Last update: 2011-03-02 02:14:37
PHP permet le "type hinting" mais uniquement pour les objets et les tableaux. Voici une bouine trouvée sur php.net pour ajouter à cette fonctionnalité les types scalaires, en attendant une hypothétique modification de PHP en ce sens :
<?php
define('md_TYPEHINT_PCRE', '/^Argument (\d)+ passed to (?:(\w+)::)?(\w+)\(\) must be an instance of (\w+), (\w+) given/');
/**
* Adapted from a contribution of daniel.l.wood@gmail.com found at php.net
*/
class md_Hint
{
private static $Typehints = array(
'boolean' => 'is_bool',
'integer' => 'is_int',
'float' => 'is_float',
'string' => 'is_string',
'resrouce' => 'is_resource'
);
public static function initializeHandler()
{
set_error_handler('md_Hint::handleTypehint');
return TRUE;
}
private static function getTypehintedArgument($ThBackTrace, $ThFunction, $ThArgIndex, &$ThArgValue)
{
foreach($ThBackTrace as $ThTrace)
{
if (isset($ThTrace['function']) && $ThTrace['function'] == $ThFunction)
{
$ThArgValue = $ThTrace['args'][$ThArgIndex - 1];
return TRUE;
}
}
return FALSE;
}
public static function handleTypehint($ErrLevel, $ErrMessage)
{
if ($ErrLevel == E_RECOVERABLE_ERROR)
{
if (preg_match(md_TYPEHINT_PCRE, $ErrMessage, $ErrMatches))
{
list($ErrMatch, $ThArgIndex, $ThClass, $ThFunction, $ThHint, $ThType) = $ErrMatches;
if (isset(self::$Typehints[$ThHint]))
{
$ThBacktrace = debug_backtrace();
$ThArgValue = NULL;
if (self::getTypehintedArgument($ThBacktrace, $ThFunction, $ThArgIndex, $ThArgValue))
{
if (call_user_func(self::$Typehints[$ThHint], $ThArgValue))
{
return TRUE;
}
}
}
}
}
return FALSE;
}
}