php的pack与unpack二进制数据如何与js中的二进制相互通讯?
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可以将二进制转成十六进制,然后再传给js进行处理,转成二进制,示例代码如下:
<?php $str = '回'; $bin = pack("C3", ord($str{0}), ord($str{1}), ord($str{2})); $hex = bin2hex($bin); echo $hex; ?> <script type="text/javascript"> function hexStringToArrayBuffer(hexString) { // remove the leading 0x hexString = hexString.replace(/^0x/, ''); // ensure even number of characters if (hexString.length % 2 != 0) { console.log('WARNING: expecting an even number of characters in the hexString'); } // check for some non-hex characters var bad = hexString.match(/[G-Z\s]/i); if (bad) { console.log('WARNING: found non-hex characters', bad); } // split the string into pairs of octets var pairs = hexString.match(/[\dA-F]{2}/gi); // convert the octets to integers var integers = pairs.map(function(s) { return parseInt(s, 16); }); var array = new Uint8Array(integers); console.log(array); return array.buffer; } let arrv=hexStringToArrayBuffer("<?=$hex?>"); var string = new TextDecoder().decode(arrv);//arraybuffer转字符串 console.log(string); var code = ('回').charCodeAt(0); // 1110xxxx var byte1 = 0xE0 | ((code >> 12) & 0x0F); // 10xxxxxx var byte2 = 0x80 | ((code >> 6) & 0x3F); // 10xxxxxx var byte3 = 0x80 | (code & 0x3F); console.group('Test chr: '); console.log("UTF-8编码:", byte1.toString(16).toUpperCase() + '' + byte2.toString(16).toUpperCase() + '' + byte3.toString(16).toUpperCase()); console.log("Unicode编码: ", code); console.groupEnd(); </script>