Add some common PHP functions to favorites

It is convenient to make php programs later and you can use them directly. In fact, some good functions are available in some mature cms systems, such as dedecms, Empire cms, and phpcms, both gb2312 and utf8 are supported. It is convenient to make php programs later and you can use them directly. In fact, some good functions are available in some mature cms systems, such as dedecms, Empire cms, and phpcms, both gb2312 and utf8 are supported.

 = 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: $ pide Nd = 86400 ;}$ time1 = strtotime ($ date1); $ time2 = strtotime ($ date2); if ($ time1 & $ time2) return (float) ($ time1-$ time2)/$ pidend; return false ;}?>

PHP redirection

Method 1: header ("Location: index. php"); Method 2: echo"
 
  
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-javascrīpt', 'pdf' => 'application/pdf', 'ps' => 'application/postscrīpt', 'eps' => 'application/postscrīpt', 'ai' => 'application/postscrīpt', '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', 'avi' => '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' => 'application/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-uuencode', 'uue' => 'text/x-uuencode', 'latex'=> 'application/x-latex', 'ltx' => 'application/x-latex', 'tcl' => 'application/x-tcl', 'pgp' => 'application/pgp', 'asc' => 'application/pgp', 'exe' => 'application/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

Time comparison problems
For example, a forum marks a post posted on the day with a new image.
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

 NNPage turning ....N "; print"
 N "; print"N "; print"NN "; print"
 
 
  
  
N "; print"
  
  
     N "; print" 
    N "; print" 
   N "; print" 
   
     N "; print" 
    N "; print" 
   N "; print" 
   
     N "; print" 
    N "; print" 
   N "; print" 
  
 
   
 
N "; print" 
     
       N "; print" 
      
         N "; print" 
        N "; print" 
       N "; print" 
       
         N "; print" 
        N "; print" 
       N "; print" 
       
         N "; print" 
        N "; print" 
       N "; print"N "; print" 
      
 
       
Page redirection prompt information
$ Info
N "; print" if your browser does not support automatic jump, click here
 
     
 
 
 
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

 ] *?> 'Si "," ", $ table); $ table = preg_replace ("'
 
  
] *?> 'Si "," ", $ table); $ table = preg_replace ("'
  
   
] *?> '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