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PHP Quiz PHP CertificatePHP mysqli_query() Function
Example
Perform queries against the database:
<?php
$con=mysqli_connect("localhost","my_user","my_password","my_db");
// Check connection
if (mysqli_connect_errno($con))
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
// Perform queries
mysqli_query($con,"SELECT * FROM Persons");
mysqli_query($con,"INSERT INTO Persons (FirstName,LastName,Age)
VALUES ('Glenn','Quagmire',33)");
mysqli_close($con);
?>
$con=mysqli_connect("localhost","my_user","my_password","my_db");
// Check connection
if (mysqli_connect_errno($con))
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
// Perform queries
mysqli_query($con,"SELECT * FROM Persons");
mysqli_query($con,"INSERT INTO Persons (FirstName,LastName,Age)
VALUES ('Glenn','Quagmire',33)");
mysqli_close($con);
?>
Definition and Usage
The mysqli_query() function performs a query against the database.
Syntax
mysqli_query(connection,query,resultmode);
| Parameter | Description |
|---|---|
| connection | Required. Specifies the MySQL connection to use |
| query | Required. Specifies the query string |
| resultmode |
Optional. A constant. Either:
|
Technical Details
| Return Value: | For successful SELECT, SHOW, DESCRIBE, or EXPLAIN queries it will return a mysqli_result object. For other successful queries it will return TRUE. FALSE on failure |
|---|---|
| PHP Version: | 5+ |
| Changelog: | PHP 5.3.0 added the ability for async queries |
PHP MySQLi Reference
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