PHP Unconference Europe 2015

maxdb_fetch_field

maxdb_result::fetch_field

(PECL maxdb >= 1.0)

maxdb_fetch_field -- maxdb_result::fetch_fieldReturns the next field in the result set

Beschreibung

Prozeduraler Stil

mixed maxdb_fetch_field ( resource $result )

Objektorientierter Stil

mixed maxdb_result::fetch_field ( void )

The maxdb_fetch_field() returns the definition of one column of a result set as an resource. Call this function repeatedly to retrieve information about all columns in the result set. maxdb_fetch_field() returns FALSE when no more fields are left.

Rückgabewerte

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

Object properties
Property Description
name The name of the column
max_length The maximum width of the field for the result set.
type The data type used for this field
decimals The number of decimals used (for integer fields)

Beispiele

Beispiel #1 Objektorientierter Stil

<?php
$maxdb 
= new maxdb("localhost""MONA""RED""DEMODB");

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

$query "SELECT name, cno from hotel.customer ORDER BY cno";

if (
$result $maxdb->query($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 */
$maxdb->close();
?>

Beispiel #2 Prozeduraler Stil

<?php
$link 
maxdb_connect("localhost""MONA""RED""DEMODB");

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

$query "SELECT name, cno from hotel.customer ORDER BY cno";

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

   
/* Get field information for all fields */
   
while ($finfo maxdb_fetch_field($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);
   }
   
maxdb_free_result($result);
}

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

Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

Name:     NAME
Table:
max. Len: 10
Flags:    -1
Type:     2

Name:     CNO
Table:
max. Len: 4
Flags:    -1
Type:     0

Siehe auch

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