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<?php class Currency { public $currencyCode; public function __construct($currencyCode) { $this->currencyCode = $currencyCode; } public function equals(Currency $currency) { return $this->currencyCode === $currency->currencyCode; } } class Money { public $amount; public $currency; public function __construct($amount, Currency $currency = null) { $this->currency = $currency ?: new Currency('USD'); } } echo "True/Object comparison with loosy operator:\r\n"; var_dump(new Money(55) == true); echo "True/Object comparision with strict operator:\r\n"; var_dump(new Money(55) === true); echo "False/Null comparison with loose operator:\r\n"; var_dump(null == false); echo "False/Null comparision with strict operator:\r\n"; var_dump(null === false); // $currency is passed in, $currency == true $revenue = new Money(55, new Currency('GBP')); echo "Short-hand ternary when currency is set:\r\n"; var_dump($revenue->currency->equals(new Currency('GBP'))); // $currency is null, $currency == false $assets = new Money(55); echo "Short-hand ternary when currency is not set:\r\n"; var_dump($assets->currency->equals(new Currency('USD')));
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
True/Object comparison with loosy operator: bool(true) True/Object comparision with strict operator: bool(false) False/Null comparison with loose operator: bool(true) False/Null comparision with strict operator: bool(false) Short-hand ternary when currency is set: bool(true) Short-hand ternary when currency is not set: bool(true)
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected ':' in /in/pipik on line 25
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected ':' in /in/pipik on line 25
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/pipik on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/pipik on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/pipik on line 5
Process exited with code 255.

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