array_append() And Short Assignation¶
PHP allows using short assignation operators with the array append operators. This means that the code will add 2 to the array append. No error is displayed, except in the case of ??=, who is yield a Fatal error, with an explicit “Cannot use [] for reading”.
In any case, all of those expressions make little sense : the short assignation operators shall exist on an existing value, not a new one. Here, it looks like the default value is null.
