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PHP mysqli: init() function

mysqli_init() function / mysqli::init

The mysqli_init() function / mysqli::init -- mysqli_init initializes MySQLi and returns an object to use with the mysqli_real_connect() function.

Syntax:

Object oriented style

mysqli mysqli::init ( void )

Procedural style

mysqli mysqli_init ( void )

Usage: Procedural style

mmysqli_init();

Return value:

Returns an object.

Version: PHP 5, PHP 7

Example:

<?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
$sql1="CREATE TABLE orders LIKE employees";
mysqli_query($con,$sql1);
$sql2="INSERT INTO orders SELECT * FROM oldorders ORDER BY Last_Name LIMIT 10";
mysqli_query($con,$sql2);

// Print info about most recently executed query
echo mysqli_info($con); 

mysqli_close($con);
?>

See also

PHP Function Reference

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Next: insert_id



PHP: Tips of the Day

var_export(): var_export() dumps a PHP parseable representation of the item.

You can pass true as the second parameter to return the contents into a variable.

Example:

<?php
$myarray = [ "PHP", "Tips" ];
$mystring = "PHP Tips";
$myint = 28;

var_export($myarray);
var_export($mystring);
var_export($myint);
?>

Output:

array (
  0 => 'PHP',
  1 => 'Tips',
)'PHP Tips'28

To put the content into a variable, you can do this:

$array_export = var_export($myarray, true);
$string_export = var_export($mystring, true);
$int_export = var_export($myint, 1); // any `Truthy` value

After that, you can output it like this:

printf('$myarray = %s; %s', $array_export, PHP_EOL);
printf('$mystring = %s; %s', $string_export, PHP_EOL);
printf('$myint = %s; %s', $int_export, PHP_EOL);

Example:

<?php
$myarray = [ "PHP", "Tips" ];
$mystring = "PHP Tips";
$myint = 28;
$array_export = var_export($myarray, true);
$string_export = var_export($mystring, true);
$int_export = var_export($myint, 1);
printf('$myarray = %s; %s', $array_export, PHP_EOL);
printf('$mystring = %s; %s', $string_export, PHP_EOL);
printf('$myint = %s; %s', $int_export, PHP_EOL);
?>

This will produce the following output:

Output:

$myarray = array (
  0 => 'PHP',
  1 => 'Tips',
);
$mystring = 'PHP Tips';
$myint = 28;