can store an error message in here

The callback function should return the number of characters stored in the buffer or a negative value if an error occurred.

Return Values

Returns TRUE on success or FALSE on failure.

Examples

Example 20.136. mysqli::set_local_infile_handler example

Object oriented style

<?php
 $db = mysqli_init();
 $db->real_connect('localhost','root','','test');
 function callme($stream, &$buffer, $buflen, &$errmsg)
 {
 $buffer = fgets($stream);
 echo $buffer;
 // convert to upper case and replace ',' delimiter with [TAB]
 $buffer = strtoupper(str_replace(',', '\t', $buffer));
 return strlen($buffer);
 }
 echo 'Input:\n';
 $db->set_local_infile_handler('callme');
 $db->query('LOAD DATA LOCAL INFILE 'input.txt' INTO TABLE t1');
 $db->set_local_infile_default();
 $res = $db->query('SELECT * FROM t1');
 echo '\nResult:\n';
 while ($row = $res->fetch_assoc()) {
 echo join(',', $row).'\n';
 }
?>

Procedural style

<?php
 $db = mysqli_init();
 mysqli_real_connect($db, 'localhost','root','','test');
 function callme($stream, &$buffer, $buflen, &$errmsg)
 {
 $buffer = fgets($stream);
 echo $buffer;
 // convert to upper case and replace ',' delimiter with [TAB]
 $buffer = strtoupper(str_replace(',', '\t', $buffer));
 return strlen($buffer);
 }
 echo 'Input:\n';
 mysqli_set_local_infile_handler($db, 'callme');
 mysqli_query($db, 'LOAD DATA LOCAL INFILE 'input.txt' INTO TABLE t1');
 mysqli_set_local_infile_default($db);
 $res = mysqli_query($db, 'SELECT * FROM t1');
 echo '\nResult:\n';
 while ($row = mysqli_fetch_assoc($res)) {
 echo join(',', $row).'\n';
 }
?>

The above examples will output:

Input:
23,foo
42,bar Output:
23,FOO
42,BAR

See Also

mysqli_set_local_infile_default

Retornar