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<?php class SomeClass {} $instance = new SomeClass(); $reference = &$instance; echo (($instance === $reference) ? 'TRUE' : 'FALSE') ."\n"; $assigned = $instance; echo (($instance === $assigned) ? 'TRUE' : 'FALSE') ."\n"; $instance = null; echo (isset($instance) ? $instance : "NULL") . "\n"; echo (isset($assigned) ? $assigned : "NULL") . "\n"; echo (isset($reference) ? $reference : "NULL") . "\n";
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
TRUE TRUE NULL Fatal error: Uncaught Error: Object of class SomeClass could not be converted to string in /in/8ZQF7:17 Stack trace: #0 {main} thrown in /in/8ZQF7 on line 17
Process exited with code 255.
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33
TRUE TRUE NULL Recoverable fatal error: Object of class SomeClass could not be converted to string in /in/8ZQF7 on line 17
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20
TRUE TRUE NULL Catchable fatal error: Object of class SomeClass could not be converted to string in /in/8ZQF7 on line 17
Process exited with code 255.
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