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1 year ago
I wanted an associative list of arguments, in case some else does too, I'm leaving it here.

I hope PHP gets native support for this, because a core implementation would be faster than this userland backtrace+reflection implementation:
<?php

/**
 * Get function arguments as associative array
 * (same as func_get_args() but with keys)
 * 
 * @param bool $populateMissingArgumentsWithDefaults whether to populate the array with default values for missing arguments
 * 
 * @return array
 */
function func_get_args_associative(bool $populateMissingArgumentsWithDefaults = false): array
{
    $trace = debug_backtrace(0, 2)[1];
    $reflection = null;
    if (isset($trace['class'])) {
        $reflection = new \ReflectionMethod($trace['class'], $trace['function']);
    } else {
        $reflection = new \ReflectionFunction($trace['function']);
    }
    $ret = [];
    foreach ($reflection->getParameters() as $param) {
        if (array_key_exists($param->getPosition(), $trace['args'])) {
            $ret[$param->name] = $trace['args'][$param->getPosition()];
        } elseif ($populateMissingArgumentsWithDefaults) {
            // because of the "required arguments declared after an optional argument are implicitly required" rule:
            assert($param->isDefaultValueAvailable(), "i think all params are either in trace[args] or have default values");
            $ret[$param->name] = $param->getDefaultValue();
        }
    }
    return $ret;
}
?>
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