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@ 2015-09-23T10:05:08Z

<?php
class Ancestor {
    public $publicVar = "ancestor's public var\n";
    static $staticVar = "ancestor's static var\n";
    function publicMethod(){
        echo "this is ancestor's public method\n";
        // is $this is set up
        if(isset($this)){
            echo "publicMethod is in object context\n";
        }else{
            echo "publicMethod is in static context\n";
        }
    }
    
    static function staticMethod(){
        echo "this is ancestor's static method\n";
        // is $this is set up
        if(isset($this)){
            echo "staticMethod is in object context\n";
        }else{
            echo "staticMethod is in static context\n";
        }
    }
}

class Descendant extends Ancestor {
    public $publicVar = "descendant's public var\n";
    static $staticVar = "descendant's static var\n";
    
    function publicMethod(){
        echo "this is descendant's public method\n";
        // is $this is set up
        if(isset($this)){
            echo "publicMethod is in object context\n";
        }else{
            echo "publicMethod is in static context\n";
        }
    }
    
    static function staticMethod(){
        echo "this is descendant's static method\n";
        // is $this is set up
        if(isset($this)){
            echo "staticMethod is in object context\n";
        }else{
            echo "staticMethod is in static context\n";
        }
    }
}

$ancestor = new Ancestor();
$descendant = new Descendant();

// From Outside Of An Instance/Class:
echo Ancestor::$publicVar;
echo Ancestor::$staticVar;
echo Descendant::$publicVar;
echo Descendant::$staticVar;


//Ancestor::publicMethod();

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: Fatal error: Uncaught Error: Access to undeclared static property Ancestor::$publicVar in /in/O9fpa:55 Stack trace: #0 {main} thrown in /in/O9fpa on line 55
Process exited with code 255.
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Fatal error: Uncaught Error: Access to undeclared static property Ancestor::$publicVar in /in/O9fpa:55 Stack trace: #0 {main} thrown in /in/O9fpa on line 55
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33: Fatal error: Uncaught Error: Access to undeclared static property: Ancestor::$publicVar in /in/O9fpa:55 Stack trace: #0 {main} thrown in /in/O9fpa on line 55
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40: Fatal error: Access to undeclared static property: Ancestor::$publicVar in /in/O9fpa on line 55
Process exited with code 255.

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