PHP mysqli_fetch_fields() Function
Definition
The mysqli_fetch_fields() function returns an array of objects that represent the columns in a result set.
Syntax
mysqli_fetch_fields(result);Parameter
| Parameter | Is Required | Description |
|---|---|---|
| result | Required. | Resultset returned by mysqli_query(), mysqli_store_result() or mysqli_use_result() |
Return
It returns an array of objects containing column definition information or FALSE if no info is available.
The returning objects have 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) |
| 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 return an array of objects that represent the columns in a result set, then print each field's name, table, and max length.
<?php//w w w.j a v a2s . co 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
$fieldinfo=mysqli_fetch_fields($result);
foreach ($fieldinfo as $val){
printf("Name: %s\n",$val->name);
printf("Table: %s\n",$val->table);
printf("max. Len: %d\n",$val->max_length);
}
mysqli_free_result($result);
}
mysqli_close($con);
?>