How can I concatenate a constant and a variable and store it in a class constant using PHP?

Question

  class My_class
 {
     const STATUS_ERROR = 0;
     const STATUS_OK = 1;
     const DB_TABLE = TABLE_PREFIX.  'class_table';
 }

The two states of consts work fine and can be accessed in class methods, because self::STATUS_ERROR and self::STATUS_OK just fine.

The problem is how to stop the next error that occurs when trying to determine the third constant.

Parse error: syntax error, unexpected '.', expecting ',' or ';' in /home/sub/sub/directory/script.php

+6

oop php class const constants

Matthew Feb 10 '10 at 10:27

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2 answers

a const must be defined with a constant value, they cannot be the result of the expression

+3

Neil aitken Feb 10 '10 at 10:31

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troelskn · Accepted Answer · 2010-02-10T10:30:28+0000

Not. The constants are constant. You cannot store anything in them.

However, you can use a static property.

 class My_Class { public static $DB_TABLE; } My_Class::$DB_TABLE = TABLE_PREFIX . 'class_table';

You cannot do this in a declaration, so you may prefer a static method instead.

 class My_Class { public static function dbTable() { return TABLE_PREFIX . 'class_table'; } }