mysqli_result::fetch_field

mysqli_fetch_field

(PHP 5, PHP 7)

mysqli_result::fetch_field -- mysqli_fetch_fieldReturns the next field in the result set

Descrierea

Stil obiect-orientat

mysqli_result::fetch_field ( void ) : object

Stil procedural

mysqli_fetch_field ( mysqli_result $result ) : object

Returns the definition of one column of a result set as an object. Call this function repeatedly to retrieve information about all columns in the result set.

Parametri

result

Numai stilul procedural: Un identificator al setului de rezultate întors de mysqli_query(), mysqli_store_result() sau mysqli_use_result ().

Valorile întoarse

Returns an object which contains field definition information or FALSE if no field information is available.

Object properties
Property Description
name The name of the column
orgname Original column name if an alias was specified
table The name of the table this field belongs to (if not calculated)
orgtable Original table name if an alias was specified
def Reserved for default value, currently always ""
db Database (since PHP 5.3.6)
catalog The catalog name, always "def" (since PHP 5.3.6)
max_length The maximum width of the field for the result set.
length The width of the field, as specified in the table definition.
charsetnr The character set number for the field.
flags An integer representing the bit-flags for the field.
type The data type used for this field
decimals The number of decimals used (for integer fields)

Exemple

Example #1 Stil obiect-orientat

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

/* check connection */
if (mysqli_connect_errno()) {
    
printf("Connect failed: %s\n"mysqli_connect_error());
    exit();
}

$query "SELECT Name, SurfaceArea from Country ORDER BY Code LIMIT 5";

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

    
/* Get field information for all columns */
    
while ($finfo $result->fetch_field()) {

        
printf("Name:     %s\n"$finfo->name);
        
printf("Table:    %s\n"$finfo->table);
        
printf("max. Len: %d\n"$finfo->max_length);
        
printf("Flags:    %d\n"$finfo->flags);
        
printf("Type:     %d\n\n"$finfo->type);
    }
    
$result->close();
}

/* close connection */
$mysqli->close();
?>

Example #2 Stil procedural

<?php
$link 
mysqli_connect("localhost""my_user""my_password""world");

/* check connection */
if (mysqli_connect_errno()) {
    
printf("Connect failed: %s\n"mysqli_connect_error());
    exit();
}

$query "SELECT Name, SurfaceArea from Country ORDER BY Code LIMIT 5";

if (
$result mysqli_query($link$query)) {

    
/* Get field information for all fields */
    
while ($finfo mysqli_fetch_field($result)) {

        
printf("Name:     %s\n"$finfo->name);
        
printf("Table:    %s\n"$finfo->table);
        
printf("max. Len: %d\n"$finfo->max_length);
        
printf("Flags:    %d\n"$finfo->flags);
        
printf("Type:     %d\n\n"$finfo->type);
    }
    
mysqli_free_result($result);
}

/* close connection */
mysqli_close($link);
?>

Exemplele de mai sus vor afișa:

Name:     Name
Table:    Country
max. Len: 11
Flags:    1
Type:     254

Name:     SurfaceArea
Table:    Country
max. Len: 10
Flags:    32769
Type:     4

A se vedea și