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<?php
namespace Box\Spout\Common\Helper;
/**
* Class StringHelper
* This class provides helper functions to work with strings and multibyte strings.
*
* @codeCoverageIgnore
*
* @package Box\Spout\Common\Helper
*/
class StringHelper
{
/** @var bool Whether the mbstring extension is loaded */
protected $hasMbstringSupport;
/**
*
*/
public function __construct()
{
$this->hasMbstringSupport = extension_loaded('mbstring');
}
/**
* Returns the length of the given string.
* It uses the multi-bytes function is available.
* @see strlen
* @see mb_strlen
*
* @param string $string
* @return int
*/
public function getStringLength($string)
{
return $this->hasMbstringSupport ? mb_strlen($string) : strlen($string);
}
/**
* Returns the position of the first occurrence of the given character/substring within the given string.
* It uses the multi-bytes function is available.
* @see strpos
* @see mb_strpos
*
* @param string $char Needle
* @param string $string Haystack
* @return int Char/substring's first occurrence position within the string if found (starts at 0) or -1 if not found
*/
public function getCharFirstOccurrencePosition($char, $string)
{
$position = $this->hasMbstringSupport ? mb_strpos($string, $char) : strpos($string, $char);
return ($position !== false) ? $position : -1;
}
/**
* Returns the position of the last occurrence of the given character/substring within the given string.
* It uses the multi-bytes function is available.
* @see strrpos
* @see mb_strrpos
*
* @param string $char Needle
* @param string $string Haystack
* @return int Char/substring's last occurrence position within the string if found (starts at 0) or -1 if not found
*/
public function getCharLastOccurrencePosition($char, $string)
{
$position = $this->hasMbstringSupport ? mb_strrpos($string, $char) : strrpos($string, $char);
return ($position !== false) ? $position : -1;
}
}