CUBRID_QUERY(3) 1 CUBRID_QUERY(3)
cubrid_query - Send a CUBRID query
SYNOPSIS
resource cubrid_query (string $query, [resource $conn_identifier])
DESCRIPTION
cubrid_query(3) sends a unique query (multiple queries are not supported) to the currently active database on the server that's associated
with the specified $conn_identifier.
PARAMETERS
o $query
- An SQL query Data inside the query should be properly escaped.
o $conn_identifier
- The CUBRID connection. If the connection identifier is not specified, the last connection opened by cubrid_connect(3) is
assumed.
RETURN VALUES
For SELECT, SHOW, DESCRIBE, EXPLAIN and other statements returning resultset, cubrid_query(3) returns a resource on success, or FALSE on
error.
For other type of SQL statements, INSERT, UPDATE, DELETE, DROP, etc, cubrid_query(3) returns TRUE on success or FALSE on error.
The returned result resource should be passed to cubrid_fetch_array(3), and other functions for dealing with result tables, to access the
returned data.
Use cubrid_num_rows(3) to find out how many rows were returned for a SELECT statement or cubrid_affected_rows(3) to find out how many rows
were affected by a DELETE, INSERT, REPLACE, or UPDATE statement.
cubrid_query(3) will also fail and return FALSE if the user does not have permission to access the table(s) referenced by the query.
EXAMPLES
Example #1
Invalid Query
The following query is syntactically invalid, so cubrid_query(3) fails and returns FALSE.
<?php
$conn = cubrid_connect('localhost', 33000, 'demodb');
$result = cubrid_query('SELECT * WHERE 1=1');
if (!$result) {
die('Invalid query: ' . cubrid_error());
}
?>
Example #2
Valid Query
The following query is valid, so cubrid_query(3) returns a resource.
<?php
// This could be supplied by a user, for example
$firstname = 'fred';
$lastname = 'fox';
$conn = cubrid_connect('localhost', 33000, 'demodb');
cubrid_execute($conn,"DROP TABLE if exists friends");
cubrid_execute($conn,"create table friends(firstname varchar,lastname varchar,address char(24),age int)");
cubrid_execute($conn,"insert into friends values('fred','fox','home-1','20')");
cubrid_execute($conn,"insert into friends values('blue','cat','home-2','21')");
// Formulate Query
// This is the best way to perform an SQL query
// For more examples, see cubrid_real_escape_string()
$query = sprintf("SELECT firstname, lastname, address, age FROM friends WHERE firstname='%s' AND lastname='%s'",
cubrid_real_escape_string($firstname),
cubrid_real_escape_string($lastname));
// Perform Query
$result = cubrid_query($query);
// Check result
// This shows the actual query sent to CUBRID, and the error. Useful for debugging.
if (!$result) {
$message = 'Invalid query: ' . cubrid_error() . "
";
$message .= 'Whole query: ' . $query;
die($message);
}
// Use result
// Attempting to print $result won't allow access to information in the resource
// One of the cubrid result functions must be used
// See also cubrid_result(), cubrid_fetch_array(), cubrid_fetch_row(), etc.
while ($row = cubrid_fetch_assoc($result)) {
echo $row['firstname'];
echo $row['lastname'];
echo $row['address'];
echo $row['age'];
}
// Free the resources associated with the result set
// This is done automatically at the end of the script
cubrid_free_result($result);
?>
SEE ALSO
cubrid_connect(3), cubrid_error(3), cubrid_real_escape_string(3), cubrid_result(3), cubrid_fetch_assoc(3), cubrid_unbuffered_query(3).
PHP Documentation Group CUBRID_QUERY(3)