请问如何将字节数组转换成图片？

     var data = "255,216,255,224,0,16,74,70,73,70,0,1,180,16,71,23,134,180,248,126,198,211,174,90,72,25,98,223,27,2,170,65,13,156,170,156,241,69,21,124,145,229,90,117,48,73,28,135,133,252,79,226,157,30,194,24,116,191,17,92,105,118,111,111,253,146,97,179,13,17,91,68,148,76,170,165,88,5,112,197,212,62,50,35,145,148,14,140,59,79,135,11,175,191,132,163,211,52,221,116,88,104,182,145,93,91,90,89,188,14,242,65,20,247,13,113,46,46,18,68,152,185,119,35,37,246,149,0,50,55,36,148,85,212,163,78,223,9,164,86,167,57,225,95,17,248,171,91,186,214,180,246,215,98,142,45,107,87,184,215,238,75,89,43,149,191,184,72,209,231,66,91,42,200,16,24,249,249,88,146,219,248,2,238,143,225,155,212,142,72,226,215,46,236,117,25,224,136,195,169,105,228,219,207,106,233,7,217,225,120,217,91,33,146,56,192,206,121,201,232,14,40,162,176,132,35,103,161,15,245,59,127,25,234,94,37,241,119,140,52,155,189,114,251,71,70,182,154,93,77,99,209,116,183,180,89,39,158,72,196,143,38,249,229,44,113,8,0,228,99,123,231,57,24,40,162,185,161,8,219,97,180,174,127,255,217";            
     var arr = data.Split(",".ToCharArray());            
     var img_bytes = new byte[arr.Length];           
     var pos = 0;            
     foreach (var s in arr)            
     {                
     img_bytes[pos] = Convert.ToByte(s);                
     ++pos;            
     }            
     var MS = new MemoryStream(img_bytes);            
     Bitmap image = new System.Drawing.Bitmap(MS);            
     this.pictureBox1.Image = image;

上边是c#的代码。但我不知道php里有没类似的。 上边的字节数据没发完。因为太长了。  
我把请求出来的图片存放成字节数组，请问php中有没有方法将一个字节数组转换回图片？

回复讨论(解决方案)

$data = "255,216,255,224,0,16,74,70,73,70,0,1,180,16,71,23,134,180,248,126,198,211,174,90,72,25,98,223,27,2,170,65,13,156,170,156,241,69,21,124,145,229,90,117,48,73,28,135,133,252,79,226,157,30,194,24,116,191,17,92,105,118,111,111,253,146,97,179,13,17,91,68,148,76,170,165,88,5,112,197,212,62,50,35,145,148,14,140,59,79,135,11,175,191,132,163,211,52,221,116,88,104,182,145,93,91,90,89,188,14,242,65,20,247,13,113,46,46,18,68,152,185,119,35,37,246,149,0,50,55,36,148,85,212,163,78,223,9,164,86,167,57,225,95,17,248,171,91,186,214,180,246,215,98,142,45,107,87,184,215,238,75,89,43,149,191,184,72,209,231,66,91,42,200,16,24,249,249,88,146,219,248,2,238,143,225,155,212,142,72,226,215,46,236,117,25,224,136,195,169,105,228,219,207,106,233,7,217,225,120,217,91,33,146,56,192,206,121,201,232,14,40,162,176,132,35,103,161,15,245,59,127,25,234,94,37,241,119,140,52,155,189,114,251,71,70,182,154,93,77,99,209,116,183,180,89,39,158,72,196,143,38,249,229,44,113,8,0,228,99,123,231,57,24,40,162,185,161,8,219,97,180,174,127,255,217";
$a = explode(',', $data);
file_put_contents('a.jfif', join('', array_map('chr', $a)));

你最好把数据弄全了