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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Short-circuited boolean evaluation

php at cotest dot com
17-Jul-2002 11:13

"Short-circuiting" is often called "lazy evaluation," too.

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Function TRUE/FALSE return values Error messages have changed

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Last updated: Sat, 27 Jan 2007