PHP mysqli_fetch_field() Function

In this chapter you will learn:

Definition for PHP mysqli_fetch_field() Function
Syntax for PHP mysqli_fetch_field() Function
Parameter for PHP mysqli_fetch_field() Function
Return for PHP mysqli_fetch_field() Function
Example - returns the next column in the result set, then print each field's name, table, and max length

Definition

The mysqli_fetch_field() function returns the next column in the result set as an object.

Syntax

PHP mysqli_fetch_field() Function has the following syntax.

mysqli_fetch_field(result);

Parameter

Parameter	Is Required	Description
result	Required.	Result set returned by mysqli_query(), mysqli_store_result() or mysqli_use_result()

Return

It returns an object containing column definition or FALSE for failure. The returning object has the following properties:

Property Name	Meaning
name	name of the column
orgname	original column name (if an alias is used)
table	name of table
orgtable	original table name (if an alias is used)
def	reserved for default values
db	database
catalog	catalog name, always "def"
max_length	maximum width of field
length	width of field as specified in table definition
charsetnr	character set number for the field
flags	bit-flags for the field
type	data type used for the field
decimals	for integer fields; the number of decimals used

Example

The following code returns the next column in the result set, then print each field's name, table, and max length.


<?php/*  ja v  a 2  s.c  o  m*/
$con=mysqli_connect("localhost","my_user","my_password","my_db");

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

$sql="SELECT name FROM emp";

if ($result=mysqli_query($con,$sql)){
  // Get field information for all fields
  while ($fieldinfo=mysqli_fetch_field($result)){
     print $fieldinfo->name;
     print $fieldinfo->table;
     print $fieldinfo->max_length;
  }
  mysqli_free_result($result);
}

mysqli_close($con);
?>