<?php
// define class constant linking to a not defined constant
class Foo {
const FOO = FOO;
}
class Bar {
const BAR = BAR;
}
// define the linked constant AFTER reading
Foo::FOO;
define('FOO', 'Value of FOO');
var_dump(Foo::FOO);
// define the linked constant BEFORE reading
define('BAR', 'Value of BAR');
var_dump(Bar::BAR);
Fatal error: Uncaught Error: Undefined constant "FOO" in /in/lPf4b:13
Stack trace:
#0 {main}
thrown in /in/lPf4b on line 13
Process exited with code 255.
Warning: Use of undefined constant FOO - assumed 'FOO' (this will throw an Error in a future version of PHP) in /in/lPf4b on line 13
string(3) "FOO"
string(12) "Value of BAR"
Notice: Use of undefined constant FOO - assumed 'FOO' in /in/lPf4b on line 13
string(3) "FOO"
string(12) "Value of BAR"
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_CONST, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/lPf4b on line 5
Process exited with code 255.
Parse error: parse error, unexpected T_CONST, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/lPf4b on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/lPf4b on line 5
Process exited with code 255.