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Document database handle error methods.
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@173554 c90b9560-bf6c-de11-be94-00142212c4b1
This commit is contained in:
Dan Scott
parent
492aea4f11
commit
017be95eee
2 changed files with 141 additions and 4 deletions
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<?xml version='1.0' encoding='iso-8859-1'?>
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<!-- $Revision: 1.1 $ -->
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<!-- $Revision: 1.2 $ -->
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<!-- Generated by xml_proto.php v2.1. Found in /scripts directory of phpdoc. -->
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<refentry id="function.PDO-errorCode">
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<refnamediv>
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<void/>
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</methodsynopsis>
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&warn.undocumented.func;
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&warn.experimental.func;
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<para>
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Returns an integer value that maps to the generic error categories
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defined in the <literal>PDO_ERR_*</literal> set of constants.
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</para>
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<para>
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<function>PDO::errorCode</function> only retrieves error codes for operations
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performed directly on the database handle. If you create a PDOStatement
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object through <function>PDO::prepare</function> or
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<function>PDO::query</function> and invoke an error on the statement
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handle, <function>PDO::errorCode</function> will return
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<literal>PDO_ERR_NONE</literal>. You must call
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<function>PDOStatement::errorCode</function> to return the error
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code for an operation performed on a particular statement handle.
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</para>
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<example><title>Determining which category of error occurred</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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/* Provoke an error -- the BONES table does not exist */
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$dbh->exec("INSERT INTO bones(skull) VALUES ('reagan')");
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echo "\nPDO::errorCode(): ";
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switch ($dbh->errorCode()) {
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case PDO_ERR_NONE:
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echo "No error!\n";
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break;
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case PDO_ERR_CANT_MAP:
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echo "Error: Unable to map data types between database and PHP.\n";
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break;
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case PDO_ERR_SYNTAX:
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echo "Error: incorrect syntax\n";
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break;
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case PDO_ERR_CONSTRAINT:
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echo "Error: The request would violate a constraint.\n";
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break;
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case PDO_ERR_NOT_FOUND:
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echo "Error: The object could not be found.\n";
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break;
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case PDO_ERR_ALREADY_EXISTS:
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echo "Error: The object already exists.\n";
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break;
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case PDO_ERR_NOT_IMPLEMENTED:
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echo "Error: The requested function is not implemented.\n";
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break;
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case PDO_ERR_MISMATCH:
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echo "Error: mismatch\n";
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break;
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case PDO_ERR_TRUNCATED:
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echo "Error: The value was truncated because the input value was longer
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than the maximum column length.\n";
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break;
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case PDO_ERR_DISCONNECTED:
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echo "Error: The connection to the requested database has been closed.\n";
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break;
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}
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?>
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]]>
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</programlisting>
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</example>
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&example.outputs;
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<screen>
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<![CDATA[
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PDO::errorCode(): Error: The object could not be found.
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]]>
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</screen>
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</refsect1>
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</refentry>
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<?xml version='1.0' encoding='iso-8859-1'?>
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<!-- $Revision: 1.2 $ -->
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<!-- $Revision: 1.3 $ -->
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<!-- Generated by xml_proto.php v2.1. Found in /scripts directory of phpdoc. -->
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<refentry id="function.PDO-errorInfo">
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<refnamediv>
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<void/>
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</methodsynopsis>
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&warn.undocumented.func;
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&warn.experimental.func;
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<para>
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<function>PDO::errorInfo</function> returns an array of error information
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about the last operation performed by this database handle. The array
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consists of the following fields:
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<informaltable>
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<tgroup cols='2'>
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<thead>
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<row>
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<entry>Element</entry>
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<entry>Information</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry>0</entry>
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<entry>Generic PDO error code corresponding to one of the
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<literal>PDO_ERR_*</literal> constants.</entry>
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</row>
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<row>
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<entry>1</entry>
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<entry>Driver-specific error code.</entry>
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</row>
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<row>
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<entry>2</entry>
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<entry>Driver-specific error message.</entry>
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</row>
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</tbody>
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</tgroup>
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</informaltable>
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</para>
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<para>
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<function>PDO::errorInfo</function> only retrieves error information
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for operations performed directly on the database handle. If you create
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a PDOStatement object through <function>PDO::prepare</function> or
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<function>PDO::query</function> and invoke an error on the statement
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handle, <function>PDO::errorInfo</function> will insert an error code
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of <literal>PDO_ERR_NONE</literal> into the first element of the returned
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array. You must call <function>PDOStatement::errorInfo</function> to
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return the error information for an operation performed on a particular
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statement handle.
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</para>
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<example><title>Displaying errorInfo() fields for a PDO_ODBC connection to a DB2 database</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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/* Provoke an error -- the BONES table does not exist */
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$dbh->exec("INSERT INTO bones(skull) VALUES ('reagan')");
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$arr = $dbh->errorInfo();
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if ($arr[0] == PDO_ERR_NOT_FOUND) {
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echo "Error: a requested database object does not exist.\n";
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printf("Driver-specific error code: %d\n", $arr[1]);
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printf("Driver-specific message: [%s]\n", $arr[2]);
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}
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?>
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]]>
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</programlisting>
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</example>
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&example.outputs;
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<screen>
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<![CDATA[
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Error: a requested database object does not exist.
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Driver-specific error code: -204
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Driver-specific message: [SQLExecute: -204 [IBM][CLI Driver][DB2/NT]
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SQL0204N "DB2INST1.BONES" is an undefined name. SQLSTATE=42704
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[SQL State 42S02] (..\pecl\pdo_odbc\odbc_stmt.c:80)]
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]]>
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</screen>
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</refsect1>
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</refentry>
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