12-05-2005
Well I'm still not convinced it's because the query's returning nothing. It sounds more like it's returning something the query can't handle, but why not try putting quotes around the variable in the test, ie:-
if [ "$v_flag" ]
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=================================
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LEARN ABOUT PHP
pdo.query
PDO.QUERY(3) 1 PDO.QUERY(3)
PDO
::query - Executes an SQL statement, returning a result set as a PDOStatement object
SYNOPSIS
public PDOStatement PDO::query (string $statement)
DESCRIPTION
PDOStatement PDO::query (string $statement, int $PDO::FETCH_COLUMN, int $colno) PDOStatement PDO::query (string $statement, int
$PDO::FETCH_CLASS, string $classname, array $ctorargs) PDOStatement PDO::query (string $statement, int $PDO::FETCH_INTO, object
$object)
PDO.query(3) executes an SQL statement in a single function call, returning the result set (if any) returned by the statement as a
PDOStatement object.
For a query that you need to issue multiple times, you will realize better performance if you prepare a PDOStatement object using PDO.pre-
pare(3) and issue the statement with multiple calls to PDOStatement.execute(3).
If you do not fetch all of the data in a result set before issuing your next call to PDO.query(3), your call may fail. Call PDOState-
ment.closeCursor(3) to release the database resources associated with the PDOStatement object before issuing your next call to
PDO.query(3).
Note
Although this function is only documented as having a single parameter, you may pass additional arguments to this function. They
will be treated as though you called PDOStatement.setFetchMode(3) on the resultant statement object.
PARAMETERS
o $statement
- The SQL statement to prepare and execute. Data inside the query should be properly escaped.
RETURN VALUES
PDO.query(3) returns a PDOStatement object, or FALSE on failure.
EXAMPLES
Example #1
Demonstrate PDO::query
A nice feature of PDO.query(3) is that it enables you to iterate over the rowset returned by a successfully executed SELECT state-
ment.
<?php
function getFruit($conn) {
$sql = 'SELECT name, color, calories FROM fruit ORDER BY name';
foreach ($conn->query($sql) as $row) {
print $row['name'] . " ";
print $row['color'] . " ";
print $row['calories'] . "
";
}
}
?>
The above example will output:
apple red 150
banana yellow 250
kiwi brown 75
lemon yellow 25
orange orange 300
pear green 150
watermelon pink 90
SEE ALSO
PDO.exec(3), PDO.prepare(3), PDOStatement.execute(3).
PHP Documentation Group PDO.QUERY(3)