php static in if statement

Question

I have a construction like this in my config file:

<?php
if (true) {
    $nonstatic = 1;
    static $config = 1;
}
else {
    $nonstatic = 2;
    static $config = 2;
}

echo $nonstatic;
echo $config;
?>

So why the $config contains 2 if this part of the statement is false and $nonstatic contains 1? Is it a bug?

Wouldn't you be better declaring the variable outside the if and simply assigning it a value inside? I've never seen the static keyword used like this, although that doesn't mean it's wrong... — DaveRandom, Commented Sep 13, 2011 at 16:16
Seems like last static declaration (irrespective of anything) decides the value. — Vikash, Commented Sep 13, 2011 at 16:18
@Michael, of course there is more code. This is a simplified version, describing what I am trying to reach. — Aldekein, Commented Sep 13, 2011 at 16:19
@DaveRandom since it's a configuration file for a project I would like for the variable to be read-only. — Aldekein, Commented Sep 13, 2011 at 16:20

Lightness Races in Orbit · Accepted Answer · 2011-09-13 16:23:38Z

11

I suppose this chunk is being included from a function.

Initialisations of static variables are resolved at compile-time, and if the interpreter finds multiple initialisations, it simply takes the bottom one.

edited Sep 13, 2011 at 16:23

Lightness Races in Orbit

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answered Sep 13, 2011 at 16:21

MauganRa

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In particular, this means that conditionals around a static initialisation have no effect.
– Lightness Races in Orbit
Commented Sep 13, 2011 at 16:24

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