'Fatal error: Array callback has to contain indices 0 and 1

I am getting this error:

Fatal error: Array callback has to contain indices 0 and 1 in C:\xampp\htdocs\phpprojects\plapp\worker.php on line 53

How can I solve that problem? What's wrong with what I am doing here?

$results = mysql_query("SELECT asin_link FROM work WHERE email=$w_email");
      while($row = mysql_fetch_array($result)) {
      $work_link = $row['asin_link'];
      echo '<a href="'.$work_link.'" target="'.$work_link.'">Visit Work link<br></a>';
      echo '<form action="" method="post">
        ASIN Number: <input type="text" name="asin"><br>
        <input type="submit" value="Submit" name="submit">
      </form>';}
      if (isset($_POST['submit'])) {
        $asin = $_POST('asin');
        $qu ="INSERT INTO work (asin, email, asin_link) VALUES ('$asin', '$w_email','$work_link')";
        if (mysql_query($qu)) {
        echo "Your ASIN was received! Thanks";
      }
      }
phpmysql


Solution 1:[1]

change this 

$asin = $_POST('asin');

to

$asin = $_POST['asin'];

Solution 2:[2]

It happens because your code tried to call an array as a function. (That's why the error calls it Array Callback)

I know it's really late for any answers on this, but for anyone else coming from Googling this error and seeking more info I post this example of alternative syntax, it seems to run PHP >= 7 :

<?php
    class A {
        static function ech($a) {echo $a;}
        function echa($a) {echo $a;}
    }
    ['A', 'ech']('Test');
    [new A, 'echa']('Test');

Yes, it seems arrays can be called as functions.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1
Solution 2 AlexisAmasis

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