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Calculate Reading Time (for WordPress content)
<?php
/**
* READING TIME
*
* Calculate an approximate reading-time for a post.
*
* @param string $content The content to be measured.
* @return integer Reading-time in seconds.
*/
function reading_time( $content ) {
// Predefined words-per-minute rate.
$words_per_minute = 225;
$words_per_second = $words_per_minute / 60;
// Count the words in the content.
$word_count = str_word_count( strip_tags( $content ) );
// [UNUSED] How many minutes?
$minutes = floor( $word_count / $words_per_minute );
// [UNUSED] How many seconds (remainder)?
$seconds_remainder = floor( $word_count % $words_per_minute / $words_per_second );
// How many seconds (total)?
$seconds_total = floor( $word_count / $words_per_second );
return $seconds_total;
}
/**
* PARSE TIME
*
* Convert seconds (int) into a nicely formatted string.
*
* @param integer $seconds The number of seconds.
* @return string Formatted output.
*/
function parse_read_time( $seconds ) {
// String to store our output.
$string_output = '';
// Double-check we're using an integer.
$seconds = (int) $seconds;
// How many minutes?
$minute_count = floor( $seconds / 60 );
$minute_count = convert_number_to_words( $minute_count );
// How many seconds?
$minute_remainder = $seconds % 60;
/**
* Specific responses for a range
* of times up to two minutes:
*/
if ( $seconds < 30 ) {
$string_output .= 'hardly any time at all.';
} elseif ( $seconds < 50 ) {
$string_output .= 'less than a minute.';
} elseif ( $seconds < 55 ) {
$string_output .= 'nearly a minute.';
} elseif ( $seconds < 65 ) {
$string_output .= 'one minute dead.';
} elseif ( $seconds < 85 ) {
$string_output .= 'a minute and a bit.';
} elseif ( $seconds < 95 ) {
$string_output .= 'roughly a minute and a half.';
} elseif ( $seconds < 120 ) {
$string_output .= 'less than two minutes.';
/**
* Dynamic responses for a variety
* of times over two minutes:
*/
} elseif ( $minute_remainder < 2 || $minute_remainder > 58 ) {
// If we're within +/- 2 seconds of a minute:
$string_output .= $minute_count . ' minutes, on the nose.';
} elseif ( $minute_remainder > 50 ) {
// If we're within less than 10 seconds short of any minute:
$string_output .= 'just shy of ' . $minute_count . ' minutes.';
} elseif ( $minute_remainder < 10 ) {
// If we're within less than 10 seconds over any minute:
$string_output .= 'a little over ' . $minute_count . ' minutes.';
} elseif ( $minute_remainder < 15 || $minute_remainder > 45 ) {
// If we're within +/- 15 seconds of any minute:
$string_output .= 'about ' . $minute_count . ' minutes.';
} elseif ( $minute_remainder > 20 && $minute_remainder < 40 ) {
// If we're within +/- 10 seconds of any half-minute:
$string_output .= $minute_count . ' and a half minutes.';
} elseif ( $minute_remainder < 10 || $minute_remainder > 50 ) {
$string_output .= $minute_count . ' minutes (ish).';
} else {
$string_output .= 'something like ' . $minute_count . ' minutes.';
}
return $string_output;
}
/**
* DISPLAY NUMBERS
*
* Convert numbers into human-readable words.
*
* Borrowed from:
* http://www.karlrixon.co.uk/writing/convert-numbers-to-words-with-php/
*
* @param integer $number Raw number.
* @return string Number as a word.
*/
function convert_number_to_words($number) {
$dictionary = array(
0 => 'zero',
1 => 'one',
2 => 'two',
3 => 'three',
4 => 'four',
5 => 'five',
6 => 'six',
7 => 'seven',
8 => 'eight',
9 => 'nine',
10 => 'ten',
11 => 'eleven',
12 => 'twelve',
13 => 'thirteen',
14 => 'fourteen',
15 => 'fifteen',
16 => 'sixteen',
17 => 'seventeen',
18 => 'eighteen',
19 => 'nineteen',
20 => 'twenty',
30 => 'thirty',
40 => 'fourty',
50 => 'fifty',
60 => 'sixty',
70 => 'seventy',
80 => 'eighty',
90 => 'ninety',
100 => 'hundred'
);
$string = $dictionary[$number];
return $string;
}
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