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pg_field_prtlen

Returns the printed length (PHP 4 >= 4.2.0, PHP 5)
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().

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 1929. 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