WordPress usefull utils / extra methods

wordpress-utils.php

<?php
/**
 * Strips url from obsolete stuff, for prettier display
 * @param      string  $url    The url
 * @return     string  The cleaned up & pretty url for displaying
 */
function studio_strip_url( $url ) {
	return rtrim( str_replace(array( 'https://', 'http://', 'mailto:', 'tel:', 'www.' ), '', $url), '/' );
}

/**
 * Adds a <em> for easy styling (emphasized text should be between asterisks)
 * @param      string  $string  The string
 * @return     string  The styled string
 */
function studio_emphasize( $string ) {
	return preg_replace( '#\*(.*?)\*#', '<em>$1</em>', $string );
}

/**
 * Creates a link with attributes (if provided) => no more dirty HTML in php
 * @param      string  $url    The url (can be post id too)
 * @param      string  $text   The text
 * @param      array   $attr   The attribute
 * @return     string  The compiled <a href...>
 */
function studio_get_link( $url, $text, $attr = NULL ) {
	// early exit on no values
	if( empty($url) || $url == 'mailto:' || $url == 'tel:' ) { return; }

	// check if url is just a post id
	if( is_int($url) ) {
		$post_id = $url;
		$url     = get_the_permalink( $post_id );
		// early exit
		if( empty($url) ) { return; }
	}

	// add prettified url as text, if none provided
	if( empty($text) ) {
		$text = studio_strip_url( $url );
	}

	// setup start of a href
	$html = '<a href="'.str_replace( ' ', '', $url ).'"';

	// add attributes
	foreach( $attr as $name => $value ) { $html .= ' '.$name.'="'.$value.'"'; }

	// finish off the link
	$html .= '>'.$text.'</a>';

	// and return
	return $html;
}
function studio_link( $url, $text, $attr = NULL ) {
	echo studio_get_link( $url, $text, $attr = NULL );
}

/**
 * Adds an extra class on content p's
 * @param      string  $content  The content
 * @param      string  $class    The class
 * @return     string  Pretty content with added class
 */
function studio_add_content_class( $content, $class = NULL ) {
	$pretty_content = apply_filters( 'the_content', $content );
	return str_replace( '<p>', '<p class="'.$class.'">', $pretty_content );
}

/**
 * Gets the pretty/ formatted date
 * @param      integer   $post_id   The post identifier
 * @param      integer   $limit     The limit of days ago
 * @return     string    Prettified date display
 */
function studio_get_the_timetoshow( $post_id = NULL, $limit = 10 ) {
	// get current post ID if none provided
	if( $post_id == NULL ) { $post_id = get_the_ID(); }
	// early return if no ID
	if( empty($post_id) ) { return; }

	// get post date
	$post_date    = get_the_date( 'Y-m-d H:i:s', $post_id );
	// get limit date
	$max_date     = date( 'Y-m-d H:i:s', strtotime('-'.$limit.' days', strtotime('now')) );

	// check if postdate is within limit
	if( $max_date < $post_date ) {
		// show number of days ago
		$current_date = current_time('timestamp');
		$days_ago     = human_time_diff( get_the_time('U', $post_id), $current_date );
		$time_toshow  = $days_ago.' '.__('geleden', 'od');
	} else {
		// show date
		$time_toshow  = get_the_time( get_option('date_format'), $post_id );
	}
	return $time_toshow;
}
function studio_the_timetoshow( $post_id = NULL, $limit = 10 ) {
	echo studio_get_the_timetoshow( $post_id, $limit );
}

/**
 * Formats the number to a pretty format
 * @param      integer  $number    The number
 * @param      integer  $decimals  The number of decimals
 * @return     string   Formatted number with dot as thousands separator and comma as decimals separator
 */
function studio_get_pretty_number( $number, $decimals = 0 ) {
	return number_format($number, $decimals, ',', '.');
}