PHP type hinting

type_hinting.php

set_error_handler('handle');

function foo(integer $p1, bool $p2) {

echo "ok" . PHP_EOL;
}

$param1 = 123;
$param2 = 'string val!';
foo($param1, $param2);

function handle($lvl, $msg)
{
    static $_types = array(
        'boolean,'   => 'boolean',
        'bool,'      => 'boolean',
        'integer,'   => 'integer',
        'int,'       => 'integer',
        'float,'     => 'float',
        'double,'    => 'float',
        'real,'      => 'float',
        'string,'    => 'string',
        'resource,'  => 'resource'
    );
    
    if ($lvl == E_RECOVERABLE_ERROR) {
        $errmsg = explode(' ', $msg, 13);
        if (isset($_types[$errmsg[10]]) && $_types[$errmsg[10]] == $errmsg[11]) {
            return true;
        }
        return false;
    }
}