reference/pdo/pdostatement/columncount.xml
28529d3539b850e870e3aa97570f4db0e53daa03
28529d3539b850e870e3aa97570f4db0e53daa03
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@@ -9,42 +9,52 @@
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<methodsynopsis role="PDOStatement">
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<modifier>public</modifier> <type>int</type><methodname>PDOStatement::columnCount</methodname>
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<void/>
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</methodsynopsis>
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<para>
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Use <function>PDOStatement::columnCount</function> to return the number
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Use <methodname>PDOStatement::columnCount</methodname> to return the number
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of columns in the result set represented by the PDOStatement object.
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</para>
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<para>
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If the PDOStatement object was returned from <function>PDO::query</function>,
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If the PDOStatement object was returned from <methodname>PDO::query</methodname>,
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the column count is immediately available.
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</para>
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<para>
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If the PDOStatement object was returned from
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<function>PDO::prepare</function>, an accurate column count will not be
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available until you invoke <function>PDOStatement::execute</function>.
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<methodname>PDO::prepare</methodname>, an accurate column count will not be
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available until you invoke <methodname>PDOStatement::execute</methodname>.
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</para>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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&no.function.parameters;
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<para>
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Returns the number of columns in the result set represented by the
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PDOStatement object, even if the result set is empty. If there is no result set,
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<function>PDOStatement::columnCount</function> returns <literal>0</literal>.
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<methodname>PDOStatement::columnCount</methodname> returns <literal>0</literal>.
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</para>
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</refsect1>
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<refsect1 role="errors">
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&reftitle.errors;
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&pdo.errors;
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</refsect1>
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<refsect1 role="examples">
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&reftitle.examples;
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<para>
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<example>
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<title>Counting columns</title>
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<para>
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This example demonstrates how <function>PDOStatement::columnCount</function>
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This example demonstrates how <methodname>PDOStatement::columnCount</methodname>
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operates with and without a result set.
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</para>
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<programlisting role="php">
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@@ -56,13 +66,13 @@ $sth = $dbh->prepare("SELECT name, colour FROM fruit");
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/* Count the number of columns in the (non-existent) result set */
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$colcount = $sth->columnCount();
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print("Before execute(), result set has $colcount columns (should be 0)\n");
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print "Before execute(), result set has $colcount columns (should be 0)\n";
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$sth->execute();
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/* Count the number of columns in the result set */
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$colcount = $sth->columnCount();
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print("After execute(), result set has $colcount columns (should be 2)\n");
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print "After execute(), result set has $colcount columns (should be 2)\n";
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?>
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]]>
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@@ -83,15 +93,14 @@ After execute(), result set has 2 columns (should be 2)
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&reftitle.seealso;
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<para>
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<simplelist>
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<member><function>PDO::prepare</function></member>
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<member><function>PDOStatement::execute</function></member>
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<member><function>PDOStatement::rowCount</function></member>
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<member><methodname>PDO::prepare</methodname></member>
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<member><methodname>PDOStatement::execute</methodname></member>
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<member><methodname>PDOStatement::rowCount</methodname></member>
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</simplelist>
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</para>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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