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  • 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

    上篇:pg_query()

    下篇:pg_result_error()