PHP mysqli ssl_set() Method

The PHP mysqli::ssl_set() / mysqli_ssl_set() function is used for establishing secure connections using SSL. It must be called before mysqli_real_connect(). This function does nothing unless OpenSSL support is enabled.

Syntax

//Object-oriented style
public mysqli::ssl_set(key, certificate, ca_certificate, 
                       ca_path, cipher_algos)

//Procedural style
mysqli_ssl_set(mysql, key, certificate, 
               ca_certificate, ca_path, cipher_algos)

Parameters

`mysql`	`Required.` For procedural style only: Specify a mysqli object returned by mysqli_connect() or mysqli_init().
`key`	`Required.` Specify the path name to the key file.
`certificate`	`Required.` Specify the path name to the certificate file.
`ca_certificate`	`Required.` Specify the path name to the certificate authority file.
`ca_path`	`Required.` Specify the pathname to a directory that contains trusted SSL CA certificates in PEM format.
`cipher_algos`	`Required.` Specify a list of allowable ciphers to use for SSL encryption.

Return Value

Always returns true value. If SSL setup is incorrect mysqli_real_connect() will return an error when trying to connect.

Example: Object-oriented style

The example below shows the usage of mysqli::ssl_set() method.

<?php
$mysqli = mysqli_init();
if (!$mysqli) {
  die('mysqli_init failed');
}

$mysqli -> ssl_set("key.pem", "cert.pem", "cacert.pem", NULL, NULL);

//establishing connection to the database
if (!$mysqli->real_connect("localhost", "user", "password", "database")) {
  die('Connect Error: '. mysqli_connect_error());
}

echo 'Success... ' . $mysqli->host_info . "\n";

//closing the connection
$mysqli->close();
?>

The output of the above code will be similar to:

Success... MySQL host info: localhost via TCP/IP

Example: Procedural style

The example below shows the usage of mysqli_ssl_set() function.

<?php
$mysqli = mysqli_init();
if (!$mysqli) {
  die('mysqli_init failed');
}

mysqli_ssl_set($mysqli, "key.pem", "cert.pem", "cacert.pem", NULL, NULL);

//establishing connection to the database
if (!mysqli_real_connect($mysqli, "localhost", "user", "password", "database")) {
  die('Connect Error: '. mysqli_connect_error());
}

echo 'Success... ' . mysqli_get_host_info($mysqli) . "\n";

//closing the connection
mysqli_close($mysqli);
?>

The output of the above code will be similar to:

Success... MySQL host info: localhost via TCP/IP

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