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Top Forums Shell Programming and Scripting Need help on bind param function in perl Post 302492973 by vanitham on Wednesday 2nd of February 2011 03:48:42 AM
Old 02-02-2011
Need help on bind param function in perl

Hi,

I want to know what exactly bind paameter does?

what exactly bind_param( 1, $siteName ) means?

what 1 means?

In some examples the bind_param is set like this:

Code:
bind_param( 2, $siteName1 )
bind_param( 3, $siteName2 )

Code:
$sth = $dbh->prepare( "
            SELECT name, location
            FROM megaliths
            WHERE name = ?
        " );
$sth->bind_param( 1, $siteName );

I tired in google but some how i did not get clear picture.

Help is very much appreciated

Regards
Vanitha
 

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PDOSTATEMENT.BINDVALUE(3)						 1						 PDOSTATEMENT.BINDVALUE(3)

PDOStatement::bindValue - Binds a value to a parameter

SYNOPSIS
public bool PDOStatement::bindValue (mixed $parameter, mixed $value, [int $data_type = PDO::PARAM_STR]) DESCRIPTION
Binds a value to a corresponding named or question mark placeholder in the SQL statement that was used to prepare the statement. PARAMETERS
o $parameter - Parameter identifier. For a prepared statement using named placeholders, this will be a parameter name of the form $:name. For a prepared statement using question mark placeholders, this will be the 1-indexed position of the parameter. o $value - The value to bind to the parameter. o $data_type - Explicit data type for the parameter using the PDO::PARAM_* constants. RETURN VALUES
Returns TRUE on success or FALSE on failure. EXAMPLES
Example #1 Execute a prepared statement with named placeholders <?php /* Execute a prepared statement by binding PHP variables */ $calories = 150; $colour = 'red'; $sth = $dbh->prepare('SELECT name, colour, calories FROM fruit WHERE calories < :calories AND colour = :colour'); $sth->bindValue(':calories', $calories, PDO::PARAM_INT); $sth->bindValue(':colour', $colour, PDO::PARAM_STR); $sth->execute(); ?> Example #2 Execute a prepared statement with question mark placeholders <?php /* Execute a prepared statement by binding PHP variables */ $calories = 150; $colour = 'red'; $sth = $dbh->prepare('SELECT name, colour, calories FROM fruit WHERE calories < ? AND colour = ?'); $sth->bindValue(1, $calories, PDO::PARAM_INT); $sth->bindValue(2, $colour, PDO::PARAM_STR); $sth->execute(); ?> SEE ALSO
PDO.prepare(3), PDOStatement.execute(3), PDOStatement.bindParam(3). PHP Documentation Group PDOSTATEMENT.BINDVALUE(3)
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