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<?php echo "\$a unset\n isset: "; var_export(isset($a)); echo "\n value: "; var_export($a); echo "\n\n"; $a = null; echo "\$a is null\n isset: "; var_export(isset($a)); echo "\n value: "; var_export($a); echo "\n\n"; $a = (object) null; echo "\$a is object\n isset: "; var_export(isset($a)); echo "\n value: "; var_export($a); echo "\n\n"; echo "\$a->b unset:\n isset: "; var_export(isset($a->b)); echo "\n value: "; var_export($a->b); echo "\n\n"; $a->b = null; echo "\$a->b is null:\n isset: "; var_export(isset($a->b)); echo "\n value: "; var_export($a->b); echo "\n\n"; echo "\$a->b is null, what's \$a?\n isset: "; var_export(isset($a)); echo "\n value: "; var_export($a); echo "\n";
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
$a unset isset: false value: Warning: Undefined variable $a in /in/ngRNN on line 5 NULL $a is null isset: false value: NULL $a is object isset: true value: (object) array( ) $a->b unset: isset: false value: Warning: Undefined property: stdClass::$b in /in/ngRNN on line 23 NULL $a->b is null: isset: false value: NULL $a->b is null, what's $a? isset: true value: (object) array( 'b' => NULL, )
Output for 7.3.0 - 7.3.31, 7.3.33, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
$a unset isset: false value: Notice: Undefined variable: a in /in/ngRNN on line 5 NULL $a is null isset: false value: NULL $a is object isset: true value: (object) array( ) $a->b unset: isset: false value: Notice: Undefined property: stdClass::$b in /in/ngRNN on line 23 NULL $a->b is null: isset: false value: NULL $a->b is null, what's $a? isset: true value: (object) array( 'b' => NULL, )
Output for 7.3.32, 7.4.26
$a unset isset: false value: NULL $a is null isset: false value: NULL $a is object isset: true value: (object) array( ) $a->b unset: isset: false value: NULL $a->b is null: isset: false value: NULL $a->b is null, what's $a? isset: true value: (object) array( 'b' => NULL, )
Output for 7.1.25 - 7.1.31, 7.2.0 - 7.2.33
$a unset isset: false value: Notice: Undefined variable: a in /in/ngRNN on line 5 NULL $a is null isset: false value: NULL $a is object isset: true value: stdClass::__set_state(array( )) $a->b unset: isset: false value: Notice: Undefined property: stdClass::$b in /in/ngRNN on line 23 NULL $a->b is null: isset: false value: NULL $a->b is null, what's $a? isset: true value: stdClass::__set_state(array( 'b' => NULL, ))
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