mysqli::set_local_infile_handler

mysqli_set_local_infile_handler

(PHP 5, PHP 7)

mysqli::set_local_infile_handler -- mysqli_set_local_infile_handler — Set callback function for LOAD DATA LOCAL INFILE command

Opis

Styl obiektowy

mysqli::set_local_infile_handler ( mysqli $link , callable $read_func ) : bool

Styl proceduralny

mysqli_set_local_infile_handler ( mysqli $link , callable $read_func ) : bool

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

Parametry

połączenie

Tylko styl proceduralny: Identyfikator połączenia zwrócony przez mysqli_connect() lub 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.

Zwracane wartości

Zwraca TRUE w przypadku powodzenia, FALSE w przypadku błędu.

Przykłady

Przykład #1 mysqli::set_local_infile_handler() example

Styl obiektowy


<?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";
  }
?>

Styl proceduralny


<?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";
  }
?>

Powyższe przykłady wyświetlą:

Input:
23,foo
42,bar

Output:
23,FOO
42,BAR

Zobacz też:

mysqli_set_local_infile_default() - Unsets user defined handler for load local infile command

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