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1 | <?php |
7350889b |
2 | |
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3 | /** |
35586184 |
4 | * strings.php |
5 | * |
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6 | * Copyright (c) 1999-2004 The SquirrelMail Project Team |
35586184 |
7 | * Licensed under the GNU GPL. For full terms see the file COPYING. |
8 | * |
9 | * This code provides various string manipulation functions that are |
10 | * used by the rest of the Squirrelmail code. |
11 | * |
12 | * $Id$ |
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13 | * @package squirrelmail |
35586184 |
14 | */ |
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15 | |
35586184 |
16 | /** |
17 | * SquirrelMail version number -- DO NOT CHANGE |
18 | */ |
19 | global $version; |
509fc585 |
20 | $version = '1.5.1 [CVS]'; |
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21 | |
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22 | /** |
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23 | * SquirrelMail internal version number -- DO NOT CHANGE |
24 | * $sm_internal_version = array (release, major, minor) |
25 | */ |
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26 | global $SQM_INTERNAL_VERSION; |
a959e855 |
27 | $SQM_INTERNAL_VERSION = array(1,5,1); |
87d8c725 |
28 | |
87d8c725 |
29 | /** |
30 | * There can be a circular issue with includes, where the $version string is |
31 | * referenced by the include of global.php, etc. before it's defined. |
32 | * For that reason, bring in global.php AFTER we define the version strings. |
33 | */ |
34 | require_once(SM_PATH . 'functions/global.php'); |
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35 | |
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36 | /** |
37 | * Wraps text at $wrap characters |
38 | * |
39 | * Has a problem with special HTML characters, so call this before |
40 | * you do character translation. |
41 | * |
42 | * Specifically, ' comes up as 5 characters instead of 1. |
43 | * This should not add newlines to the end of lines. |
8b096f0a |
44 | * |
45 | * @param string line the line of text to wrap, by ref |
46 | * @param int wrap the maximum line lenth |
47 | * @return void |
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48 | */ |
49 | function sqWordWrap(&$line, $wrap) { |
e842b215 |
50 | global $languages, $squirrelmail_language; |
51 | |
52 | if (isset($languages[$squirrelmail_language]['XTRA_CODE']) && |
53 | function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) { |
54 | if (mb_detect_encoding($line) != 'ASCII') { |
55 | $line = $languages[$squirrelmail_language]['XTRA_CODE']('wordwrap', $line, $wrap); |
56 | return; |
57 | } |
58 | } |
59 | |
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60 | ereg("^([\t >]*)([^\t >].*)?$", $line, $regs); |
61 | $beginning_spaces = $regs[1]; |
62 | if (isset($regs[2])) { |
63 | $words = explode(' ', $regs[2]); |
64 | } else { |
65 | $words = ''; |
66 | } |
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67 | |
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68 | $i = 0; |
69 | $line = $beginning_spaces; |
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70 | |
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71 | while ($i < count($words)) { |
72 | /* Force one word to be on a line (minimum) */ |
73 | $line .= $words[$i]; |
74 | $line_len = strlen($beginning_spaces) + strlen($words[$i]) + 2; |
75 | if (isset($words[$i + 1])) |
76 | $line_len += strlen($words[$i + 1]); |
77 | $i ++; |
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78 | |
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79 | /* Add more words (as long as they fit) */ |
80 | while ($line_len < $wrap && $i < count($words)) { |
81 | $line .= ' ' . $words[$i]; |
82 | $i++; |
83 | if (isset($words[$i])) |
84 | $line_len += strlen($words[$i]) + 1; |
85 | else |
86 | $line_len += 1; |
87 | } |
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88 | |
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89 | /* Skip spaces if they are the first thing on a continued line */ |
90 | while (!isset($words[$i]) && $i < count($words)) { |
91 | $i ++; |
92 | } |
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93 | |
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94 | /* Go to the next line if we have more to process */ |
95 | if ($i < count($words)) { |
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96 | $line .= "\n"; |
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97 | } |
98 | } |
99 | } |
100 | |
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101 | /** |
102 | * Does the opposite of sqWordWrap() |
8b096f0a |
103 | * @param string body the text to un-wordwrap |
104 | * @return void |
341abbd6 |
105 | */ |
106 | function sqUnWordWrap(&$body) { |
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107 | global $squirrelmail_language; |
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108 | |
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109 | if ($squirrelmail_language == 'ja_JP') { |
110 | return; |
111 | } |
112 | |
341abbd6 |
113 | $lines = explode("\n", $body); |
114 | $body = ''; |
115 | $PreviousSpaces = ''; |
116 | $cnt = count($lines); |
117 | for ($i = 0; $i < $cnt; $i ++) { |
118 | preg_match("/^([\t >]*)([^\t >].*)?$/", $lines[$i], $regs); |
119 | $CurrentSpaces = $regs[1]; |
120 | if (isset($regs[2])) { |
121 | $CurrentRest = $regs[2]; |
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122 | } else { |
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123 | $CurrentRest = ''; |
124 | } |
125 | |
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126 | if ($i == 0) { |
127 | $PreviousSpaces = $CurrentSpaces; |
128 | $body = $lines[$i]; |
129 | } else if (($PreviousSpaces == $CurrentSpaces) /* Do the beginnings match */ |
130 | && (strlen($lines[$i - 1]) > 65) /* Over 65 characters long */ |
131 | && strlen($CurrentRest)) { /* and there's a line to continue with */ |
132 | $body .= ' ' . $CurrentRest; |
133 | } else { |
134 | $body .= "\n" . $lines[$i]; |
135 | $PreviousSpaces = $CurrentSpaces; |
136 | } |
137 | } |
138 | $body .= "\n"; |
139 | } |
140 | |
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141 | /** |
142 | * If $haystack is a full mailbox name and $needle is the mailbox |
143 | * separator character, returns the last part of the mailbox name. |
8b096f0a |
144 | * |
145 | * @param string haystack full mailbox name to search |
146 | * @param string needle the mailbox separator character |
147 | * @return string the last part of the mailbox name |
66239b65 |
148 | */ |
149 | function readShortMailboxName($haystack, $needle) { |
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150 | |
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151 | if ($needle == '') { |
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152 | $elem = $haystack; |
153 | } else { |
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154 | $parts = explode($needle, $haystack); |
155 | $elem = array_pop($parts); |
156 | while ($elem == '' && count($parts)) { |
157 | $elem = array_pop($parts); |
158 | } |
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159 | } |
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160 | return( $elem ); |
66239b65 |
161 | } |
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162 | |
8b096f0a |
163 | /** |
164 | * Creates an URL for the page calling this function, using either the PHP global |
165 | * REQUEST_URI, or the PHP global PHP_SELF with QUERY_STRING added. |
166 | * |
167 | * @return string the complete url for this page |
168 | */ |
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169 | function php_self () { |
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170 | if ( sqgetGlobalVar('REQUEST_URI', $req_uri, SQ_SERVER) && !empty($req_uri) ) { |
171 | return $req_uri; |
43fdb2a4 |
172 | } |
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173 | |
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174 | if ( sqgetGlobalVar('PHP_SELF', $php_self, SQ_SERVER) && !empty($php_self) ) { |
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175 | |
176 | // need to add query string to end of PHP_SELF to match REQUEST_URI |
177 | // |
178 | if ( sqgetGlobalVar('QUERY_STRING', $query_string, SQ_SERVER) && !empty($query_string) ) { |
179 | $php_self .= '?' . $query_string; |
180 | } |
181 | |
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182 | return $php_self; |
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183 | } |
184 | |
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185 | return ''; |
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186 | } |
187 | |
188 | |
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189 | /** |
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190 | * Determines the location to forward to, relative to your server. |
191 | * This is used in HTTP Location: redirects. |
66239b65 |
192 | * If this doesnt work correctly for you (although it should), you can |
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193 | * remove all this code except the last two lines, and have it return |
194 | * the right URL for your site, something like: |
195 | * |
196 | * http://www.example.com/squirrelmail/ |
66239b65 |
197 | * |
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198 | * @return string the base url for this SquirrelMail installation |
66239b65 |
199 | */ |
200 | function get_location () { |
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201 | |
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202 | global $imap_server_type; |
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203 | |
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204 | /* Get the path, handle virtual directories */ |
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205 | if(strpos(php_self(), '?')) { |
206 | $path = substr(php_self(), 0, strpos(php_self(), '?')); |
207 | } else { |
208 | $path = php_self(); |
209 | } |
210 | $path = substr($path, 0, strrpos($path, '/')); |
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211 | if ( sqgetGlobalVar('sq_base_url', $full_url, SQ_SESSION) ) { |
212 | return $full_url . $path; |
213 | } |
214 | |
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215 | /* Check if this is a HTTPS or regular HTTP request. */ |
216 | $proto = 'http://'; |
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217 | |
66239b65 |
218 | /* |
219 | * If you have 'SSLOptions +StdEnvVars' in your apache config |
44827b4d |
220 | * OR if you have HTTPS=on in your HTTP_SERVER_VARS |
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221 | * OR if you are on port 443 |
222 | */ |
223 | $getEnvVar = getenv('HTTPS'); |
224 | if ((isset($getEnvVar) && !strcasecmp($getEnvVar, 'on')) || |
961ca3d8 |
225 | (sqgetGlobalVar('HTTPS', $https_on, SQ_SERVER) && !strcasecmp($https_on, 'on')) || |
226 | (sqgetGlobalVar('SERVER_PORT', $server_port, SQ_SERVER) && $server_port == 443)) { |
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227 | $proto = 'https://'; |
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228 | } |
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229 | |
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230 | /* Get the hostname from the Host header or server config. */ |
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231 | if ( !sqgetGlobalVar('HTTP_HOST', $host, SQ_SERVER) || empty($host) ) { |
232 | if ( !sqgetGlobalVar('SERVER_NAME', $host, SQ_SERVER) || empty($host) ) { |
233 | $host = ''; |
234 | } |
66239b65 |
235 | } |
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236 | |
66239b65 |
237 | $port = ''; |
238 | if (! strstr($host, ':')) { |
961ca3d8 |
239 | if (sqgetGlobalVar('SERVER_PORT', $server_port, SQ_SERVER)) { |
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240 | if (($server_port != 80 && $proto == 'http://') || |
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241 | ($server_port != 443 && $proto == 'https://')) { |
242 | $port = sprintf(':%d', $server_port); |
66239b65 |
243 | } |
244 | } |
245 | } |
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246 | |
8de7f698 |
247 | /* this is a workaround for the weird macosx caching that |
248 | causes Apache to return 16080 as the port number, which causes |
249 | SM to bail */ |
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250 | |
8de7f698 |
251 | if ($imap_server_type == 'macosx' && $port == ':16080') { |
252 | $port = ''; |
253 | } |
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254 | |
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255 | /* Fallback is to omit the server name and use a relative */ |
256 | /* URI, although this is not RFC 2616 compliant. */ |
257 | $full_url = ($host ? $proto . $host . $port : ''); |
258 | sqsession_register($full_url, 'sq_base_url'); |
259 | return $full_url . $path; |
66239b65 |
260 | } |
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261 | |
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262 | |
66239b65 |
263 | /** |
8b096f0a |
264 | * These functions are used to encrypt the password before it is |
265 | * stored in a cookie. The encryption key is generated by |
266 | * OneTimePadCreate(); |
267 | * |
268 | * @param string string the (password)string to encrypt |
269 | * @param string epad the encryption key |
270 | * @return string the base64-encoded encrypted password |
66239b65 |
271 | */ |
272 | function OneTimePadEncrypt ($string, $epad) { |
273 | $pad = base64_decode($epad); |
274 | $encrypted = ''; |
275 | for ($i = 0; $i < strlen ($string); $i++) { |
276 | $encrypted .= chr (ord($string[$i]) ^ ord($pad[$i])); |
277 | } |
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278 | |
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279 | return base64_encode($encrypted); |
280 | } |
281 | |
8b096f0a |
282 | /** |
283 | * Decrypt a password from the cookie, encrypted by OneTimePadEncrypt. |
284 | * This uses the encryption key that is stored in the session. |
285 | * |
286 | * @param string string the string to decrypt |
287 | * @param string epad the encryption key from the session |
288 | * @return string the decrypted password |
289 | */ |
66239b65 |
290 | function OneTimePadDecrypt ($string, $epad) { |
291 | $pad = base64_decode($epad); |
292 | $encrypted = base64_decode ($string); |
293 | $decrypted = ''; |
294 | for ($i = 0; $i < strlen ($encrypted); $i++) { |
295 | $decrypted .= chr (ord($encrypted[$i]) ^ ord($pad[$i])); |
296 | } |
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297 | |
66239b65 |
298 | return $decrypted; |
299 | } |
9374671f |
300 | |
9374671f |
301 | |
66239b65 |
302 | /** |
303 | * Randomize the mt_rand() function. Toss this in strings or integers |
304 | * and it will seed the generator appropriately. With strings, it is |
305 | * better to get them long. Use md5() to lengthen smaller strings. |
8b096f0a |
306 | * |
307 | * @param mixed val a value to seed the random number generator |
308 | * @return void |
66239b65 |
309 | */ |
310 | function sq_mt_seed($Val) { |
4deb32f1 |
311 | /* if mt_getrandmax() does not return a 2^n - 1 number, |
312 | this might not work well. This uses $Max as a bitmask. */ |
66239b65 |
313 | $Max = mt_getrandmax(); |
f1ca21bd |
314 | |
66239b65 |
315 | if (! is_int($Val)) { |
66239b65 |
316 | $Val = crc32($Val); |
66239b65 |
317 | } |
f1ca21bd |
318 | |
66239b65 |
319 | if ($Val < 0) { |
320 | $Val *= -1; |
321 | } |
f1ca21bd |
322 | |
66239b65 |
323 | if ($Val = 0) { |
324 | return; |
325 | } |
f1ca21bd |
326 | |
66239b65 |
327 | mt_srand(($Val ^ mt_rand(0, $Max)) & $Max); |
328 | } |
9374671f |
329 | |
9374671f |
330 | |
66239b65 |
331 | /** |
332 | * This function initializes the random number generator fairly well. |
333 | * It also only initializes it once, so you don't accidentally get |
334 | * the same 'random' numbers twice in one session. |
8b096f0a |
335 | * |
336 | * @return void |
66239b65 |
337 | */ |
338 | function sq_mt_randomize() { |
66239b65 |
339 | static $randomized; |
f1ca21bd |
340 | |
66239b65 |
341 | if ($randomized) { |
342 | return; |
343 | } |
f1ca21bd |
344 | |
66239b65 |
345 | /* Global. */ |
961ca3d8 |
346 | sqgetGlobalVar('REMOTE_PORT', $remote_port, SQ_SERVER); |
347 | sqgetGlobalVar('REMOTE_ADDR', $remote_addr, SQ_SERVER); |
66239b65 |
348 | sq_mt_seed((int)((double) microtime() * 1000000)); |
961ca3d8 |
349 | sq_mt_seed(md5($remote_port . $remote_addr . getmypid())); |
f1ca21bd |
350 | |
66239b65 |
351 | /* getrusage */ |
352 | if (function_exists('getrusage')) { |
4deb32f1 |
353 | /* Avoid warnings with Win32 */ |
66239b65 |
354 | $dat = @getrusage(); |
355 | if (isset($dat) && is_array($dat)) { |
821a8e9c |
356 | $Str = ''; |
357 | foreach ($dat as $k => $v) |
66239b65 |
358 | { |
359 | $Str .= $k . $v; |
360 | } |
821a8e9c |
361 | sq_mt_seed(md5($Str)); |
66239b65 |
362 | } |
363 | } |
f1ca21bd |
364 | |
961ca3d8 |
365 | if(sqgetGlobalVar('UNIQUE_ID', $unique_id, SQ_SERVER)) { |
366 | sq_mt_seed(md5($unique_id)); |
0b97a708 |
367 | } |
f1ca21bd |
368 | |
66239b65 |
369 | $randomized = 1; |
370 | } |
371 | |
8b096f0a |
372 | /** |
373 | * Creates an encryption key for encrypting the password stored in the cookie. |
374 | * The encryption key itself is stored in the session. |
375 | * |
376 | * @param int length optional, length of the string to generate |
377 | * @return string the encryption key |
378 | */ |
66239b65 |
379 | function OneTimePadCreate ($length=100) { |
380 | sq_mt_randomize(); |
f1ca21bd |
381 | |
66239b65 |
382 | $pad = ''; |
383 | for ($i = 0; $i < $length; $i++) { |
384 | $pad .= chr(mt_rand(0,255)); |
385 | } |
f1ca21bd |
386 | |
66239b65 |
387 | return base64_encode($pad); |
388 | } |
9374671f |
389 | |
66239b65 |
390 | /** |
8b096f0a |
391 | * Returns a string showing the size of the message/attachment. |
392 | * |
393 | * @param int bytes the filesize in bytes |
394 | * @return string the filesize in human readable format |
66239b65 |
395 | */ |
396 | function show_readable_size($bytes) { |
397 | $bytes /= 1024; |
398 | $type = 'k'; |
f1ca21bd |
399 | |
66239b65 |
400 | if ($bytes / 1024 > 1) { |
401 | $bytes /= 1024; |
e5f1e71c |
402 | $type = 'M'; |
66239b65 |
403 | } |
f1ca21bd |
404 | |
66239b65 |
405 | if ($bytes < 10) { |
406 | $bytes *= 10; |
407 | settype($bytes, 'integer'); |
408 | $bytes /= 10; |
409 | } else { |
410 | settype($bytes, 'integer'); |
411 | } |
f1ca21bd |
412 | |
66239b65 |
413 | return $bytes . '<small> ' . $type . '</small>'; |
414 | } |
9374671f |
415 | |
66239b65 |
416 | /** |
417 | * Generates a random string from the caracter set you pass in |
418 | * |
8b096f0a |
419 | * @param int size the size of the string to generate |
420 | * @param string chars a string containing the characters to use |
421 | * @param int flags a flag to add a specific set to the characters to use: |
422 | * Flags: |
423 | * 1 = add lowercase a-z to $chars |
424 | * 2 = add uppercase A-Z to $chars |
425 | * 4 = add numbers 0-9 to $chars |
426 | * @return string the random string |
66239b65 |
427 | */ |
9374671f |
428 | |
66239b65 |
429 | function GenerateRandomString($size, $chars, $flags = 0) { |
430 | if ($flags & 0x1) { |
431 | $chars .= 'abcdefghijklmnopqrstuvwxyz'; |
432 | } |
433 | if ($flags & 0x2) { |
434 | $chars .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'; |
435 | } |
436 | if ($flags & 0x4) { |
437 | $chars .= '0123456789'; |
438 | } |
f1ca21bd |
439 | |
66239b65 |
440 | if (($size < 1) || (strlen($chars) < 1)) { |
441 | return ''; |
442 | } |
ff4f08ff |
443 | |
4deb32f1 |
444 | sq_mt_randomize(); /* Initialize the random number generator */ |
ff4f08ff |
445 | |
4deb32f1 |
446 | $String = ''; |
ff4f08ff |
447 | $j = strlen( $chars ) - 1; |
66239b65 |
448 | while (strlen($String) < $size) { |
ff4f08ff |
449 | $String .= $chars{mt_rand(0, $j)}; |
66239b65 |
450 | } |
ff4f08ff |
451 | |
66239b65 |
452 | return $String; |
453 | } |
9374671f |
454 | |
8b096f0a |
455 | /** |
456 | * Escapes special characters for use in IMAP commands. |
457 | * @param string the string to escape |
458 | * @return string the escaped string |
459 | */ |
fbb76d0e |
460 | function quoteimap($str) { |
ab1df059 |
461 | return preg_replace("/([\"\\\\])/", "\\\\$1", $str); |
66239b65 |
462 | } |
1899535f |
463 | |
66239b65 |
464 | /** |
8b096f0a |
465 | * Trims every element in the array, ie. remove the first char of each element |
466 | * @param array array the array to trim |
66239b65 |
467 | */ |
468 | function TrimArray(&$array) { |
469 | foreach ($array as $k => $v) { |
470 | global $$k; |
471 | if (is_array($$k)) { |
472 | foreach ($$k as $k2 => $v2) { |
473 | $$k[$k2] = substr($v2, 1); |
23d6bd09 |
474 | } |
66239b65 |
475 | } else { |
476 | $$k = substr($v, 1); |
23d6bd09 |
477 | } |
f1ca21bd |
478 | |
4deb32f1 |
479 | /* Re-assign back to array. */ |
66239b65 |
480 | $array[$k] = $$k; |
481 | } |
f1ca21bd |
482 | } |
23d6bd09 |
483 | |
8b096f0a |
484 | /** |
485 | * Returns a link to the compose-page, taking in consideration |
486 | * the compose_in_new and javascript settings. |
487 | * @param string url the URL to the compose page |
488 | * @param string text the link text, default "Compose" |
489 | * @return string a link to the compose page |
490 | */ |
21a957a9 |
491 | function makeComposeLink($url, $text = null, $target='') |
d62c4938 |
492 | { |
493 | global $compose_new_win,$javascript_on; |
494 | |
495 | if(!$text) { |
496 | $text = _("Compose"); |
497 | } |
498 | |
f72f61d8 |
499 | |
500 | // if not using "compose in new window", make |
501 | // regular link and be done with it |
d62c4938 |
502 | if($compose_new_win != '1') { |
21a957a9 |
503 | return makeInternalLink($url, $text, $target); |
d62c4938 |
504 | } |
505 | |
f72f61d8 |
506 | |
f72f61d8 |
507 | // build the compose in new window link... |
f72f61d8 |
508 | |
509 | |
510 | // if javascript is on, use onClick event to handle it |
d62c4938 |
511 | if($javascript_on) { |
512 | sqgetGlobalVar('base_uri', $base_uri, SQ_SESSION); |
513 | return '<a href="javascript:void(0)" onclick="comp_in_new(\''.$base_uri.$url.'\')">'. $text.'</a>'; |
514 | } |
515 | |
f72f61d8 |
516 | |
517 | // otherwise, just open new window using regular HTML |
d62c4938 |
518 | return makeInternalLink($url, $text, '_blank'); |
f72f61d8 |
519 | |
d62c4938 |
520 | } |
521 | |
f1ca21bd |
522 | /** |
8b096f0a |
523 | * sm_print_r($some_variable, [$some_other_variable [, ...]]); |
524 | * Debugging function - does the same as print_r, but makes sure special |
525 | * characters are converted to htmlentities first. This will allow |
526 | * values like <some@email.address> to be displayed. |
527 | * The output is wrapped in <pre> and </pre> tags. |
528 | * |
529 | * @return void |
530 | */ |
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531 | function sm_print_r() { |
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532 | ob_start(); // Buffer output |
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533 | foreach(func_get_args() as $var) { |
534 | print_r($var); |
535 | echo "\n"; |
536 | } |
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537 | $buffer = ob_get_contents(); // Grab the print_r output |
538 | ob_end_clean(); // Silently discard the output & stop buffering |
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539 | print '<pre>'; |
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540 | print htmlentities($buffer); |
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541 | print '</pre>'; |
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542 | } |
543 | |
3ecad5e6 |
544 | /** |
545 | * version of fwrite which checks for failure |
546 | */ |
547 | function sq_fwrite($fp, $string) { |
548 | // write to file |
549 | $count = @fwrite($fp,$string); |
550 | // the number of bytes written should be the length of the string |
551 | if($count != strlen($string)) { |
552 | return FALSE; |
553 | } |
554 | |
555 | return $count; |
556 | } |
557 | |
558 | |
559 | |
43fdb2a4 |
560 | $PHP_SELF = php_self(); |
ef1932a4 |
561 | ?> |