Estimated Read Time plugin for WordPress

estimatedreadtime

<?php
/*
Plugin Name: Estimated Read Time
Plugin URI: http://www.apinapress.com/
Description: Adds an estimated read time to posts (just above post content)
Version: 0.0.1
Author: Dean Robinson
Author URI: http://www.apinapress.com
License: GPL3
*/

function ap_reading_time($content) {

	if (!in_the_loop () || !is_main_query ()) {
        	return $content;
    	}
    
	if(is_singular('post') ) {

		$count = str_word_count(wp_strip_all_tags($content) );
		$count = $count/200;

		//let's stop those pesky 3 digit numbers
		$count = round ( $count, 2 );
	
		$x = explode('.', $count);

		if($x[0] == 1) { $minutetext = "minute"; } else { $minutetext = "minutes"; } 
		$min = $x[0] . " " . $minutetext . " ";

		
		if (isset($x[1])) {
			$sec= 0.6 * $x[1];
			if($sec == "1") { $secondtext= " second"; } else { $secondtext= " seconds"; } 
			$min =  $min . round($sec) . $secondtext;
		}

		
		$content = "<p class='ap_reading_time'><span>Estimated reading time: </span>" . $min. "</p>" . $content;
		return $content;
	}
	else {
		return $content;
	}
}
add_filter('the_content', 'ap_reading_time');