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

说明

面向对象风格

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

过程化风格

bool 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

参数

link

仅以过程化样式：由mysqli_connect() 或 mysqli_init() 返回的链接标识。

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.

返回值

成功时返回 TRUE，或者在失败时返回 FALSE。

范例

Example #1 mysqli::set_local_infile_handler() example

面向对象风格


<?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";
  }
?>

过程化风格


<?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";
  }
?>

以上例程会输出：

Input:
23,foo
42,bar

Output:
23,FOO
42,BAR

参见

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