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Ultimo aggiornamento 2011-10-24
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another good example of expression orientation is pre- and post-increment and decrement. users of php/fi 2 and many other languages may be familiar with the notation of variable++ and variable--. these are increment and decrement operators. in php/fi 2, the statement '$a++' has no value (is not an expression), and thus you can't assign it or use it in any way. php enhances the increment/decrement capabilities by making these expressions as well, like in c. in php, like in c, there are two types of increment - pre-increment and post-increment. both pre-increment and post-increment essentially increment the variable, and the effect on the variable is idential. the difference is with the value of the increment expression. pre-increment, which is written '++$variable', evaluates to the incremented value (php increments the variable before reading its value, thus the name 'pre-increment'). post-increment, which is written '$variable++' evaluates to the original value of $variable, before it was incremented (php increments the variable after reading its value, thus the name 'post-increment').
les deux types d'opérateur d'incrémentation jouent le même rôle (c'est-à-dire qu'ils incrémentent la variable).
Ultimo aggiornamento 2011-10-24
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