PHP mysqli_fetch_field() Function
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//ww w . j a va 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);
?>