using arrays or variables inside _POST

[f.ismayil]

I have the following loop in which I receive Parse error:

 

$letters = array ("A", "B", "C", "D","E", "F", "G", "H","I", "J", "K", "L",

"M", "N", "O", "P","Q", "R", "S", "T","U", "V", "W", "X",

"Y", "Z", "&#198", "&#216", "&#197");

 

 

for ($i = 1; $i < 29; $i++) {

  if ($_POST['$letters['$i']']){

    echo "You have selected the following products:" . "<br>" . $_POST['$letters['$i']];

  }

}

 

or is it possible to write something like that:

 

for ($i = 1; $i < 300; $i++) {

  if ($_POST['$i']){

    echo "You have selected the following products:" . "<br>" . $_POST['$i'];

  }

}

 

 

Please, help me. I need to use array and variables inside _POST[].

[dcro2]

If you want PHP to evaluate your strings (like turn $i into its value), you have to enclose them in double quotes. But in this case, you don't even need to use quotes. All the single/double quotes do is tell PHP that you're writing a string.

for ($i = 1; $i < 29; $i++) { 
  if ($_POST[$letters[$i]]){ 
    echo "You have selected the following products:" . "<br>" . $_POST[$letters[$i]]; 
  }
}

PS: I'm not so good at explaining these kinds of things, so if you don't understand maybe someone else could explain better.

[AbraCadaver]

Probably a better approach to your overall logic, but how about:

 

$letters = array_merge(range("A", "Z"), array("&#198", "&#216", "&#197"));

foreach($letters as $letter) {
  if(isset($_POST[$letter])) {
    echo "You have selected the following products:" . "<br>" . $_POST[$letter];
  }
}

[f.ismayil]

dcro2 thanks for your comment. You are good enough in explaining. Just give code and I will understand. I wrote your code, but this time I have received 2 different notices:

Undifined index: B

Undifined index: C

Undifined index: D

.

.

.

.

Undifined index: Z

 

and

 

Undifined offset 30

Undifined offset 31

.

.

.

Undifined offset 304

 

As I understood this time problem is not in syntax. Any idea?

[kenrbnsn]

Please post the form that is being used.

[AbraCadaver]

dcro2 thanks for your comment. You are good enough in explaining. Just give code and I will understand. I wrote your code, but this time I have received 2 different notices:

Undifined index: B

Undifined index: C

Undifined index: D

.

.

.

.

Undifined index: Z

 

and

 

Undifined offset 30

Undifined offset 31

.

.

.

Undifined offset 304

 

As I understood this time problem is not in syntax. Any idea?

 

Because those don't exist.  Use isset() as in my example.

[f.ismayil]

Thanks, AbraCadaver. Your code worked fine. I would like to thank everybody for contribution. You helped me very much in learning PHP.