Is there any way to print a constant in the middle of a string , without using concatenation, how do you do with variables in PHP?
Example:
$nome = 'wallace';
echo "Meu nome é {$nome}";
For constants, I know I could print concatenating:
echo 'meu nome é' . NOME_USUARIO;
But I'd like to avoid concatenation because I find it inelegant.
Are there other possible ways to do this?
You can use the printf() function to print a formatted string and then pass the values to exchange or use commas in that case.
define('NOME_USUARIO', 'lol');
echo 'meu nome é ', NOME_USUARIO;
printf('meu nome é %s', NOME_USUARIO);
A possible form would also be with something magical crazy that php allows: We can declare the value of the function constant - which serves to get the value of the constant - and save it in the variable . Then call it in the middle of the string you want.
See:
$c = 'constant';
define('nome', 'Wallace');
echo "Meu nome é {$c('nome')}";
I do not think it's possible , at least until I read the documentation:
However, by doing some tests I realized that it is possible to force / cheat the syntax, such as @Wallace made in response , but the idea here is to create a variable that is an anonymous function, so you will not need the apostrophes , an example:
<?php
define('FOO', 'bar');
$constant = function ($nome) {
return $nome;
};
echo "FOO = {$constant(FOO)}";
Another example catching "native" constants:
<?php
$constant = function ($nome) {
return $nome;
};
echo "PHP_VERSION = {$constant(PHP_VERSION)}";
Example on ideone: link
If it does not exist as define() it will display exactly what was written:
<?php
$constant = function ($nome) {
return $nome;
};
echo "BAZ = {$constant(BAZ)}"; //Exibe "BAZ = BAZ"