Php/docs/function.pg-field-prtlen
pg_field_prtlen
(PHP 4 >= 4.2.0, PHP 5, PHP 7)
pg_field_prtlen — Returns the printed length
Description
pg_field_prtlen
( resource $result
, int $row_number
, mixed $field_name_or_number
) : int
pg_field_prtlen
( resource $result
, mixed $field_name_or_number
) : int
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 FALSE on an error.
field_name_or_number can be passed either as an
int or as a string. If it is passed as an
int, 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().
Parameters
result- PostgreSQL query result resource, returned by pg_query(), pg_query_params() or pg_execute() (among others).
row- 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.
Examples
Example #1 Getting information about fields
<?php $dbconn = 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++) { echo "column $j\n"; $fieldname = pg_field_name($res, $j); echo "fieldname: $fieldname\n"; echo "printed length: " . pg_field_prtlen($res, $fieldname) . " characters\n"; echo "storage length: " . pg_field_size($res, $j) . " bytes\n"; echo "field type: " . pg_field_type($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
