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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* Implements PMA_StringByte interface using the "mbstring" extension.
*
* @package PhpMyAdmin-String
* @subpackage MB
*/
if (! defined('PHPMYADMIN')) {
exit;
}
require_once 'libraries/StringByte.int.php';
/**
* Implements PMA_StringByte interface using the "mbstring" extension.
*
* @package PhpMyAdmin-String
* @subpackage MB
*/
class PMA_StringMB implements PMA_StringByte
{
/**
* Returns length of string depending on current charset.
*
* @param string $string string to count
*
* @return int|false string length
*/
public function strlen($string)
{
return mb_strlen($string);
}
/**
* Returns substring from string, works depending on current charset.
*
* @param string $string string to count
* @param int $start start of substring
* @param int $length length of substring
*
* @return string|false the sub string
*/
public function substr($string, $start, $length = 2147483647)
{
$stringLength = $this->strlen($string);
if ($stringLength <= $start) {
return false;
}
if ($stringLength + $length < $start) {
return false;
}
return mb_substr($string, $start, $length, 'utf-8');
}
/**
* Returns number of substring from string.
*
* @param string $string string to check
* @param int $needle string to count
*
* @return int number of substring from the string
*/
public function substrCount($string, $needle)
{
return mb_substr_count($string, $needle, 'utf-8');
}
/**
* Returns position of $needle in $haystack or false if not found
*
* @param string $haystack the string being checked
* @param string $needle the string to find in haystack
* @param int $offset the search offset
*
* @return int|false position of $needle in $haystack or false
*/
public function strpos($haystack, $needle, $offset = 0)
{
if (null === $haystack) {
return false;
}
if (false === $needle) {
return false;
}
if (!is_string($needle) && is_numeric($needle)) {
$needle = (int)$needle;
$needle = $this->chr($needle);
}
return mb_strpos($haystack, $needle, $offset);
}
/**
* Returns position of $needle in $haystack - case insensitive - or false if
* not found
*
* @param string $haystack the string being checked
* @param string $needle the string to find in haystack
* @param int $offset the search offset
*
* @return int|false position of $needle in $haystack or false
*/
public function stripos($haystack, $needle, $offset = 0)
{
if (null === $haystack) {
return false;
}
if (false === $needle) {
return false;
}
if (!is_string($needle) && is_numeric($needle)) {
$needle = (int)$needle;
$needle = $this->chr($needle);
}
return mb_stripos($haystack, $needle, $offset);
}
/**
* Returns position of last $needle in $haystack or false if not found
*
* @param string $haystack the string being checked
* @param string $needle the string to find in haystack
* @param int $offset the search offset
*
* @return int|false position of last $needle in $haystack or false
*/
public function strrpos($haystack, $needle, $offset = 0)
{
if (null === $haystack) {
return false;
}
if (false === $needle) {
return false;
}
if (!is_string($needle) && is_numeric($needle)) {
$needle = (int)$needle;
$needle = $this->chr($needle);
}
return mb_strrpos($haystack, $needle, $offset);
}
/**
* Returns position of last $needle in $haystack - case insensitive - or false
* if not found
*
* @param string $haystack the string being checked
* @param string $needle the string to find in haystack
* @param int $offset the search offset
*
* @return int|false position of last $needle in $haystack or false
*/
public function strripos($haystack, $needle, $offset = 0)
{
if (null === $haystack) {
return false;
}
if (false === $needle) {
return false;
}
if (!is_string($needle) && is_numeric($needle)) {
$needle = (int)$needle;
$needle = $this->chr($needle);
}
return mb_strripos($haystack, $needle, $offset);
}
/**
* Returns part of $haystack string starting from and including the first
* occurrence of $needle to the end of $haystack or false if not found
*
* @param string $haystack the string being checked
* @param string $needle the string to find in haystack
* @param bool $before_needle the part before the needle
*
* @return string|false part of $haystack or false
*/
public function strstr($haystack, $needle, $before_needle = false)
{
if (!is_string($needle) && is_numeric($needle)) {
$needle = (int)$needle;
$needle = $this->chr($needle);
}
if (!is_string($haystack) || !is_string($needle) || null === $needle) {
return false;
}
return mb_strstr($haystack, $needle, $before_needle);
}
/**
* Returns part of $haystack string starting from and including the first
* occurrence of $needle to the end of $haystack - case insensitive - or false
* if not found
*
* @param string $haystack the string being checked
* @param string $needle the string to find in haystack
* @param bool $before_needle the part before the needle
*
* @return string|false part of $haystack or false
*/
public function stristr($haystack, $needle, $before_needle = false)
{
if (!is_string($needle) && is_numeric($needle)) {
$needle = (int)$needle;
$needle = $this->chr($needle);
}
if (!is_string($haystack) || !is_string($needle) || null === $needle) {
return false;
}
return mb_stristr($haystack, $needle, $before_needle);
}
/**
* Returns the portion of haystack which starts at the last occurrence or false
* if not found
*
* @param string $haystack the string being checked
* @param string $needle the string to find in haystack
*
* @return string|false portion of haystack which starts at the last occurrence or
* false
*/
public function strrchr($haystack, $needle)
{
if (!is_string($needle) && is_numeric($needle)) {
$needle = (int)$needle;
$needle = $this->chr($needle);
}
if (!is_string($haystack) || !is_string($needle) || null === $needle) {
return false;
}
return mb_strrchr($haystack, $needle);
}
/**
* Make a string lowercase
*
* @param string $string the string being lowercased
*
* @return string the lower case string
*/
public function strtolower($string)
{
return mb_strtolower($string);
}
/**
* Make a string uppercase
*
* @param string $string the string being uppercased
*
* @return string the upper case string
*/
public function strtoupper($string)
{
return mb_strtoupper($string);
}
/**
* Get the ordinal value of a multibyte string
* (Adapted from http://www.php.net/manual/en/function.ord.php#72463)
*
* @param string $string the string for which ord is required
*
* @return string the ord value
*/
public function ord($string)
{
if (false === $string || null === $string || '' === $string) {
return 0;
}
$str = mb_convert_encoding($string, "UCS-4BE", "UTF-8");
$substr = mb_substr($str, 0, 1, "UCS-4BE");
$val = unpack("N", $substr);
return $val[1];
}
/**
* Get the multibyte character of an ASCII
* (from http://fr2.php.net/manual/en/function.chr.php#69082)
*
* @param int $ascii the ASCII code for which character is required
*
* @return string the multibyte character
*/
public function chr($ascii)
{
return mb_convert_encoding(
pack("N", $ascii),
mb_internal_encoding(),
'UCS-4BE'
);
}
/**
* Perform a regular expression match
*
* Take care: might not work with lookbehind expressions.
*
* @param string $pattern Pattern to search for
* @param string $subject Input string
* @param int $offset Start from search
*
* @return int|false 1 if matched, 0 if doesn't, false on failure
*/
public function pregStrpos($pattern, $subject, $offset = 0)
{
$matches = array();
$bFind = preg_match(
$pattern, $this->substr($subject, $offset), $matches, PREG_OFFSET_CAPTURE
);
if (1 !== $bFind) {
return false;
}
return $matches[1][1] + $offset;
}
}
?>
|
