What are some best practices for passing multiple values through hidden fields in PHP forms?

When passing multiple values through hidden fields in PHP forms, it is best practice to serialize the data into a single string before storing it in the hidden field. This helps to keep the form clean and organized, as well as prevent any potential issues with special characters or formatting. 

// Serialize the data before storing it in a hidden field
$data = array(
    'value1' => 'first value',
    'value2' => 'second value',
    'value3' => 'third value'
);

$serialized_data = serialize($data);
```

```html
<!-- Hidden field in the form to store the serialized data -->
<input type="hidden" name="hidden_data" value="<?php echo htmlentities($serialized_data); ?>">

Keywords

PHP hidden fields form submission data passing security

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