Are there any specific restrictions on using output functions like echo within a PHP script that handles image processing functions?

When handling image processing functions in PHP, it is important to avoid using output functions like echo within the script as they may interfere with the image data being processed. To prevent any conflicts, it is recommended to buffer the output using ob_start() before any output functions and then flush the buffer using ob_end_flush() after the image processing is complete. 

<?php
ob_start();

// Image processing functions here

ob_end_flush();
?>

Keywords

echo output functions PHP script image processing functions restrictions

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