How can beginners in PHP avoid issues with headers being sent before using the header function?

When headers are sent before using the header function in PHP, it can cause errors such as "Cannot modify header information." To avoid this issue, beginners can use output buffering to capture any output before sending headers. This can be done by using ob_start() at the beginning of the script and ob_end_flush() at the end to send the output.

```php
&lt;?php
ob_start();

// Your PHP code here

ob_end_flush();
?&gt;

How can beginners in PHP avoid issues with headers being sent before using the header function?

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