cubrid_query() 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
.
An SQL query
Data inside the query should be properly escaped.
The CUBRID connection. If the connection identifier is not specified, the last connection opened by cubrid_connect() is assumed.
For SELECT, SHOW, DESCRIBE, EXPLAIN and other statements returning resultset, cubrid_query() returns a resource on success, or FALSE
on error.
For other type of SQL statements, INSERT, UPDATE, DELETE, DROP, etc, cubrid_query() returns TRUE
on success or FALSE
on error.
The returned result resource should be passed to cubrid_fetch_array(), and other functions for dealing with result tables, to access the returned data.
Use cubrid_num_rows() to find out how many rows were returned for a SELECT statement or cubrid_affected_rows() to find out how many rows were affected by a DELETE, INSERT, REPLACE, or UPDATE statement.
cubrid_query() will also fail and return FALSE
if the user does not have permission to access the table(s) referenced by the query.
The following query is syntactically invalid, so cubrid_query() 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()); } ?>
The following query is valid, so cubrid_query() 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() . "\n"; $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); ?>
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