Creating a custom button in PHP

Question

Creating a custom button in PHP

Currently, I am in the process of developing a shopping cart feature. One key requirement is to send both the product ID and the desired quantity chosen by the user to another file named cart.php.

Below is an excerpt from my code snippet:

for($i=0;$i<$numOfRows;$i++){
  $prodID=mysql_result($result, $i, "ProductID");
  $prodTitle=mysql_result($result, $i, "Title");
  $prodAuthor=mysql_result($result, $i, "Author1");
  $prodPrice=mysql_result($result, $i, "Price");

  Print"<h4>ID: $prodID \n     </h4>";
  Print"<h4>Title: $prodTitle \n       </h4>";
  Print"<h4>Author: $prodAuthor \n     </h4>";
  Print"<h4>Price: $ $prodPrice \n     </h4>";

  Print" <form method ='POST'>";
  Print"<p><label> Quantity";
  Print"<input name='quantity' type='text' pattern='[1-9]{1,50}'/>";
  Print"</label>";
  Print"<input type='button' value='Add To Cart' onClick='cart.php?pid=$prodID'/>";
  Print"</p></form>";
}

I tried using just

<a href='cart.php?pid=$prodID'>Add To Cart</a>

, which sends the product ID successfully, but I also need to include the quantity parameter in the request. Despite this, when I click on Add To Cart, it fails to redirect me to the cart.php page as intended.

php html mysql forms form-submit

Answer 1

Answer №1

To utilize the POST method, include a hidden input with the PID details. Here is an illustrative example:

echo "<form method ='POST' action ='cart.php'>";
echo "<p><label> Quantity";
echo "<input name='quantity' type='text' pattern='[1-9]{1,50}'/>";
echo "</label>";
echo "<input type='hidden' name = 'pid' value='$prodID'>";
echo "<input type='button' value='Add To Cart'/>";
echo "</p></form>";

If you prefer to use the GET method, refer to the @Specter response

Answer 2

To utilize the POST method, include a hidden input with the PID details. Here is an illustrative example:

echo "<form method ='POST' action ='cart.php'>";
echo "<p><label> Quantity";
echo "<input name='quantity' type='text' pattern='[1-9]{1,50}'/>";
echo "</label>";
echo "<input type='hidden' name = 'pid' value='$prodID'>";
echo "<input type='button' value='Add To Cart'/>";
echo "</p></form>";

If you prefer to use the GET method, refer to the @Specter response

Answer 3

Answer №2

Instead of complicating things, why not just submit the form normally using a type="submit" with method="GET":

echo "<form method ='GET' action='cart.php'>";
    echo "<p><label> Quantity: ";
        echo "<input name='quantity' type='text' pattern='[1-9]{1,50}'/>";
    echo "</label>";
    echo "
        <input type='hidden' name='pid' value='$prodID' />
        <input type='submit' value='Add To Cart' />
    ";
echo "</p></form>";

In the file cart.php, simply use $_GET for all variables:

<?php

if(!empty($_GET['quantity']) && !empty($_GET['pid'])) {
    $quantity = $_GET['quantity'];
    $pid = $_GET['pid'];
    // continue with the remaining code
}

A quick reminder:

Avoid using mysql_* functions in your code. These functions are no longer maintained and officially deprecated. Consider using PDO or MySQLi instead of mysql_*. Here's a helpful red box to guide you. Learn about prepared statements and choose between PDO or MySQLi - this article can help you make the right decision. For PDO users, check out this tutorial.

Answer 4

Instead of complicating things, why not just submit the form normally using a type="submit" with method="GET":

echo "<form method ='GET' action='cart.php'>";
    echo "<p><label> Quantity: ";
        echo "<input name='quantity' type='text' pattern='[1-9]{1,50}'/>";
    echo "</label>";
    echo "
        <input type='hidden' name='pid' value='$prodID' />
        <input type='submit' value='Add To Cart' />
    ";
echo "</p></form>";

In the file cart.php, simply use $_GET for all variables:

<?php

if(!empty($_GET['quantity']) && !empty($_GET['pid'])) {
    $quantity = $_GET['quantity'];
    $pid = $_GET['pid'];
    // continue with the remaining code
}

A quick reminder:

Avoid using mysql_* functions in your code. These functions are no longer maintained and officially deprecated. Consider using PDO or MySQLi instead of mysql_*. Here's a helpful red box to guide you. Learn about prepared statements and choose between PDO or MySQLi - this article can help you make the right decision. For PDO users, check out this tutorial.

Answer 5

Answer №3

Your onclick event is set to use the GET method, while your form is expecting the POST method and you have not specified the action to be 'cart.php' in your form tag... there could be other issues as well...

Here's a suggestion:

for($i=0;$i<$num Of Rows; $i++)
{
   $prodID=mysql_result($result, $i, "ProductID");
   $prodTitle=mysql_result($result, $i, "Title");
   $prodAuthor=mysql_result($result, $i, "Author1");
   $prodPrice=mysql_result($result, $i, "Price");

   Print"<h4>ID: $prodID \n    </h4>";
   Print"<h4>Title: $prodTitle \n      </h4>";
   Print"<h4>Author: $prodAuthor \n    </h4>";
   Print"<h4>Price: $ $prodPrice \n    </h4>";

   Print"<form action='cart.php' method ='POST'>";
   Print"<p><label> Quantity";
   Print"<input name='pid' type = 'hidden' value='$prodID'>";
   Print"<input name='quantity' type='text' pattern='[1-9]{1,50}'/>";
   Print"</label>";
   Print"<input type='submit' value='Add To Cart'>";
   Print"</p></form>";
}

Answer 6

Your onclick event is set to use the GET method, while your form is expecting the POST method and you have not specified the action to be 'cart.php' in your form tag... there could be other issues as well...

Here's a suggestion:

for($i=0;$i<$num Of Rows; $i++)
{
   $prodID=mysql_result($result, $i, "ProductID");
   $prodTitle=mysql_result($result, $i, "Title");
   $prodAuthor=mysql_result($result, $i, "Author1");
   $prodPrice=mysql_result($result, $i, "Price");

   Print"<h4>ID: $prodID \n    </h4>";
   Print"<h4>Title: $prodTitle \n      </h4>";
   Print"<h4>Author: $prodAuthor \n    </h4>";
   Print"<h4>Price: $ $prodPrice \n    </h4>";

   Print"<form action='cart.php' method ='POST'>";
   Print"<p><label> Quantity";
   Print"<input name='pid' type = 'hidden' value='$prodID'>";
   Print"<input name='quantity' type='text' pattern='[1-9]{1,50}'/>";
   Print"</label>";
   Print"<input type='submit' value='Add To Cart'>";
   Print"</p></form>";
}

Creating a custom button in PHP

Answer №1

Answer №2

Answer №3

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