PDOStatement->columnCount
(PHP 5 >= 5.1.0, PECL pdo:0.2-1.0.3)
PDOStatement->columnCount —
Returns the number of columns in the result set
Description
int PDOStatement::columnCount
( void
)
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");
$colcount = $sth->columnCount();
print("Before execute(), result set has $colcount columns (should be 0)\n");
$sth->execute();
$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)
PDOStatement->closeCursor
