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Automatically Bold (or Style) the First X Words of Content
<?php
/**
* Lede words
*
*/
add_filter( 'the_content', 'ac_the_content_lede_words' );
function ac_the_content_lede_words( $content ) {
// Get number of lede words
$lede_words = (int) get_post_meta( get_the_ID(), '_lede_words', true ); // Create metabox for this or manually save custom field value, and adjust key if necessary
// Bail: Zero lede words
if ( 0 === $lede_words ) {
return $content;
}
// Include trailing comma
$trailing_comma = true; // Set false to exclude trailing comma from lede words
$comma = ( false === $trailing_comma ) ? ',' : '';
// Expressions
$first = $second = $third = '';
switch ( $lede_words ) {
case 1:
$first = '[^\s<' . $comma . ']+';
break;
case 2:
$first = '[^\s<]+';
$third = '\s+[^\s' . $comma . ']+';
break;
case 3:
default:
$first = '[^\s<]+';
$second = '\s+[^\s]+';
$third = '\s+[^\s' . $comma . ']+';
}
// More than three lede words
while ( $lede_words > 3 ) {
// Repeat the second expression
$second .= '\s+[^\s]+';
$lede_words--;
}
// Replace
$content = preg_replace( '/<p>(' . $first . $second . $third . ')/', '<p><span class="lede-words">$1</span>', $content, 1 );
return $content;
}
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