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<?php class Foo { public static $static_prop = 'class prop'; public $prop = 'object prop'; static function printClassProp() { print 'print_' . self::$static_prop; print "print_{self::$static_prop}"; } function printObjectProp() { print "print_{$this->prop}"; } } $foo = new Foo; $foo->printObjectProp(); Foo::printClassProp();
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
print_object propprint_class prop Warning: Undefined variable $static_prop in /in/V08OC on line 8 print_{self::}
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.30, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
print_object propprint_class prop Notice: Undefined variable: static_prop in /in/V08OC on line 8 print_{self::}
Output for 7.3.32 - 7.3.33, 7.4.26
print_object propprint_class propprint_{self::}

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