php字符串與byte字節(jié)數(shù)組轉(zhuǎn)化類示例

php?
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/**?
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*?byte數(shù)組與字符串轉(zhuǎn)化類?
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*/
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class Bytes {?
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/**?
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*?轉(zhuǎn)換一個(gè)String字符串為byte數(shù)組?
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* @param $str 需要轉(zhuǎn)換的字符串?
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* @param $bytes 目標(biāo)byte數(shù)組?
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* @author Zikie?
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*/
??? public static function getBytes($string) {?
??????? $bytes = array();?
??????? for($i = 0; $i
???????????? $bytes[] = ord($string[$i]);?
??????? }?
??????? return $bytes;?
??? }?
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/**?
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* 將字節(jié)數(shù)組轉(zhuǎn)化為String類型的數(shù)據(jù)?
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* @param $bytes 字節(jié)數(shù)組?
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* @param $str 目標(biāo)字符串?
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* @return 一個(gè)String類型的數(shù)據(jù)?
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*/
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??? public static function toStr($bytes) {?
??????? $str = '';?
??????? foreach($bytes as $ch) {?
??????????? $str .= chr($ch);?
??????? }?
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?????????? return $str;?
??? }?
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/**?
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*?轉(zhuǎn)換一個(gè)int為byte數(shù)組?
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* @param $byt 目標(biāo)byte數(shù)組?
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* @param $val 需要轉(zhuǎn)換的字符串?
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*?
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*/
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??? public static function integerToBytes($val) {?
??????? $byt = array();?
??????? $byt[0] = ($val & 0xff);?
??????? $byt[1] = ($val >> 8 & 0xff);?
??????? $byt[2] = ($val >> 16 & 0xff);?
??????? $byt[3] = ($val >> 24 & 0xff);?
??????? return $byt;?
??? }?
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/**?
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* 從字節(jié)數(shù)組中指定的位置讀取一個(gè)Integer類型的數(shù)據(jù)?
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* @param $bytes 字節(jié)數(shù)組?
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* @param $position 指定的開始位置?
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* @return 一個(gè)Integer類型的數(shù)據(jù)?
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*/
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??? public static function bytesToInteger($bytes, $position) {?
??????? $val = 0;?
??????? $val = $bytes[$position + 3] & 0xff;?
??????? $val
??????? $val |= $bytes[$position + 2] & 0xff;?
??????? $val
??????? $val |= $bytes[$position + 1] & 0xff;?
??????? $val
??????? $val |= $bytes[$position] & 0xff;?
??????? return $val;?
??? }?
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/**?
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*?轉(zhuǎn)換一個(gè)shor字符串為byte數(shù)組?
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* @param $byt 目標(biāo)byte數(shù)組?
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* @param $val 需要轉(zhuǎn)換的字符串?
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*?
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*/
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??? public static function shortToBytes($val) {?
??????? $byt = array();?
??????? $byt[0] = ($val & 0xff);?
??????? $byt[1] = ($val >> 8 & 0xff);?
??????? return $byt;?
??? }?
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/**?
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* 從字節(jié)數(shù)組中指定的位置讀取一個(gè)Short類型的數(shù)據(jù)。?
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* @param $bytes 字節(jié)數(shù)組?
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* @param $position 指定的開始位置?
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* @return 一個(gè)Short類型的數(shù)據(jù)?
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*/
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??? public static function bytesToShort($bytes, $position) {?
??????? $val = 0;?
??????? $val = $bytes[$position + 1] & 0xFF;?
??????? $val = $val
??????? $val |= $bytes[$position] & 0xFF;?
??????? return $val;?
??? }?
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}?
?>

以上就介紹了php字符串與byte字節(jié)數(shù)組轉(zhuǎn)化類示例，包括了方面的內(nèi)容，希望對(duì)PHP教程有興趣的朋友有所幫助。