Validating check box validation instance code using PHP

check box checkbox is often used in PHP form submission, this article through an example to tell you how PHP determines whether the value of check box checkbox is selected, the need for friends can refer to the example of this article.

This article introduces you to two points of knowledge:

• PHP form submission How to get the value of check box checkbox

• How PHP determines if the value in a check box checkbox is selected

Let's take a look at the code.

<?php  /**  * Verify the validity of the check box in PHP */  $value = ' yes ';  echo "<input type= ' checkbox ' name= ' subscribe ' value= ' yes '/> Verify data";  if (Isset ($_post[' subscribe ')) {      if ($_post[' subscribe '] = = $value) {          $subscribed = true;      } else {          $ subscribed = false;          print ' submitted check box value is invalid. ';      }  } else {      $subscribed = false;  }  if ($subscribed) {      print ' validation is valid! ';  } else {      print ' validation is not valid! ';  }