Create variable from $_POST array in php

Question

I am having a $_POST array look like this:

Array
(
    [veryfy_doc_type] => Array
            (
                [0] => 1
                [1] => 2
            )

    [id_number] => Array
            (
                [0] => 3242424
                [1] => 4456889
            )

    [document_issuer] => Array
            (
                    [0] => 1
                    [1] => 3
            )

    [verify_doc_expiry_date] => Array
            (
                    [0] => 2016-01-26
                    [1] => 2015-02-20
            )

    [doc_id] => Array
            (
                    [0] => 15
                    [1] => 16
            )

    [user_id] => Array
            (
                    [0] => 14
                    [1] => 14
            )
)

Using this array I need to get each values into php variables.

I tried it something like this, but it doesn't work for me.

foreach($_POST AS $k => $v) { 
    //print_r($v); 
    list($doc_type, $id_number, $issuer, $expiry_date, $doc_id, $user_id) = $v;
}

echo "Type = $doc_type";

Can anybody tell me how to figure this out. Thank you.

$_POST is php variable, so the values already are "in" one ;-) — VolkerK
– VolkerK, Commented Jan 8, 2016 at 1:58
@Terminus, I checked the question that you have linked. but not sure how it help for this scenario. Can you kindly show me an example. Thank you. — user3733831
– user3733831, Commented Jan 8, 2016 at 2:03

jameshwart lopez · Accepted Answer · 2016-01-08 02:35:57Z

2

This might help you since you can also use extract in php to create variables.

<?php
$_POST = array(
    'veryfy_doc_type'=> array(1,2),
    'id_number' => array(3242424,4456889),
    'document_issuer'=> array(1,3),
    'verify_doc_expiry_date'=> array('2016-01-26','2015-02-20'),
    'doc_id' => array(15,16),
    'doc_id' => array(14,14)
);


extract($_POST);
print_r($veryfy_doc_type);
print_r($id_number);

answered Jan 8, 2016 at 2:35

jameshwart lopez

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4 Comments

scrowler Over a year ago

Dangerous thing to suggest when you're dealing with posted data.

Mikey Over a year ago

A lot of things are dangerous. It's up to the developer to make that call.

jameshwart lopez Over a year ago

@Robbiee I dont know how could it be dangerous if he will just use a certain index that you know.I think you are also saying that using $_POST['post_name'] variable is dangerous.. when in fact you know the post_name index.

scrowler Over a year ago

I mean that if you use say $userId in your script then someone could post that variable and have it potentially overwrite yours. Use with caution is all I'm saying.

scrowler · Accepted Answer · 2016-01-08 01:58:56Z

1

So you want to reference each of the sub-array values while looping the main array... maybe something like this?

// Loop one of the sub arrays - you need to know how many times to loop!
foreach ($_POST['veryfy_doc_type'] as $key => $value) {
    // Filter the main array and use the $key (0 or 1) for the callback
    $rowValues = array_map(function($row) use ($key) {
        // Return the sub-array value using the $key (0 or 1) for this level
        return $row[$key];
    }, $_POST);

    print_r($rowValues);
}

Example: https://eval.in/498895

This would get you structured arrays for each set of data.

From here I'd suggest you leave the arrays as they are rather than exporting to variables, but if you wanted to you you could use the list() as in your example.

edited Jan 8, 2016 at 1:58

answered Jan 8, 2016 at 1:52

scrowler

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Comments

VolkerK · Accepted Answer · 2016-01-08 02:34:57Z

1

You can use a MultipleIterator for that:

<?php
$post = array(
    'veryfy_doc_type' => array('1','2'),
    'id_number' => array('3242424','4456889'),
    'document_issuer' => array(1,3),
    'verify_doc_expiry_date' => array('2016-01-26','2015-02-20'),
    'doc_id' => array(15,16),
    'user_id' => array(14,14)
);


$mit = new MultipleIterator(MultipleIterator::MIT_NEED_ALL|MultipleIterator::MIT_KEYS_ASSOC);
foreach($post as $k=>$v) {
    $mit->attachIterator( new ArrayIterator($v), $k);
}


foreach( $mit as $row ) {
    echo $row['doc_id'], ' ', $row['id_number'], ' ', $row['verify_doc_expiry_date'], "\r\n";
}

prints

15 3242424 2016-01-26
16 4456889 2015-02-20

If you have control over the client code you can change the names of the POST parameters in a way that php build this structure automagically. E.g.

<form method="POST" action="test.php">
    <input type="hidden" name="record[0][veryfy_doc_type]" value="1" />
    <input type="hidden" name="record[0][id_number]" value="3242424" />
    <input type="hidden" name="record[0][document_issuer]" value="1" />
    <input type="hidden" name="record[0][verify_doc_expiry_date]" value="2016-01-26" />
    <input type="hidden" name="record[0][doc_id]" value="15" />
    <input type="hidden" name="record[0][user_id]" value="14" />

    <input type="hidden" name="record[1][veryfy_doc_type]" value="2" />
    <input type="hidden" name="record[1][id_number]" value="4456889" />
    <input type="hidden" name="record[1][document_issuer]" value="3" />
    <input type="hidden" name="record[1][verify_doc_expiry_date]" value="2015-02-20" />
    <input type="hidden" name="record[1][doc_id]" value="16" />
    <input type="hidden" name="record[1][user_id]" value="14" />

    <input type="submit" />
</form>

would do/cause that.

edited Jan 8, 2016 at 2:34

answered Jan 8, 2016 at 2:06

VolkerK

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7 Comments

user3733831 Over a year ago

Can you show me how to use list() within foreach loop. I tried it something like this list($doc_type, $id_number, $issuer, $expiry_date, $doc_id, $user_id) = $row;. But it have Undefined offset: 5 error.

VolkerK Over a year ago

Change MultipleIterator::MIT_KEYS_ASSOC to MultipleIterator::MIT_KEYS_NUMERIC. But why not simply use $row? There's no need for additional pollution of the variable namespace.

user3733831 Over a year ago

I need execute an update query. something like this :

$stmt->bind_param('iissii', $doc_type,$id_number, $issuer, $expiry_date, $doc_id, $user_id); foreach ($mit as $row) {   list($doc_type, $id_number, $issuer, $expiry_date, $doc_id, $user_id) = $row;   $stmt->execute(); }

user3733831 Over a year ago

Is there other way to do it without using list();

VolkerK Over a year ago

In that special case I'd go with list() as well.

|

Norvert John Abella · Accepted Answer · 2016-01-08 02:36:32Z

0

If you only want to get the value of the post then you can have a simple multidimentional loop. no need to make it broad

   foreach($_POST as $keyName => $row){
      // $keyName will be verify_doc_type, id_number, etc..
      foreach($row as $value){
      // do something
      echo $value;
     }
  }

Hope that helps.

answered Jan 8, 2016 at 2:36

Norvert John Abella

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Comments

Sybghatallah Marwat · Accepted Answer · 2020-08-13 06:58:37Z

0

This method will generate variables of same name as in POST array:

    foreach ($_POST as $k => $v )
    {
        $$k =  addslashes(trim($v ));
    
    }

answered Aug 13, 2020 at 6:58

Sybghatallah Marwat

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Comments

EOZyo · Accepted Answer · 2021-07-20 17:02:22Z

0

I know this post is a bit old, but I was recently trying to achieve this very same thing.

Hopefully the answer will point others in the right direction.

As per the documentation on list():

Since PHP 7.1, keys can be specified

Example from the manual:

<?php
  $arr = ['locality' => 'Tunis', 'postal_code' => '1110'];

  list('postal_code' => $zipCode, 'locality' => $locality) = $arr;

  echo $zipCode; // will output 1110
  echo $locality; // will output Tunis
?>

https://www.php.net/manual/en/function.list.php#121094

answered Jul 20, 2021 at 17:02

EOZyo

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