how to pass an array in GET in PHP?

Question

$idArray = array(1,2,3,4);

can I write this line in HTML?

<form method='POST' action='{$_SERVER['PHP_SELF']}?arr={$idArray}'>

or should I write:

<form method='POST' action='{$_SERVER['PHP_SELF']}?arr[]={$idArray}'>

how will it be passed?

how should I handle it in the called page?

thanks !!

Answer 1

If you want to pass an array as parameter, you would have to add a parameter for each element. Your query string would become:

?arr[]=1&arr[]=2&arr[]=3&arr[]=4

As others have written, you can also serialize and unserialize the array.

But do you really have to send the data to the client again? It looks like you just need a way to persist the data between requests.

In this case, it is better imo to use sessions^(docs). This is also more secure as otherwise the client could modify the data.