PHP mysqli_fetch_field() Function
PHP MySQLi Reference
Example
Return the next field (column) in the result set, then print each field's
name, table, and max length:
<?php
$con=mysqli_connect("localhost","my_user","my_password","my_db");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$sql="SELECT Lastname,Age FROM Persons ORDER BY Lastname";
if ($result=mysqli_query($con,$sql))
{
// Get field
information for all fields
while
($fieldinfo=mysqli_fetch_field($result))
{
printf("Name: %s\n",$fieldinfo->name);
printf("Table:
%s\n",$fieldinfo->table);
printf("max. Len:
%d\n",$fieldinfo->max_length);
}
// Free result
set
mysqli_free_result($result);
}
mysqli_close($con);
?>
Definition and Usage
The mysqli_fetch_field() function returns the next field (column) in the result set, as an object.
Syntax
mysqli_fetch_field(result);
Parameter |
Description |
result |
Required. Specifies a result set identifier returned by mysqli_query(),
mysqli_store_result() or mysqli_use_result() |
Technical Details
Return Value: |
Returns an object containing field definition information.
FALSE if no info is available. The object has the following properties:
- name - name of the column
- orgname - original column name (if an alias is specified)
- table - name of table
- orgtable - original table name (if an alias is specified)
- def - reserved for default values, currently always ""
- db - database (new in PHP 5.3.6)
- catalog - catalog name, always "def" (since PHP 5.3.6)
- 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
|
PHP Version: |
5+ |
PHP MySQLi Reference
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