forked from mirror/pixelfed
105 lines
3.2 KiB
PHP
105 lines
3.2 KiB
PHP
|
<?php
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @author Takashi Nojima
|
||
|
|
* @copyright Copyright 2014, Takashi Nojima
|
||
|
|
* @license http://www.apache.org/licenses/LICENSE-2.0 Apache License v2.0
|
||
|
|
* @package Twitter.Text
|
||
|
|
*/
|
||
|
|
|
||
|
|
namespace App\Util\Lexer;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* String utility
|
||
|
|
*
|
||
|
|
* @author Takashi Nojima
|
||
|
|
* @copyright Copyright 2014, Takashi Nojima
|
||
|
|
* @license http://www.apache.org/licenses/LICENSE-2.0 Apache License v2.0
|
||
|
|
* @package Twitter
|
||
|
|
*/
|
||
|
|
class StringUtils
|
||
|
|
{
|
||
|
|
|
||
|
|
/**
|
||
|
|
* alias of mb_substr
|
||
|
|
*
|
||
|
|
* @param string $str
|
||
|
|
* @param integer $start
|
||
|
|
* @param integer $length
|
||
|
|
* @param string $encoding
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
public static function substr($str, $start, $length = null, $encoding = 'UTF-8')
|
||
|
|
{
|
||
|
|
if (is_null($length)) {
|
||
|
|
// for PHP <= 5.4.7
|
||
|
|
$length = mb_strlen($str, $encoding);
|
||
|
|
}
|
||
|
|
return mb_substr($str, $start, $length, $encoding);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* alias of mb_strlen
|
||
|
|
*
|
||
|
|
* @param string $str
|
||
|
|
* @param string $encoding
|
||
|
|
* @return integer
|
||
|
|
*/
|
||
|
|
public static function strlen($str, $encoding = 'UTF-8')
|
||
|
|
{
|
||
|
|
return mb_strlen($str, $encoding);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* alias of mb_strpos
|
||
|
|
*
|
||
|
|
* @param string $haystack
|
||
|
|
* @param string $needle
|
||
|
|
* @param integer $offset
|
||
|
|
* @param string $encoding
|
||
|
|
* @return integer
|
||
|
|
*/
|
||
|
|
public static function strpos($haystack, $needle, $offset = 0, $encoding = 'UTF-8')
|
||
|
|
{
|
||
|
|
return mb_strpos($haystack, $needle, $offset, $encoding);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* A multibyte-aware substring replacement function.
|
||
|
|
*
|
||
|
|
* @param string $string The string to modify.
|
||
|
|
* @param string $replacement The replacement string.
|
||
|
|
* @param int $start The start of the replacement.
|
||
|
|
* @param int $length The number of characters to replace.
|
||
|
|
* @param string $encoding The encoding of the string.
|
||
|
|
*
|
||
|
|
* @return string The modified string.
|
||
|
|
*
|
||
|
|
* @see http://www.php.net/manual/en/function.substr-replace.php#90146
|
||
|
|
*/
|
||
|
|
public static function substrReplace($string, $replacement, $start, $length = null, $encoding = 'UTF-8')
|
||
|
|
{
|
||
|
|
if (extension_loaded('mbstring') === true) {
|
||
|
|
$string_length = static::strlen($string, $encoding);
|
||
|
|
if ($start < 0) {
|
||
|
|
$start = max(0, $string_length + $start);
|
||
|
|
} elseif ($start > $string_length) {
|
||
|
|
$start = $string_length;
|
||
|
|
}
|
||
|
|
if ($length < 0) {
|
||
|
|
$length = max(0, $string_length - $start + $length);
|
||
|
|
} elseif ((is_null($length) === true) || ($length > $string_length)) {
|
||
|
|
$length = $string_length;
|
||
|
|
}
|
||
|
|
if (($start + $length) > $string_length) {
|
||
|
|
$length = $string_length - $start;
|
||
|
|
}
|
||
|
|
|
||
|
|
$suffixOffset = $start + $length;
|
||
|
|
$suffixLength = $string_length - $start - $length;
|
||
|
|
return static::substr($string, 0, $start, $encoding) . $replacement . static::substr($string, $suffixOffset, $suffixLength, $encoding);
|
||
|
|
}
|
||
|
|
return (is_null($length) === true) ? substr_replace($string, $replacement, $start) : substr_replace($string, $replacement, $start, $length);
|
||
|
|
}
|
||
|
|
}
|