PHP: Remove hashtags from a caption

remove_hashtags.php

<?php

/**
 * Removes hashtags from the given text. Hashtags at the end of the text are removed,
 * and hashtags within the text are unhashed.
 * 
 * E.g.
 * Case 1: This is an example with lots of hashtags at the end #hash1 #hash2 #hash3 #hash4 #hash5
 * Result: This is an example with lots of hashtags at the end
 * 
 * Case 2: Look at this #great #food! #ilovehashtags #share #example
 * Result: Look at this great food!
 * 
 * @param string $caption The text to remove hashtags from
 * @return string The given text with hashtags removed
 */
function remove_hashtags($caption)
{
	// Get ready for some regex magic...
	return
		// Remove remaining hashes but keep the text inside the caption
		trim(str_replace('#', '',
		trim(preg_replace('/^(.+?)#\w+$/m', '${1}', // Edge case #hash1
		trim(preg_replace('/^(.+?)#\w+ #\w+$/m', '${1}', // Edge case #hash1 #hash2
		// Main case where there are at least three hashtags at the end of the string
		trim(preg_replace('/^(.+?)#\w+ (#\w+ )+#\w+$/m', '${1}',
		trim($caption)))))))));
}

Works like a charm. Thanks Summatix