PHP 7.1.0 Released

PDOStatement::columnCount

(PHP 5 >= 5.1.0, PHP 7, PECL pdo >= 0.2.0)

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

Description

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().

Return Values

Returns the number of columns in the result set represented by the PDOStatement object, even if the result set is empty. 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

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User Contributed Notes 1 note

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756567406 at qq dot com
1 day ago
When you use query method, You'll get count right away

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

$sth = $dbh->query("SELECT name, colour FROM fruit");
$count = $sth->columnCount();

echo
'query count is '.$count;

?>
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