IT. Expert System.

PHP

Returns the number of columns in the result set


PDOStatement::columnCount

(PHP 5 >= 5.1.0, PECL pdo >= 0.2.0)

PDOStatement::columnCount Returns the number of columns in the result set

Description

int PDOStatement::columnCount ( void )

Use PDOStatement::columnCount() to return the number of columns in the result set represented by the PDOStatement object.

If the PDOStatement object was returned from PDO::query(), the column count is immediately available.

If the PDOStatement object was returned from PDO::prepare(), an accurate column count will not be available until you invoke PDOStatement::execute().

Return Values

Returns the number of columns in the result set represented by the PDOStatement object. If there is no result set, PDOStatement::columnCount() returns 0.

Examples

Example #1 Counting columns

This example demonstrates how PDOStatement::columnCount() operates with and without a result set.

<?php
$dbh 
= new PDO('odbc:sample''db2inst1''ibmdb2');

$sth $dbh->prepare("SELECT name, colour FROM fruit");

/* Count the number of columns in the (non-existent) result set */
$colcount $sth->columnCount();
print(
"Before execute(), result set has $colcount columns (should be 0)\n");

$sth->execute();

/* Count the number of columns in the result set */
$colcount $sth->columnCount();
print(
"After execute(), result set has $colcount columns (should be 2)\n");

?>

The above example will output:

 Before execute(), result set has 0 columns (should be 0) After execute(), result set has 2 columns (should be 2) 

See Also



Content

Android Reference

Java basics

Java Enterprise Edition (EE)

Java Standard Edition (SE)

SQL

HTML

PHP

CSS

Java Script

MYSQL

JQUERY

VBS

REGEX

C

C++

C#

Design patterns

RFC (standard status)

RFC (proposed standard status)

RFC (draft standard status)

RFC (informational status)

RFC (experimental status)

RFC (best current practice status)

RFC (historic status)

RFC (unknown status)

IT dictionary

License.
All information of this service is derived from the free sources and is provided solely in the form of quotations. This service provides information and interfaces solely for the familiarization (not ownership) and under the "as is" condition.
Copyright 2016 © ELTASK.COM. All rights reserved.
Site is optimized for mobile devices.
Downloads: 1500 / 96489999. Delta: 0.03723 с