Source of class.snaplib.u.string.php - main

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         * @param  String  $str        The string or array being searched and replaced on, otherwise known as the haystack
 
<?php
/**
 * Snap strings utils
 *
 * Standard: PSR-2
 * @link http://www.php-fig.org/psr/psr-2
 *
 * @package DupLiteSnapLib
 * @copyright (c) 2017, Snapcreek LLC
 * @license https://opensource.org/licenses/GPL-3.0 GNU Public License
 *
 */
defined('ABSPATH') || defined('DUPXABSPATH') || exit;
​
if (!class_exists('DupLiteSnapLibStringU', false)) {
​
    class DupLiteSnapLibStringU
    {
​
        public static function boolToString($b)
        {
            return ($b ? 'true' : 'false');
        }
​
        public static function truncateString($s, $maxWidth)
        {
            if (strlen($s) > $maxWidth) {
                $s = substr($s, 0, $maxWidth - 3).'...';
            }
​
            return $s;
        }
​
        /**
         * Returns true if the $haystack string starts with the $needle
         *
         * @param string  $haystack     The full string to search in
         * @param string  $needle       The string to for
         *
         * @return bool Returns true if the $haystack string starts with the $needle
         */
        public static function startsWith($haystack, $needle)
        {
            $length = strlen($needle);
            return (substr($haystack, 0, $length) === $needle);
        }
​
        /**
         * Returns true if the $haystack string end with the $needle
         *
         * @param string  $haystack     The full string to search in
         * @param string  $needle       The string to for
         *
         * @return bool Returns true if the $haystack string starts with the $needle
         */
        public static function endsWith($haystack, $needle)
        {
            $length = strlen($needle);
            if ($length == 0) {
                return true;
            }
​
            return (substr($haystack, -$length) === $needle);
        }
​
        /**
         * Returns true if the $needle is found in the $haystack
         *
         * @param string  $haystack     The full string to search in
         * @param string  $needle       The string to for
         *
         * @return bool
         */
        public static function contains($haystack, $needle)
        {
            $pos = strpos($haystack, $needle);
            return ($pos !== false);
        }
​
        /**
         * 
         * @param string $glue
         * @param array $pieces
         * @param string $format
         * @return string
         */
        public static function implodeKeyVals($glue, $pieces, $format = '%s="%s"')
        {
            $strList = array();
            foreach ($pieces as $key => $value) {
                if (is_scalar($value)) {
                    $strList[] = sprintf($format, $key, $value);