javascript - How to decode base64 encoded image with JS/PHP? (previously encoded with Actionscript) -

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i have image encoded base64, made actionscript function:

private static const base64_chars:string = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789+/=";  public static function encodebytearray(_arg1:bytearray):string {    var _local3:array;    var _local5:uint;    var _local6:uint;    var _local7:uint;    var _local2 = "";    var _local4:array = new array(4);    _arg1.position = 0;    while (_arg1.bytesavailable > 0) {         _local3 = new array();         _local5 = 0;         while ((((_local5 < 3)) && ((_arg1.bytesavailable > 0)))) {             _local3[_local5] = _arg1.readunsignedbyte();             _local5++;         };         _local4[0] = ((_local3[0] & 252) >> 2);         _local4[1] = (((_local3[0] & 3) << 4) | (_local3[1] >> 4));         _local4[2] = (((_local3[1] & 15) << 2) | (_local3[2] >> 6));         _local4[3] = (_local3[2] & 63);         _local6 = _local3.length;         while (_local6 < 3) {             _local4[(_local6 + 1)] = 64;             _local6++;         };         _local7 = 0;         while (_local7 < _local4.length) {             _local2 = (_local2 + base64_chars.charat(_local4[_local7]));             _local7++;         };     };     return (_local2); }

now i'm trying decode (with no success) string in js/php , have image. here actionscript decoding function:

public static function decodetobytearray(_arg1:string):bytearray{     var _local6:uint;     var _local7:uint;     var _local2:bytearray = new bytearray();     var _local3:array = new array(4);     var _local4:array = new array(3);     var _local5:uint;     while (_local5 < _arg1.length) {         _local6 = 0;         while ((((_local6 < 4)) && (((_local5 + _local6) < _arg1.length)))) {             _local3[_local6] = base64_chars.indexof(_arg1.charat((_local5 + _local6)));             _local6++;         };         _local4[0] = ((_local3[0] << 2) + ((_local3[1] & 48) >> 4));         _local4[1] = (((_local3[1] & 15) << 4) + ((_local3[2] & 60) >> 2));         _local4[2] = (((_local3[2] & 3) << 6) + _local3[3]);         _local7 = 0;         while (_local7 < _local4.length) {             if (_local3[(_local7 + 1)] == 64){                 break;             };             _local2.writebyte(_local4[_local7]);             _local7++;         };         _local5 = (_local5 + 4);     };     _local2.position = 0;     return (_local2); }

i tried convert decoding aactionscript function js i'm missing new bytearray(); don't know how manage that. need way decode encoded image string image. here sample base64 string of image, encoded "encodebytearray" function:

sample base64 encoded string

thanks help.

to output base64 image use format:

<img src="data:image/png;base64,abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789+/=" />

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