Manipulating the table in PHP

 Manipulating the table in PHP 

(Insert Data Into MySQL Using MySQLi)

After a database and a table have been created, start adding data to them.

For this syntax rules to follow:

• The SQL query must be quoted in PHP
• String values inside the SQL query must be quoted
• Numeric values must not be quoted
• The word NULL must not be quoted

 The INSERT INTO statement is used to add new records to a MySQL table:

INSERT INTO table_name (column1, column2, column3,...) VALUES (value1, value2, value3,...)

created an empty table named "MyGuests" with five columns: "id", "firstname", "lastname", "email" and "reg_date".

 Examples :  add a new record to the "MyGuests" table:

Example (MySQLi Procedural)

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

// Create connection
$conn = mysqli_connect($servername, $username, $password, $dbname);
// Check connection
if (!$conn) {
  die("Connection failed: " . mysqli_connect_error());
}

$sql = "INSERT INTO MyGuests (firstname, lastname, email)
VALUES ('John', 'Doe', 'john@example.com')";

if (mysqli_query($conn, $sql)) {
  echo "New record created successfully";
} else {
  echo "Error: " . $sql . "<br>" . mysqli_error($conn);
}

mysqli_close($conn);
?>

 Insert Multiple Records Into MySQL

Multiple SQL statements must be executed with the mysqli_multi_query() function.

mysqli_multi_query() function

The multi_query() / mysqli_multi_query() function performs one or more queries against the database. The queries are separated with a semicolon.

Syntax

Object oriented style: $mysqli -> multi_query(query)

Procedural style: mysqli_multi_query(connection, query)

 Examples :- add three new records to the "MyGuests" table:

Example (MySQLi Procedural)

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

// Create connection
$conn = mysqli_connect($servername, $username, $password, $dbname);
// Check connection
if (!$conn) {
  die("Connection failed: " . mysqli_connect_error());
}

$sql = "INSERT INTO MyGuests (firstname, lastname, email)
VALUES ('John', 'Doe', 'john@example.com');";
$sql .= "INSERT INTO MyGuests (firstname, lastname, email)
VALUES ('Mary', 'Moe', 'mary@example.com');";
$sql .= "INSERT INTO MyGuests (firstname, lastname, email)
VALUES ('Julie', 'Dooley', 'julie@example.com')";

if (mysqli_multi_query($conn, $sql)) {
  echo "New records created successfully";
} else {
  echo "Error: " . $sql . "<br>" . mysqli_error($conn);
}

mysqli_close($conn);
?>

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