Php text data paging (message book paging ). Many pages are introduced in mysq, but few pages are introduced in the text data table format, here, I will briefly introduce the following paging ideas: 1. paging in the message book 2. there are many paging articles in mysq, but few of them are introduced in the text data table format, here is a simple example of turning pages.
This article mainly introduces the following paging ideas:
1. paging of the message book
2. flip pages of text forums
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Page flip of the message book:
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This is the simplest page flip in a text data table.
Golbal file
Data. dat --- NOTE FILE USE
User. dat --- Forum File use
Data. dat
_______________________________________________________________________
[1] [POSTUSER] [TITLE] [MEM] [POSTTIME] [IP]
[2] [POSTUSER] [TITLE] [MEM] [POSTTIME] [IP]
[3] [POSTUSER] [TITLE] [MEM] [POSTTIME] [IP]
[4] [POSTUSER] [TITLE] [MEM] [POSTTIME] [IP]
[5] [POSTUSER] [TITLE] [MEM] [POSTTIME] [IP]
Note:
[1, 2, 3, 4, 5...] is added by myself for better understanding.
Index. php source :.
__________________________________________________
--- === BOF ==== ---
$ File = "data. dat"; // data file
If (file_exits ($ file) {// fault tolerance processing to prevent the existence of non-data files
$ Fp = fopen ($ file, "w + ");
Fclose ($ fp );
Unset ($ fp );
}
$ Listnumber = 20; // Number of Entries displayed per page
$ Fp = file ($ file); // read data to the content
$ Number = count ($ fp); // calculates the total data volume
$ Pagenumber = floor ($ number/$ listnumber) + 1;
If ($ number <1 ){
Print "no record at the moment, please leave a message ";
/* + -------------------------------- +
| Print the FORM or link to the table here |
| URL, |
+ -------------------------------- + */
} Else {
If (empty ($ _ POST ["page"]) {// this section IF... ELSE... it is written to ensure compatibility with the default php4.20 settings and prevent invalid global variables.
$ Page = 0; // because it is read from the data text, it is saved in the array and has an O subscript.
} Else {
$ Page = $ _ POST ["page"]
}
If ($ page <0 | $ page> pagenumber) {// when the page parameter jumps out of the total page or is smaller than the homepage (0), it is returned to the first page.
$ Page = 0;
}
$ Startnote = $ page * $ listnumber; // start recording location
$ Endnote = $ startnote + $ listnumber; // end record location
// For ($ int_a = $ startnote; $ int_a <$ endnote; $ int_a ++) {// sorting display is similar to ASC mode
Pirnt"
"For ($ int_a = $ endnote; $ int_a >=$ startnote; $ int_a --) {// sort display is similar to DESC mode$ Info = explode ("\ t", $ fp [$ int-a]); // cut data to obtain detailed data for each record. here we use a TAB key to separatePrint"
User: $ info [1] Title $ info [2]: $ info [3] Release date: $ info [4] IP: $ info [5] ";
}
$ Prevpage = $ page-1; // Number of pages on the previous PAGE
$ Nextpage = $ page + 1; // Number of pages on the next page
Print" |
Homepage
Previous Page
Next page
Last page
|
"; // You can directly add the page detection here, so that it is comfortable for others, but the effect is the same
// For example, the next page or
}
?>
--- ==== EOF ==== ---
In addition, many of them changed because PHP4.20 was used. for example, PHP_SELF has already used _ SERVER ["PHP_SELF "].
NLP mainly introduces the following paging ideas: 1. paging the message book 2 ,...
