note 79431 added to language.constants

I recently found I needed a way of retrieving the value of a constant dynamically - e.g. trying to find the value of FOO_BAR by passing 'FOO_' . $someVariableWithValueBAR. I came up with the following solution: <?php define('FOO_BAR','It works!'); define('FOO_FOO_BAR','It works again!'); // prints 'It works!' $changing_variable = 'bar'; echo constant('FOO_' . strtoupper($changing_variable)); // prints 'It works again!' $changing_variable = 'foo_bar'; echo constant('FOO_' . strtoupper($changing_variable)); ?> Note the use of strtoupper() as constants should be defined in uppercase for good practice - feel free to remove if you have constants defined in lowercase or you can set $changing_variable as uppercase. Might be of some use to someone! ---- Server IP: 87.124.64.96 Probable Submitter: 86.157.213.12 ---- Manual Page -- http://www.php.net/manual/en/language.constants.php Edit -- https://master.php.net/note/edit/79431 Del: integrated -- https://master.php.net/note/delete/79431/integrated Del: useless -- https://master.php.net/note/delete/79431/useless Del: bad code -- https://master.php.net/note/delete/79431/bad+code Del: spam -- https://master.php.net/note/delete/79431/spam Del: non-english -- https://master.php.net/note/delete/79431/non-english Del: in docs -- https://master.php.net/note/delete/79431/in+docs Del: other reasons-- https://master.php.net/note/delete/79431 Reject -- https://master.php.net/note/reject/79431 Search -- https://master.php.net/manage/user-notes.php