Php check date-PHP source code

Check date

1. [Code][PHP] code

 
 
 = 0 & $ timeArr [0] <= 23) & ($ timeArr [1]> = 0 & $ timeArr [1] <= 59) & ($ timeArr [2]> = 0 & $ timeArr [2] <= 59) return true; else return false ;} function DateDiff ($ date1, $ date2, $ unit = "") {// Time comparison function, returns the seconds, minutes, hours, or days of difference between two dates switch ($ unit) {case's ': $ pidend = 1; break; case' I ': $ pidend = 60; break; case 'H': $ pidend = 3600; break; case 'D': $ pidend = 86400; break; default: $ pidend = 86400;} $ time1 = strtotime ($ date1); $ time2 = strtotime ($ date2); if ($ time1 & $ time2) return (float) ($ time1-$ time2)/$ pidend; return false ;}?> PHP redirection
 Window. location = "$ PHP_SELF ";"; Method 3: echo"
 ";?> Obtain the visitor's browser
 Obtain the visitor's operating system
 File format
 'Image/GIF', 'jpg '=> 'image/jpeg', 'jpeg '=> 'image/jpeg', 'jpe '=> 'image/jpeg ', 'bmp '=> 'image/bmp', 'PNG '=> 'image/png', 'tif '=> 'image/tiff ', 'Tiff '=> 'image/tiff', 'pict' => 'image/x-pict', 'Pic '=> 'image/x-pict ', 'pct '=> 'image/x-pict', 'tif' => 'image/tiff ', 'Tiff' => 'image/tiff ', 'psd '=> 'image/x-photoshop', 'swf '=> 'application/x-shockwave-Flash ', 'js' => 'application/x-Forwarded Cr limit pt', 'PDF '=> 'AP Plication/pdf ', 'Ps' => 'application/postscr limit pt', 'eps' => 'application/postscr limit pt ', 'AI' => 'application/postscr reject pt', 'WMF '=> 'application/x-msmetafile', 'css' => 'text/css ', 'htm '=> 'text/html', 'html' => 'text/html', 'txt' => 'text/plain ', 'xml' => 'text/XML', 'wml' => 'text/wml', 'wbmp '=> 'image/vnd. wap. wbmp ', 'mid' => 'audio/midi ', 'wav' => 'audio/wav ', 'mp3' => 'audio/mpeg ', 'mp2' => 'audio/mpeg ', 'Av' => 'Video/x-msvideo', 'MPEG '=> 'video/mpeg', 'mpg' => 'video/mpeg ', 'qt '=> 'video/quicktime', 'mov' => 'video/quicktime', 'lha' => 'application/x-lha ', 'lzh '=> 'application/x-lha', 'Z' => 'application/x-compress ', 'gtar' => 'application/x-gtar ', 'gz '=> 'application/x-gzip', 'gzip '=> 'application/x-gzip', 'tgz' => 'application/x-gzip ', 'tar '=> 'application/x-tar', 'bz2' => 'application/bzip2', 'Zip' => 'AP Plication/zip ', 'arj' => 'application/x-arj', 'rar' => 'application/x-rar-compressed ', 'hqx' => 'application/mac-binhex40 ', 'sit' => 'application/x-stuffit ', 'bin' => 'application/x-macbinary ', 'uu '=> 'text/x-uencode', 'uue' => 'text/x-uuencode', 'latex '=> 'application/x-latex ', 'ltx '=> 'application/x-latex', 'tcl '=> 'application/x-tcl', 'pgp '=> 'application/pgp ', 'asc '=> 'application/pgp', 'exe '=> 'app Lication/x-msdownload ', 'Doc' => 'application/msword', 'rtf' => 'application/rtf ', 'XLS' => 'application/vnd. ms-excel ', 'ppt' => 'application/vnd. ms-powerpoint ', 'mdb' => 'application/x-msaccess', 'wri' => 'application/x-mswrite',);?> Php excel file generation
 A simple example of time comparison: for example, a forum uses the new image to mark the posts posted on the day. Method 1:
 Rows [$ I] [date] is the datetime field value in the database. $ today = time (); $ theDay = date ("Y-m-d H: I: s", $ today-24*3600 ); $ newTag = $ db-> rows [$ I] [date]> = $ theDay? "": ""; // Method 2: $ newTag = $ db-> rows [$ I] [date]> = date ("Y-m-d 00:00:00 ")? "": "";?> // Extract the variables submitted by the page and browser, which is equivalent to enabling PHP. INI to enable global variables.
 // Read the file function
 // File writing function
 // Quick page redirection
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N "; print"N"; Exit;?> Generate random string functions
 Truncate a string of a certain length (this function is valid for GB2312)
 $ Length) {if ($ sss) {$ length = $ length-3; $ addstr = @#... ;}for ($ I = 0; $ I <$ length; $ I ++) {if (ord ($ string [$ I])> 127) {$ wordscut. = $ string [$ I]. $ string [$ I + 1]; $ I ++;} else {$ wordscut. = $ string [$ I];} return $ wordscut. $ addstr;} return $ string ;}?> Obtain the client IP address
 Determine email address
 Paging (use with two functions)
 ". $ Totalpage ."Page "; $ linkNum = 4; $ start = ($ page-round ($ linkNum/2)> 0? ($ Page-round ($ linkNum/2): "1"; $ end = ($ page + round ($ linkNum/2) <$ totalpage? ($ Page + round ($ linkNum/2): $ totalpage; $ prestart = $ start-1; $ nextend = $ end + 1; if ($ page <> 1) $ out. = "first page"; if ($ start> 1) $ out. = ".. <"; for ($ t = $ start; $ t <= $ end; $ t ++) {$ out. = ($ page = $ t )? "[". $ T."]":" $ T ";} if ($ end <$ totalpage) $ out. = "> .. "; if ($ page <> $ totalpage) $ out. = "Last page"; return $ out;}?> Obtain the ID of the newly inserted data
 // Obtain the current script URL
 // Convert the fullwidth number into a halfwidth number
 // Remove HTML tags
 ","> ", $ Txt); $ txt = preg_replace ("/[rn] {1,}/isU "," rn ", $ txt ); return $ txt ;}?> // Convert relative paths to absolute paths
 // Get all links
 ] *> ([^>] +)/I ', $ code, $ arr); return array ('name' => $ arr [2], 'URL' => $ arr [1]) ;}?> // Convert each line of the HTML table into an array in CSV format
 ] *?> 'Si ", '"', $ table); $ table = str_replace ("", '",', $ Table); $ table = str_replace (""," {Tr} ", $ table); // remove the HTML tag $ table = preg_replace (" '<[/!] *? [^ <>] *?> 'Si "," ", $ table); // remove the blank character $ table = preg_replace (" '([rn]) [s] + '","", $ table); $ table = str_replace ("", "", $ table); $ table = str_replace ("", "", $ table ); $ table = explode (", {tr}", $ table); array_pop ($ table); return $ table ;}?> // Convert each row and column of an HTML table into an array to collect table data
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] *?> 'Si "," ", $ table); $ table = str_replace (""," {Tr} ", $ table); $ table = str_replace (""," {Td} ", $ table); // remove the HTML tag $ table = preg_replace (" '<[/!] *? [^ <>] *?> 'Si "," ", $ table); // remove the blank character $ table = preg_replace (" '([rn]) [s] + '","", $ table); $ table = str_replace ("", "", $ table); $ table = str_replace ("", "", $ table ); $ table = explode ('{tr}', $ table); array_pop ($ table); foreach ($ table as $ key => $ tr) {$ td = explode ('{td}', $ tr); array_pop ($ td); $ td_array [] = $ td;} return $ td_array;}?> // Return all words in the string $ distinct = true to remove duplicates
   // Print out a list of people contributing to this PHP project