PHP Manual


(PHP 4 >= 4.2.0, PHP 5)

pg_field_prtlen — Returns the printed length


int pg_field_prtlen ( resource $result , int $row_number , mixed $field_name_or_number )
int pg_field_prtlen ( resource $result , mixed $field_name_or_number )

pg_field_prtlen() returns the actual printed length (number of characters) of a specific value in a PostgreSQL result . Row numbering starts at 0. This function will return -1 on an error.

field_name_or_number can be passed either as an integer or as a string. If it is passed as an integer, PHP recognises it as the field number, otherwise as field name.

See the example given at the pg_field_name() page.

Note: This function used to be called pg_fieldprtlen().



PostgreSQL query result resource, returned by pg_query(), pg_query_params() or pg_execute() (among others).


Row number in result. Rows are numbered from 0 upwards. If omitted, current row is fetched.

Return Values

The field printed length, or FALSE on error.


Example#1 Getting information about fields

pg_connect("dbname=publisher") or die("Could not connect");

$res pg_query($dbconn"select * from authors where author = 'Orwell'");
$i pg_num_fields($res);
  for (
$j 0$j $i$j++) {
"column $j\n";
$fieldname pg_field_name($res$j);
"fieldname: $fieldname\n";
"printed length: " pg_field_prtlen($res$fieldname) . " characters\n";
"storage length: " pg_field_size($res$j) . " bytes\n";
"field type: " pg_field_type($res$j) . " \n\n";

The above example will output:

column 0 fieldname: author printed length: 6 characters storage length: -1 bytes field type: varchar column 1 fieldname: year printed length: 4 characters storage length: 2 bytes field type: int2 column 2 fieldname: title printed length: 24 characters storage length: -1 bytes field type: varchar

See Also

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