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Home/ Questions/Q 8384115
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Editorial Team
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Editorial Team
Asked: June 9, 20262026-06-09T17:19:43+00:00 2026-06-09T17:19:43+00:00

I want to do a concatenation to call my define but php don’t want.

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I want to do a concatenation to call my define but php don’t want.

By example :

define('FOO_1', 'string 1');
define('FOO_2', 'string 2');

I want to call it dynamically :

$id = 1;
echo FOO_.$id;

But it displays :

FOO_1
(not “string 1”);

How can I call my define dynamically ?

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  1. Editorial Team
    Editorial Team
    2026-06-09T17:19:44+00:00Added an answer on June 9, 2026 at 5:19 pm

    By using constant()

    echo constant('FOO_'.$id);
    

    See doc here: http://php.net/constant

    credits to Yent

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