Converts datetime string to given format

format-datetime.php

<?php
    /**
     * Convert date/time string to given format
     *
     * @param string $dateTimeString
     * @param string $format
     * @param string $noValueStr
     *
     * @return bool|string
     */
    
    function formatDateTime($dateTimeString = '',$format = 'M d, Y @ h:i a',$noValueStr = '-') {
    
        $dateTimeString = trim($dateTimeString);
    
        if($dateTimeString == '') {
            return $noValueStr;
        }
    
        $ts = strtotime($dateTimeString);
    
        if($ts <= 0) {
            return $noValueStr;
        }
    
        return date($format,$ts);
    
    }