Wordpress trim content to 100 characters

end-of-word.php

<?php 
	// Trims the_content. In place of excerpt, this allows us to output line breaks and styling 
	$post_content = get_the_content_with_formatting();
	// Checks the string length, if under 500 chars...
		if (strlen($post_content) < 500){
		// Outputs the whole post content
		print $post_content . '...'; 
	}else{
		// Output only 500 chars, but don't cut halfway through a word
		$post_trimmed = substr($post_content, 0, strpos($post_content, ' ', 500));
		print $post_trimmed . '...';
	}
?>

no-formatting.php

<?php 
	// Trims the_content. In place of excerpt, this allows us to output line breaks and styling 
	$post_content = get_the_content();
	// Checks the string length, if under 500 chars...
		if (strlen($post_content) < 500){
		// Outputs the whole post content
		print $post_content . '...'; 
	}else{
		// Output only 500 chars, but don't cut halfway through a word
		$post_trimmed = substr($post_content, 0, strpos($post_content, ' ', 500));
		print $post_trimmed . '...';
	}
?>

Cool.. thanks!