<?php
abstract class ParentClass {
const TEST_CONSTANT = null;
public function __construct()
{
if (!defined(self::TEST_CONSTANT)) {
throw new Exception("Please define TEST_CONSTANT!");
}
}
abstract protected function someFunction();
}
class ChildClass extends ParentClass {
const TEST_CONSTANT = "value";
protected function someFunction()
{
//some functionality here
}
}
$x = new ChildClass();
Deprecated: defined(): Passing null to parameter #1 ($constant_name) of type string is deprecated in /in/Pfgg9 on line 8
Fatal error: Uncaught Exception: Please define TEST_CONSTANT! in /in/Pfgg9:9
Stack trace:
#0 /in/Pfgg9(25): ParentClass->__construct()
#1 {main}
thrown in /in/Pfgg9 on line 9
Process exited with code 255.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
Deprecated: defined(): Passing null to parameter #1 ($constant_name) of type string is deprecated in /in/Pfgg9 on line 8
Fatal error: Uncaught Exception: Please define TEST_CONSTANT! in /in/Pfgg9:9
Stack trace:
#0 /in/Pfgg9(25): ParentClass->__construct()
#1 {main}
thrown in /in/Pfgg9 on line 9
Process exited with code 255.
Fatal error: Uncaught Exception: Please define TEST_CONSTANT! in /in/Pfgg9:9
Stack trace:
#0 /in/Pfgg9(25): ParentClass->__construct()
#1 {main}
thrown in /in/Pfgg9 on line 9
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Fatal error: Uncaught exception 'Exception' with message 'Please define TEST_CONSTANT!' in /in/Pfgg9:9
Stack trace:
#0 /in/Pfgg9(25): ParentClass->__construct()
#1 {main}
thrown in /in/Pfgg9 on line 9
Process exited with code 255.