Php，date_modify（）带变量

Question

I need to use the indexed element as the amount to change the date by

$id = $_POST['id'];
$ids = explode(',',$id);

$dateCreated = date('Y-m-d'); 
$dateExpiredtemp =date_create($dateCreated);
date_modify($dateExpiredtemp,'+ $ids[2]'); 
$dateExpired = date('$dateExpiredtemp');

date_modify($dateExpiredtemp,'+ $ids[2]');

This line provides this error

Warning: date_modify(): Failed to parse time string (+ $ids[2]) at position 0 (+): Unexpected character in

$ids[2] is a string and it needs to be carried into the altering parameter of date_modify

Answer 1

Change this line of code

date_modify($dateExpiredtemp,'+ $ids[2]');

into

date_modify($dateExpiredtemp,'+ ' . $ids[2]);

Your initial code will not recognize the $ids[2] since it is included in the string. Therefore, $ids[2] won't be parsed.