pg_field_prtlen

pg_field_prtlen

Returns the printed length

int **pg_field_prtlen** PgSql\Result $result  $row mixed $field_name_or_number

int **pg_field_prtlen** PgSql\Result $result mixed $field_name_or_number

returns the actual printed

length (number of characters) of a specific value in a PostgreSQL . Row numbering starts at 0. This function will return false on an error. pg_field_prtlen``result

can be passed either as an
or as a . If it is passed as an

, PHP recognises it as the field number, otherwise as field name. field_name_or_number``int``string``int

See the example given at the page. pg_field_name

Opmerking: > This function used to be called . pg_fieldprtlen

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

The field printed length.

Voorbeeld: 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";
  }
?>

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

pg_field_size