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PHP mysqli field_seek() Function

❮ PHP MySQLi Reference

Example - Object Oriented style

Set the field cursor to the second column ("Age") in the result-set, get field info with fetch_field(), then print the field's name, table, and max length:

<?php
$mysqli = new mysqli("localhost","my_user","my_password","my_db");

if ($mysqli -> connect_errno) {
  echo "Failed to connect to MySQL: " . $mysqli -> connect_error;
  exit();
}

$sql = "SELECT Lastname, Age FROM Persons ORDER BY Lastname";

if ($result = $mysqli -> query($sql)) {

  // Get field information for second column
  $result = field_seek(1);
  $fieldinfo = $result -> fetch_field();

  printf("Name: %s\n", $fieldinfo -> name);
  printf("Table: %s\n", $fieldinfo -> table);
  printf("Max. Len: %d\n", $fieldinfo -> max_length);
  $result -> free_result();
}

$mysqli -> close();
?>

Look at example of procedural style at the bottom.


Definition and Usage

The field_seek() / mysqli_field_seek() function sets the field cursor to the given field offset.


Syntax

Object oriented style:

$mysqli_result -> field_seek(fieldnr)

Procedural style:

mysqli_field_seek(result, fieldnr)

Parameter Values

Parameter Description
result Required. Specifies a result set identifier returned by mysqli_query(), mysqli_store_result() or mysqli_use_result()
fieldnr Required. Specifies the field number. Must be an integer from 0 to number of fields-1

Technical Details

Return Value: TRUE on success. FALSE on failure
PHP Version: 5+

Example - Procedural style

Set the field cursor to the second column ("Age") in the result-set, get field info with mysqli_fetch_field(), then print the field's name, table, and max length:

<?php
$con = mysqli_connect("localhost","my_user","my_password","my_db");

if (mysqli_connect_errno()) {
  echo "Failed to connect to MySQL: " . mysqli_connect_error();
  exit();
}

$sql="SELECT Lastname, Age FROM Persons ORDER BY Lastname";

if ($result = mysqli_query($con,$sql)) {

  // Get field information for second column
  mysqli_field_seek($result, 1);
  $fieldinfo = mysqli_fetch_field($result);

  printf("Name: %s\n", $fieldinfo -> name);
  printf("Table: %s\n", $fieldinfo -> table);
  printf("max. Len: %d\n", $fieldinfo -> max_length);
  mysqli_free_result($result);
}

mysqli_close($con);
?>


❮ PHP MySQLi Reference