diff options
| author | Nathan Kinkade <nath@nkinka.de> | 2008-02-03 23:23:24 +0000 |
|---|---|---|
| committer | Nathan Kinkade <nath@nkinka.de> | 2008-02-03 23:23:24 +0000 |
| commit | d895b852a6e160496ffc760d46d3719a3d62ff86 (patch) | |
| tree | 52230bb04148197e8312e09b5c5273417e7a3be9 /lib/standard.lib.php | |
Initial checkin of nutridb.org and basic subversion directory structure
Diffstat (limited to 'lib/standard.lib.php')
| -rw-r--r-- | lib/standard.lib.php | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/lib/standard.lib.php b/lib/standard.lib.php new file mode 100644 index 0000000..503052e --- /dev/null +++ b/lib/standard.lib.php @@ -0,0 +1,112 @@ +<?php + +# this function will simply initialize a variable to +# an empty string unless it already has a value, in +# which case it will simply return the existing value +function initVar($var) { + + $var = empty($var) ? "" : $var; + return $var; + +} + +# this function will initialize a variable to an empty +# string unless it already has a value, in which case +# it will simply return the existing value ... the only +# diff. between this function and initVar() is that this +# fuction encodes HTML special characters and then echos +# the variable ... useful for initializing and printing +# a variable all in one step +function printVar($var) { + + $var = empty($var) ? "" : htmlspecialchars($var,ENT_QUOTES); + echo $var; + return true; + +} + +# create pagination, including a page navigation bar. the +# output should be fairly generic, enclosed in a div with +# a css class of 'paginationNav', and more or less suitable +# to be dropped into just about any page. +function getPagination($page = 1, $pageOffset, $uri , $paginationSql) { + + global $config, $db; + + # start with a blank page navigation menu + $pageNav = ""; + + # change special chars, particularly the & to the HTML entity + # so that browsers don't confuse it with an HTML entity. + $uri = htmlspecialchars($uri); + + # determine total number of records and pages + $db->SelectOne($paginationSql); + $totalRecords = $db->_row['rowCount']; + $totalPages = ceil($totalRecords / $config->_recordsPerPage); + + # if the total records are less than what we show per page, then + # just skip everything else below + if ( $totalRecords <= $config->_recordsPerPage ) { + $fromRecord = ($pageOffset + 1); + $pageNav .= <<<HTML + <br /> + <span style='font-size: xx-small;'>Displaying: $fromRecord to $totalRecords of $totalRecords results.</span> +HTML; + + return $pageNav; + } + + # either append the proper page with & or ? depending + # on whether the submitted URI already has a query + # string or not + if ( preg_match("/\?.+/", $uri) ) { + $uri = "$uri&"; + } else { + $uri = "$uri?"; + } + + # create the navigation menu + if ( $page > 1 ) { + $pagePrev = ($page - 1); + # if the previous page isn't also the first page, show a link for first page. + if ( $pagePrev != 1 ) { + $pageNav .= " <a href='{$uri}page=1' title='First Page'>[First] </a>\n"; + } + $pageNav .= " <a href='{$uri}page=$pagePrev' title='Page $pagePrev'>Prev</a>\n"; + } + + for ( $idx = 1; $idx <= $totalPages; $idx++ ) { + if ( $idx == $page ) { + $pageNav .= " <strong>$idx</strong> \n"; + } else { + $pageNav .= " <a href='{$uri}page=$idx' title='Page $idx'>$idx</a> \n"; + } + } + + if ( ($totalRecords - ($config->_recordsPerPage * $page)) > 0 ) { + $pageNext = ($page + 1); + $pageNav .= " <a href='{$uri}page=$pageNext' title='Page $pageNext'>Next</a>\n"; + # if the previous page isn't also the first page, show a link for first page. + if ( $pageNext != $totalPages ) { + $pageNav .= "<a href='{$uri}page=$totalPages' title='Last page'> [Last]</a> \n"; + } + } + + $fromRecord = ($pageOffset + 1); + if ( $page == $totalPages ) { + $toRecord = $totalRecords; + } else { + $toRecord = ($pageOffset + $config->_recordsPerPage); + } + + $pageNav .= <<<HTML + <br /> + <span style='font-size: xx-small;'>Displaying: $fromRecord to $toRecord of $totalRecords results.</span> +HTML; + + return $pageNav; + +} + +?> |