Définitions des fonctions

La déclaration des fonctions respecte l'indentation du style "K&R" :

<?php
function fooFunction($arg1$arg2 '')
{
    if (
condition) {
        
le_job;
    }
    return 
$valeur;
}
?>

Les arguments possédant des valeurs par défaut vont à la fin de la liste des arguments. Il faut toujours chercher à retourner une valeur ayant un sens lorsque cela est possible. Voici un exemple un peu plus long :

<?php
function connect(&$dsn$persistent false)
{
    if (
is_array($dsn)) {
        
$dsninfo = &$dsn;
    } else {
        
$dsninfo DB::parseDSN($dsn);
    }

    if (!
$dsninfo || !$dsninfo['phptype']) {
        return 
$this->raiseError();
    }

    return 
true;
}
?>

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Last updated: Sun, 29 Aug 2010 — Download Documentation
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User Notes:

Note by: Mike
Note to previous post: the Allman style is not only used for functions but also for class definitions.
Note by: pear at alan hogan dot com
Allman style is defined here for those unfamiliar with it:
http://en.wikipedia.org/wiki/Indent_style

Please note that the PEAR coding standards *do not* follow Allman style for *control structures*, only for functions.
Note by: pear at alan hogan dot com
Again according to Wikipedia, it would seem that PEAR, in fact, advocates K&R style:

function foo ()
{
//do stuff();
}

while (true) {
if (true ) {
//x..
}
}

It should be noted that both Allman and K&R agree on how to format function definitions.