01-31-2013
Replace a field with a character as per the field length
Hi all,
I have a requirement to replace a field with a character as per the length of the field.
Suppose i have a file where second field is of 20 character length. I want to replace second field with 20 stars (*). like ********************
As the field is not a fixed one, i want to do the replacement according to the field length(i.e. length($2) or $3 ....).
please help me to get the solution.
Thanks in adv.
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LEARN ABOUT PHP
pg_field_name
PG_FIELD_NAME(3) PG_FIELD_NAME(3)
pg_field_name - Returns the name of a field
SYNOPSIS
string pg_field_name (resource $result, int $field_number)
DESCRIPTION
pg_field_name(3) returns the name of the field occupying the given $field_number in the given PostgreSQL $result resource. Field numbering
starts from 0.
Note
This function used to be called pg_fieldname(3).
PARAMETERS
o $result
- PostgreSQL query result resource, returned by pg_query(3), pg_query_params(3) or pg_execute(3) (among others).
o $field_number
- Field number, starting from 0.
RETURN VALUES
The field name, 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
";
$fieldname = pg_field_name($res, $j);
echo "fieldname: $fieldname
";
echo "printed length: " . pg_field_prtlen($res, $fieldname) . " characters
";
echo "storage length: " . pg_field_size($res, $j) . " bytes
";
echo "field type: " . pg_field_type($res, $j) . "
";
}
?>
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
pg_field_num(3).
PHP Documentation Group PG_FIELD_NAME(3)