3v4l.org

run code in 300+ PHP versions simultaneously
<?php $daysOfWeek = array(0=>'pon',1=>'wt',2=>'sr',3=>'czw',4=>'pt',5=>'sb',6=>'nd'); $converted = array(); foreach ($daysOfWeek as $key=>$checked) { $converted[++$key] = $checked; } $converted[0] = $converted[7]; unset($converted[7]); print_r($converted);

preferences:
37.44 ms | 402 KiB | 5 Q