PHP string and byte array conversion class example

PHP string and byte array conversion class example_PHP tutorial

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Release： 2016-07-13 10:44:16

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The article provides you with an example of conversion between PHP string and byte array. I hope the article will be helpful to all students.

The code is as follows

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/**

* Byte array and string conversion class

*/

class Bytes {

/**

* Convert a String to a byte array

* @param $str The string to be converted

* @param $bytes target byte array

* @author Zikie

*/
Public static function getBytes($string) {
          $bytes = array();
for($i = 0; $i < strlen($string); $i++){
                $bytes[] = ord($string[$i]);
          }
          return $bytes;
}

/**

* Convert byte array to String type data

* @param $bytes byte array

* @param $str target string

* @return a String type data

*/

Public static function toStr($bytes) {
          $str = '';
foreach($bytes as $ch) {
                 $str .= chr($ch);
          }

              return $str;
}

/**

* Convert an int to a byte array

* @param $byt target byte array

* @param $val The string to be converted

*

*/

Public static function integerToBytes($val) {
           $byt = array();
          $byt[0] = ($val & 0xff);
$byt[1] = ($val >> 8 & 0xff);
$byt[2] = ($val >> 16 & 0xff);
$byt[3] = ($val >> 24 & 0xff);
          return $byt;
}

/**

* Read an Integer type data from the specified position in the byte array

* @param $bytes byte array

* @param $position specified starting position

* @return an Integer type data

*/

Public static function bytesToInteger($bytes, $position) {
$val = 0;
          $val = $bytes[$position + 3] & 0xff;
$val <<= 8;
          $val |= $bytes[$position + 2] & 0xff;
$val <<= 8;
          $val |= $bytes[$position + 1] & 0xff;
$val <<= 8;
          $val |= $bytes[$position] & 0xff;
         return $val;
}

/**

* Convert a short string to a byte array

* @param $byt target byte array

* @param $val The string to be converted

*

*/

Public static function shortToBytes($val) {
           $byt = array();
          $byt[0] = ($val & 0xff);
$byt[1] = ($val >> 8 & 0xff);
          return $byt;
}

/**

* Read a Short type data from the specified position in the byte array.

* @param $bytes byte array

* @param $position specified starting position

* @return a Short type data

*/

Public static function bytesToShort($bytes, $position) {
$val = 0;
          $val = $bytes[$position + 1] & 0xFF;
$val = $val << 8;
          $val |= $bytes[$position] & 0xFF;
         return $val;
}

}
?>