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<?php
/**
* Utility class working with strings
*
* Standard: PSR-2
* @link http://www.php-fig.org/psr/psr-2
*
* @package DUP
* @subpackage classes/utilities
* @copyright (c) 2017, Snapcreek LLC
* @license https://opensource.org/licenses/GPL-3.0 GNU Public License
*
*/
class DUP_STR
{
/**
* Append the value to the string if it doesn't already exist
*
* @param string $string The string to append to
* @param string $value The string to append to the $string
*
* @return string Returns the string with the $value appended once
*/
public static function appendOnce($string, $value)
{
return $string.(substr($string, -1) == $value ? '' : $value);
}
/**
* Returns true if the string contains UTF8 characters
* @see http://php.net/manual/en/function.mb-detect-encoding.php
*
* @param string $string The class name where the $destArray exists
*
* @return null
*/
public static function hasUTF8($string)
{
return preg_match('%(?:
[\xC2-\xDF][\x80-\xBF] # non-overlong 2-byte
|\xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs
|[\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} # straight 3-byte
|\xED[\x80-\x9F][\x80-\xBF] # excluding surrogates
|\xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3
|[\xF1-\xF3][\x80-\xBF]{3} # planes 4-15
|\xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16
)+%xs', $string);
}
/**
* 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);
}
/**
* 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 ends 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 ends with the $needle
*/
public static function endsWith($haystack, $needle)
{
$length = strlen($needle);
if ($length == 0) {
return true;
}
return (substr($haystack, -$length) === $needle);
}
}