PHP rename with date stamp -

we want make script renames file name date stamp, we're new php have now.

<?php rename("test.txt", "tes3.txt"); ?> 

we tried things below don't work.

$date = new datetime(); echo $date->format('y-m-d h:i:sp') . "\n"; 

i hope guys have answer how can this. thanks

all have use textual output (string) produced $date->format(...) , inject answer in rename call.

$date = new datetime(); rename("test.txt", "test" . $date->format('y-m-d h:i:sp') . ".txt"); 

but advisable not use spaces in filenames, if want files accessible through server/website/...