What is the significance of naming input fields with square brackets, such as "Beschreibung[]" in PHP forms, and how does it impact data handling?

When naming input fields with square brackets in PHP forms, such as "Beschreibung[]", it signifies that the input field is an array. This allows multiple values to be submitted for the same field name, which is useful for handling form data where multiple values need to be processed. To properly handle this data in PHP, you can access the values using the $_POST superglobal as an array. 

<form method="post">
  <input type="text" name="Beschreibung[]">
  <input type="text" name="Beschreibung[]">
  <input type="text" name="Beschreibung[]">
  <input type="submit" value="Submit">
</form>

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
  $beschreibungen = $_POST['Beschreibung'];
  
  foreach ($beschreibungen as $beschreibung) {
    echo $beschreibung . "<br>";
  }
}
?>

Keywords

PHP input fields square brackets data handling arrays

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