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: Tips of the Day
To use the constant simply use its name:
Example:
if (EARTH_IS_FLAT) {
print "Earth is flat";
}
print APP_ENV_UPPERCASE;
Output:
or if you don't know the name of the constant in advance, use the constant function:
// this code is equivalent to the above code
$const1 = "EARTH_IS_FLAT";
$const2 = "APP_ENV_UPPERCASE";
if (constant($const1)) {
print "Earth is flat";
}
print constant($const2);
Output:
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