PHP mysqli: get_client_info() function
mysqli_get_client_info() function / mysqli::get_client_info
The mysqli_get_client_info() function / mysqli::get_client_info returns the MySQL client library version.
Syntax:
Object oriented style
string mysqli::get_client_info ( void )
Procedural style
string mysqli_get_client_info ( mysqli $link )
Usage: Procedural style
mysqli_get_client_info(connection);
Parameter:
Name | Description | Required/Optional |
---|---|---|
connection | Specifies the MySQL connection to use. | Required |
Return value:
A string that represents the MySQL client library version.
Version: PHP 5, PHP 7
Example:
<?php
echo mysqli_get_client_info();
?>
Output:
mysqlnd 5.0.5-dev - 081106 - $Revision: 1.3.2.27 $
See also
Previous: get_charset
Next:
get_client_stats
PHP: Tips of the Day
Getting all defined constants
To get all defined constants including those created by PHP use the get_defined_constants function:
Example:
<?php $constants = get_defined_constants(); var_dump($constants); // pretty large list
Output:
array(2250) { ["E_ERROR"]=> int(1) ["E_RECOVERABLE_ERROR"]=> int(4096) ["E_WARNING"]=> ..... ..... resource(1) of type (stream) ["STDOUT"]=> resource(2) of type (stream) ["STDERR"]=> resource(3) of type (stream) }
To get only those constants that were defined by your app call the function at the beginning and at the end of your script (normally after the bootstrap process):
<?php $constants = get_defined_constants(); define("HELLO", "hello"); define("WORLD", "world"); $new_constants = get_defined_constants(); $myconstants = array_diff_assoc($new_constants, $constants); var_export($myconstants);
Output:
array ( 'HELLO' => 'hello', 'WORLD' => 'world', )
It's sometimes useful for debugging
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