Manual do PHP
Anterior | Apêndice D. Migrating from PHP/FI 2 to PHP 3 | Próxima

# Short-circuited boolean evaluation

In PHP 3.0 boolean evaluation is short-circuited. This means that in an expression like `(1 || test_me())`, the function test_me() would not be executed since nothing can change the result of the expression after the `1`.

This is a minor compatibility issue, but may cause unexpected side-effects.

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Error messages have changed | Acima | Function `TRUE`/`FALSE` return values