Problems with const variables and connectors

When a variable defined by the const keyword is concatenated with a string and assigned to another const variable,

<code>报syntax error, unexpected '.', expecting ',' or ';'
</code>

The code is as follows

<code>const a = '你好';
const b = a.'certs/';//直接报错</code>

Can you please help me

Reply content:

When a variable defined by the const keyword is concatenated with a string and assigned to another const variable,

<code>报syntax error, unexpected '.', expecting ',' or ';'
</code>

The code is as follows

<code>const a = '你好';
const b = a.'certs/';//直接报错</code>

Can you please help me

Nothing to help, the grammar doesn’t allow you to write like this.
Const definitions cannot use operators, variables and the like.
Besides what a is, at least it should be const b = self::a . 'certs/', although it is still illegal.

You lack context. You can only use it in a class. For external PHP constants, use define
PHP constants