Null

null.php

<?php
$n = 0;
$e = 0;
$A = [];

scan_all("/bin");
scan_all("/sbin");
scan_all("/usr/bin");
scan_all("/usr/sbin");
scan_all("/usr/local/bin");
scan_all("/usr/local/sbin");

echo "File: $path\n";
echo "Empty: " . number_format($e) . "B\n";
echo "Full: " . number_format($n - $e) . "B\n";
echo "Whole: " . number_format($n) . "B\n";
echo "Null Percentage: " . round($e / $n * 100) . "%\n";
echo "---------\n";
flush();

rsort($A);
for($i = 0; $i < count($A); $i++) {
 	echo "{$A[$i][1]}: " . round($A[$i][0] / $n * 100, 3) . "%\n";
}

function scan_all($path) {
	$files = array_diff(scandir($path), [".", ".."]);
	foreach($files as $i => $file) {
		if(is_dir("$path/$file"))
			scan_all("$path/$file");
		else
			count_bytes("$path/$file");
	}
}
function count_bytes($path) {
	global $n, $e, $A;
	$f = fopen($path, "rb");
	if(!$f)	return;
	while(!feof($f)) {
		$b = fread($f, 1);
		if(isset($A[ord($b)]))
			$A[ord($b)][0]++;
		else
			$A[ord($b)] = [1, ord($b)];
		$n++;
		if($b == "\0")
			$e++;
	}
	fclose($f);
}
?>

null.txt

Null:	  924,521,718 B
Full:	2,262,110,444 B
All:	3,186,632,162 B

Null Percentage:    29%

---------

Byte	Percentage
0:	29.013%
72:	3.621%
255:	3.302%
137:	1.936%
15:	1.61%
1:	1.595%
32:	1.56%
139:	1.414%
36:	1.182%
116:	1.045%
2:	1.009%
76:	0.966%
65:	0.936%
101:	0.93%
141:	0.919%
192:	0.85%
14:	0.795%
8:	0.774%
4:	0.712%
16:	0.704%
133:	0.703%
68:	0.702%
131:	0.7%
232:	0.66%
5:	0.649%
73:	0.649%
97:	0.618%
114:	0.604%
132:	0.604%
111:	0.602%
3:	0.594%
105:	0.581%
110:	0.58%
102:	0.573%
115:	0.562%
49:	0.525%
69:	0.509%
21:	0.502%
95:	0.493%
117:	0.487%
108:	0.476%
100:	0.456%
48:	0.423%
6:	0.411%
99:	0.406%
31:	0.404%
24:	0.404%
112:	0.4%
233:	0.396%
40:	0.394%
64:	0.36%
199:	0.343%
80:	0.334%
128:	0.331%
66:	0.326%
10:	0.324%
103:	0.324%
254:	0.32%
7:	0.306%
109:	0.286%
104:	0.285%
84:	0.283%
195:	0.283%
83:	0.282%
56:	0.28%
77:	0.279%
46:	0.276%
57:	0.269%
144:	0.264%
250:	0.256%
37:	0.256%
204:	0.245%
193:	0.242%
243:	0.242%
13:	0.24%
67:	0.238%
12:	0.236%
85:	0.234%
9:	0.232%
93:	0.226%
96:	0.226%
41:	0.224%
11:	0.223%
30:	0.214%
120:	0.212%
248:	0.211%
53:	0.209%
253:	0.206%
251:	0.203%
92:	0.201%
198:	0.199%
61:	0.199%
208:	0.198%
17:	0.198%
246:	0.196%
239:	0.194%
196:	0.194%
235:	0.193%
118:	0.192%
224:	0.189%
240:	0.188%
223:	0.187%
98:	0.185%
186:	0.184%
124:	0.182%
184:	0.178%
45:	0.178%
71:	0.178%
70:	0.175%
91:	0.173%
121:	0.173%
136:	0.172%
78:	0.166%
18:	0.165%
88:	0.163%
20:	0.163%
200:	0.162%
190:	0.16%
252:	0.159%
201:	0.158%
247:	0.154%
140:	0.153%
134:	0.153%
236:	0.152%
176:	0.151%
47:	0.149%
194:	0.149%
191:	0.149%
129:	0.147%
182:	0.147%
216:	0.146%
44:	0.145%
210:	0.143%
160:	0.141%
58:	0.141%
50:	0.14%
52:	0.139%
119:	0.139%
82:	0.137%
60:	0.137%
86:	0.135%
107:	0.135%
231:	0.131%
197:	0.128%
242:	0.125%
59:	0.124%
79:	0.124%
28:	0.12%
87:	0.119%
125:	0.119%
34:	0.119%
51:	0.118%
43:	0.118%
238:	0.117%
168:	0.116%
188:	0.115%
185:	0.114%
152:	0.113%
189:	0.113%
237:	0.112%
19:	0.112%
94:	0.112%
75:	0.112%
249:	0.111%
33:	0.109%
39:	0.109%
142:	0.108%
123:	0.107%
230:	0.106%
127:	0.104%
148:	0.103%
23:	0.103%
74:	0.102%
62:	0.101%
143:	0.101%
226:	0.101%
219:	0.101%
35:	0.098%
90:	0.098%
229:	0.098%
22:	0.097%
228:	0.096%
234:	0.095%
135:	0.095%
29:	0.094%
222:	0.093%
63:	0.093%
55:	0.093%
42:	0.092%
225:	0.091%
54:	0.091%
25:	0.091%
130:	0.09%
106:	0.09%
149:	0.09%
180:	0.089%
209:	0.088%
126:	0.087%
244:	0.087%
81:	0.087%
27:	0.086%
183:	0.086%
156:	0.086%
187:	0.085%
26:	0.085%
170:	0.085%
245:	0.085%
38:	0.084%
122:	0.084%
221:	0.082%
241:	0.081%
89:	0.081%
202:	0.08%
181:	0.08%
206:	0.077%
172:	0.077%
211:	0.077%
217:	0.076%
214:	0.075%
227:	0.075%
113:	0.074%
218:	0.074%
220:	0.073%
215:	0.072%
212:	0.072%
164:	0.071%
213:	0.069%
205:	0.069%
207:	0.068%
147:	0.067%
175:	0.067%
157:	0.066%
203:	0.065%
165:	0.064%
171:	0.064%
146:	0.063%
163:	0.061%
151:	0.061%
179:	0.061%
138:	0.06%
167:	0.06%
173:	0.06%
155:	0.059%
150:	0.059%
159:	0.058%
153:	0.058%
166:	0.058%
145:	0.057%
162:	0.056%
177:	0.056%
154:	0.056%
169:	0.055%
158:	0.055%
178:	0.054%
174:	0.054%
161:	0.053%