In what scenarios should print_r or var_dump be used instead of echo in PHP for debugging purposes?

print_r or var_dump should be used instead of echo in PHP for debugging purposes when you need to display the structure and values of complex variables like arrays or objects. These functions provide a more detailed and readable output compared to echo, making it easier to identify issues in your code. By using print_r or var_dump, you can quickly inspect the contents of variables and troubleshoot any unexpected behavior. 

// Example of using print_r for debugging
$data = array('apple', 'banana', 'cherry');
print_r($data);
```

```php
// Example of using var_dump for debugging
$user = new stdClass();
$user->name = 'John Doe';
$user->age = 30;
var_dump($user);

Keywords

print_r var_dump echo debugging PHP

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