PHP get post data from inputs with arrays []

Question

I am creating a form that users can add extra fields to dynamically and every time a new input is created, it is named accountemails[type] with the type being different for each group.

I want to post this form and retrieve the data grouped by the type

For example, if I have 2 groups - group1 and group2 my inputs would be named:

name="accountemails[group1]"
name="accountemails[group2]"

And there could be multiple with the same group name

For the post in php, I tried

foreach($_POST["accountemails"] as $type => $email) {

}

Which I though would work and I could use $type as each group and then $email for each value but that only shows the last posted input value per group

What exactly are you doing inside the foreach loop? And what values does $_POST["accountemails"] contain (see the comment above)? — Qirel
– Qirel, Commented Dec 11, 2016 at 13:52
You have to discriminate the fields per array in HTML. See stackoverflow.com/q/9073690/498457 — Christoph Grimmer
– Christoph Grimmer, Commented Dec 11, 2016 at 14:01
so i have posted g1, g2 and o1 and the var dump shows array(4) { ["general"]=> string(2) "g2" ["orders"]=> string(2) "o1" ["renewals"]=> string(0) "" ["accounts"]=> string(0) "" } — charlie
– charlie, Commented Dec 11, 2016 at 14:31

Kitson88 · Accepted Answer · 2016-12-11 15:24:37Z

To elaborate on Benoti's answer, it sounds like your overwriting your $_POST['accountemails'] data when a new value is added. Add the group data to an array.

$_POST['accountemails']['group1'] [] = "Group 1 - 1"; //Emulates html form: name = accountemails[group1][] with value of: Group 1 - 1
$_POST['accountemails']['group1'] [] = "Group 1 - 2"; //Emulates html form: name = accountemails[group1][] with value of: Group 1 - 2

$_POST['accountemails']['group2'] [] = "Group 2 - 1"; //Emulates html form: name = accountemails[group2][] with value of: Group 2 - 1
$_POST['accountemails']['group2'] [] = "Group 2 - 2"; //Emulates html form: name = accountemails[group2][] with value of: Group 2 - 2

foreach ($_POST as $v) {

    foreach ($v['group1'] as $email) {

        echo "Group 1 Email: " . $email;
        echo "<br>";
    }

    foreach ($v['group2'] as $email) {

        echo "Group 2 Email: " . $email;
        echo "<br>";     
    }
}

Output

Group 1 Email: Group 1 - 1
Group 1 Email: Group 1 - 2
Group 2 Email: Group 2 - 1
Group 2 Email: Group 2 - 2

Benoti · Accepted Answer · 2016-12-11 14:49:40Z

1

If you want to add multiple form input with the same name, you need to add double brackets at the very last end of the name.

 name="accountemails[group1][]"
 name="accountemails[group2][]"

Then if the user adds extra-fields for group1, each new accountemails in each different group will be added to an array that you'll be able to retrieve in your foreach loop.

edited Dec 11, 2016 at 14:49

answered Dec 11, 2016 at 14:16

Benoti

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13 Comments

Qirel Over a year ago

The indexes (group1/group2) are different, so using name="accountemails[group1]"/name="accountemails[group2]" (without the extra brackets) is valid and will submit both fields into the $_POST['accountemails'] array. You're essentially making it another dimention wide when adding [] at the end, which isn't needed.

Kitson88 Over a year ago

@Qirel but OP has stated that there could be multiple records with the same group name e.g. [group1]. So I'm guessing that OP is attempting to add data to the array of accountemails[group1] or accountemails[group2] which means this answer above would be correct as all OP is doing at the moment is overwriting ['group1'] or ['group2'] when a new value has been added.

Kitson88 Over a year ago

@Qirel Just to clarify, I'm not trying cause a war :-) I'm just curious because this would of been my logic for resolving. Obviously if I'm wrong then put me straight.

charlie Over a year ago

this is what my form looks like: s27.postimg.org/fk54dsm6r/… - so each input would be accountemails[general][] and accountemails[orders][]

Qirel Over a year ago

@Kitson88 Who said anything about a war? ;-) We're all friendly here! You might very well be right, though - I think I might've miss-interpreted the problem (and missed entirely the "And there could be multiple with the same group name" part of OPs question!).

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