Operator overloading extension for PHP7
Usage
Implement magic methods in a class to provide operator overloading automatically, for example:
class C {
private $value = 0;
public function __add($delta) {
$this->value += $delta;
return $this;
}
public function __toString() {
return strval($this->value);
}
}
$c = new C;
var_dump($c + 5); // object(C)#1 { ["C:value:private"]=>5 }The following overload methods are supported:
| Operator | Method |
|---|---|
| $o + $arg | __add($arg) |
| $o - $arg | __sub($arg) |
| $o * $arg | __mul($arg) |
| $o / $arg | __div($arg) |
| $o % $arg | __mod($arg) |
| $o ** $arg | __pow($arg) |
| $o << $arg | __sl($arg) |
| $o >> $arg | __sr($arg) |
| $o . $arg | __concat($arg) |
| $o | $arg | __bw_or($arg) |
| $o & $arg | __bw_and($arg) |
| $o ^ $arg | __bw_xor($arg) |
| ~$o | __bw_not() |
| $o === $arg | __is_identical($arg) |
| $o !== $arg | __is_not_identical($arg) |
| $o == $arg | __is_equal($arg) |
| $o != $arg | __is_not_equal($arg) |
| $o < $arg | __is_smaller($arg) |
| $o <= $arg | __is_smaller_or_equal($arg) |
| $o > $arg | __is_greater($arg) * |
| $o >= $arg | __is_greater_or_equal($arg) * |
| $o <=> $arg | __cmp($arg) |
| ++$o | __pre_inc() |
| $o++ | __post_inc() |
| --$o | __pre_dec() |
| $o-- | __post_dec() |
| $o = $arg | __assign($arg) |
| $o += $arg | __assign_add($arg) |
| $o -= $arg | __assign_sub($arg) |
| $o *= $arg | __assign_mul($arg) |
| $o /= $arg | __assign_div($arg) |
| $o %= $arg | __assign_mod($arg) |
| $o **= $arg | __assign_pow($arg) |
| $o <<= $arg | __assign_sl($arg) |
| $o >>= $arg | __assign_sr($arg) |
| $o .= $arg | __assign_concat($arg) |
| $o |= $arg | __assign_bw_or($arg) |
| $o &= $arg | __assign_bw_and($arg) |
| $o ^= $arg | __assign_bw_xor($arg) |
* - __is_greater() and __is_greater_or_equal() require a rebuild of the main PHP runtime using the included patch. Withtout this patch, $a > $b is automatically remapped to $b < $a by the engine.