Viewing file:  String.class.php (6.71 KB) -rw-rw-rw-
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<?php
/**
* Specialized string class for phpMyAdmin.
* The SQL Parser code relies heavily on these functions.
*
* @package PhpMyAdmin-String
*/
/**
* Specialized string class for phpMyAdmin.
* The SQL Parser code relies heavily on these functions.
*
* @package PhpMyAdmin-String
*/
class PMA_String
{
/**
* @var PMA_StringType
*/
private $_type;
/**
* @var PMA_StringByte
*/
private $_byte;
/**
* Constructor
*/
public function __construct()
{
if (@function_exists('mb_strlen')) {
mb_internal_encoding('utf-8');
include_once 'libraries/StringMB.class.php';
$this->_byte = new PMA_StringMB();
} else {
include_once 'libraries/StringNative.class.php';
$this->_byte = new PMA_StringNative();
}
if (@extension_loaded('ctype')) {
include_once 'libraries/StringCType.class.php';
$this->_type = new PMA_StringCType();
} else {
include_once 'libraries/StringNativeType.class.php';
$this->_type = new PMA_StringNativeType();
}
}
/**
* Checks if a given character position in the string is escaped or not
*
* @param string $string string to check for
* @param integer $pos the character to check for
* @param integer $start starting position in the string
*
* @return boolean whether the character is escaped or not
*/
public function charIsEscaped($string, $pos, $start = 0)
{
$pos = max(intval($pos), 0);
$start = max(intval($start), 0);
$len = $this->strlen($string);
// Base case:
// Check for string length or invalid input or special case of input
// (pos == $start)
if ($pos <= $start || $len <= max($pos, $start)) {
return false;
}
$pos--;
$escaped = false;
while ($pos >= $start && $this->substr($string, $pos, 1) == '\\') {
$escaped = !$escaped;
$pos--;
} // end while
return $escaped;
}
/**
* Checks if a character is an SQL identifier
*
* @param string $c character to check for
* @param boolean $dot_is_valid whether the dot character is valid or not
*
* @return boolean whether the character is an SQL identifier or not
*/
public function isSqlIdentifier($c, $dot_is_valid = false)
{
return ($this->isAlnum($c)
|| ($ord_c = $this->ord($c)) && $ord_c >= 192 && $ord_c != 215 &&
$ord_c != 249
|| $c == '_'
|| $c == '$'
|| ($dot_is_valid != false && $c == '.'));
}
/**
* Returns length of string depending on current charset.
*
* @param string $string string to count
*
* @return int string length
*/
public function strlen($string)
{
return $this->_byte->strlen($string);
}
/**
* Returns substring from string, works depending on current charset.
*
* @param string $string string to count
* @param int $start start of substring
* @param int $length length of substring
*
* @return string the sub string
*/
public function substr($string, $start, $length = 2147483647)
{
return $this->_byte->substr($string, $start, $length);
}
/**
* Returns postion 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 integer position of $needle in $haystack or false
*/
public function strpos($haystack, $needle, $offset = 0)
{
return $this->_byte->strpos($haystack, $needle, $offset);
}
/**
* Make a string lowercase
*
* @param string $string the string being lowercased
*
* @return string the lower case string
*/
public function strtolower($string)
{
return $this->_byte->strtolower($string);
}
/**
* Get the ordinal value of a string
*
* @param string $string the string for which ord is required
*
* @return string the ord value
*/
public function ord($string)
{
return $this->_byte->ord($string);
}
/**
* Checks if a character is an alphanumeric one
*
* @param string $c character to check for
*
* @return boolean whether the character is an alphanumeric one or not
*/
public function isAlnum($c)
{
return $this->_type->isAlnum($c);
}
/**
* Checks if a character is an alphabetic one
*
* @param string $c character to check for
*
* @return boolean whether the character is an alphabetic one or not
*/
public function isAlpha($c)
{
return $this->_type->isAlpha($c);
}
/**
* Checks if a character is a digit
*
* @param string $c character to check for
*
* @return boolean whether the character is a digit or not
*/
public function isDigit($c)
{
return $this->_type->isDigit($c);
}
/**
* Checks if a character is an upper alphabetic one
*
* @param string $c character to check for
*
* @return boolean whether the character is an upper alphabetic one or not
*/
public function isUpper($c)
{
return $this->_type->isUpper($c);
}
/**
* Checks if a character is a lower alphabetic one
*
* @param string $c character to check for
*
* @return boolean whether the character is a lower alphabetic one or not
*/
public function isLower($c)
{
return $this->_type->isLower($c);
}
/**
* Checks if a character is a space one
*
* @param string $c character to check for
*
* @return boolean whether the character is a space one or not
*/
public function isSpace($c)
{
return $this->_type->isSpace($c);
}
/**
* Checks if a character is an hexadecimal digit
*
* @param string $c character to check for
*
* @return boolean whether the character is an hexadecimal digit or not
*/
public function isHexDigit($c)
{
return $this->_type->isHexDigit($c);
}
/**
* Checks if a number is in a range
*
* @param integer $num number to check for
* @param integer $lower lower bound
* @param integer $upper upper bound
*
* @return boolean whether the number is in the range or not
*/
public function numberInRangeInclusive($num, $lower, $upper)
{
return $this->_type->numberInRangeInclusive($num, $lower, $upper);
}
}
?>
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