PHP 5.4.33 Released

PDOStatement::columnCount

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

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

Descrierea

public 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().

Valorile întoarse

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

Exemple

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");

?>

Exemplul de mai sus va afișa:

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

Vedeți de asemenea

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