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PHP mysqli_query() Function

❮ PHP MySQLi Reference

Example

Perform queries against the database:

<?php
$con=mysqli_connect("localhost","my_user","my_password","my_db");
// Check connection
if (mysqli_connect_errno())
  {
  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:

  • MYSQLI_USE_RESULT (Use this if we have to retrieve large amount of data)
  • MYSQLI_STORE_RESULT (This is default)

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