pg_result_error_field()

(PHP 5 >= 5.1.0, PHP 7)

Returns an individual field of an error report

说明

pg_result_error_field(resource $result,int $fieldcode): string

pg_result_error_field() returns one of the detailed error message fields associated with$resultresource. It is only available against a PostgreSQL 7.4 or above server. The error field is specified by the$fieldcode.

Because pg_query() and pg_query_params() return FALSE if the query fails, you must use pg_send_query() and pg_get_result() to get the result handle.

If you need to get additional error information from failed pg_query() queries, use pg_set_error_verbosity() and pg_last_error() and then parse the result.

参数

$result: A PostgreSQL query result resource from a previously executed statement.
$fieldcode: Possible$fieldcodevalues are:PGSQL_DIAG_SEVERITY,PGSQL_DIAG_SQLSTATE,PGSQL_DIAG_MESSAGE_PRIMARY,PGSQL_DIAG_MESSAGE_DETAIL,PGSQL_DIAG_MESSAGE_HINT,PGSQL_DIAG_STATEMENT_POSITION,PGSQL_DIAG_INTERNAL_POSITION(PostgreSQL 8.0+ only),PGSQL_DIAG_INTERNAL_QUERY(PostgreSQL 8.0+ only),PGSQL_DIAG_CONTEXT,PGSQL_DIAG_SOURCE_FILE,PGSQL_DIAG_SOURCE_LINE or PGSQL_DIAG_SOURCE_FUNCTION.

返回值

A string containing the contents of the error field,NULL if the field does not exist or FALSE on failure.

范例

Example #1 pg_result_error_field() example

<?php
  $dbconn = pg_connect("dbname=publisher") or die("Could not connect");
  if (!pg_connection_busy($dbconn)) {
      pg_send_query($dbconn, "select * from doesnotexist;");
  }
  
  $res1 = pg_get_result($dbconn);
  echo pg_result_error_field($res1, PGSQL_DIAG_SQLSTATE);
?>

参见

pg_result_error()获得查询结果的错误信息