从字符串中检索字符实现翻页

<?php

$str = <<<EOF
    生命的力量|23
    我们的世界|45
    生命的活力|67
    力量的源泉|14
    生命|11
    热爱生命|12
    伟大的生命|15
EOF;

$arr = explode("\n", $str);
$word = $_REQUEST['word'];
$newarr = array();
if ($word) {
    foreach ($arr as $val) {
        if (strpos($val, $word) !== false) {
            $newarr[] = $val;
        }
    }
} else {
    $newarr = $arr;
}
$count = count($newarr);
$perpage = 2;
$page = intval($_GET['page']) > 0 ? intval($_GET['page']) : 1;
$start = ($page - 1) * $perpage;


$datalist = array_slice($newarr, $start, $perpage);
var_dump($datalist);


$mpurl = 'http://' . $_SERVER['HTTP_HOST'] . '/' . $_SERVER['SCRIPT_NAME'] . '?word=' . urlencode($word);

// 复杂点的分页
echo multi($count, $perpage, $page, $mpurl);

// 简单的分页
//$num = 0;
//if (isset($newarr[$start + $perpage])) {
//    $num = $perpage;
//}
//echo simplepage($num, $perpage, $page, $mpurl);


//discuz simplepage
function simplepage($num, $perpage, $curpage, $mpurl) {
    $return = '';
    $lang['next'] = '下一页';
    $lang['prev'] = '上一页';
    $next = $num == $perpage ? '<a href="' . $mpurl . '&amp;page=' . ($curpage + 1) . '" class="nxt">' . $lang['next'] . '</a>' : '';
    $prev = $curpage > 1 ? '<span class="pgb"><a href="' . $mpurl . '&amp;page=' . ($curpage - 1) . '">' . $lang['prev'] . '</a></span>' : '';
    if ($next || $prev) {
        $return = '<div class="pg">' . $prev . $next . '</div>';
    }
    return $return;
}
// discuz multi
function multi($num, $perpage, $curpage, $mpurl, $maxpages = 0, $page = 10, $autogoto = FALSE, $simple = FALSE) {
    global $_G;
    $ajaxtarget = '';
    $a_name = '';
    if (strpos($mpurl, '#') !== FALSE) {
        $a_strs = explode('#', $mpurl);
        $mpurl = $a_strs[0];
        $a_name = '#' . $a_strs[1];
    }
    $lang['next'] = '下一页';
    $lang['prev'] = '上一页';
   $dot = '...';
    
    $multipage = '';
    $mpurl .= strpos($mpurl, '?') !== FALSE ? '&amp;' : '?';

    $realpages = 1;
    
    $page -= strlen($curpage) - 1;
    if ($page <= 0) {
        $page = 1;
    }
    if ($num > $perpage) {

        $offset = floor($page * 0.5);

        $realpages = @ceil($num / $perpage);
        $pages = $maxpages && $maxpages < $realpages ? $maxpages : $realpages;

        if ($page > $pages) {
            $from = 1;
            $to = $pages;
        } else {
            $from = $curpage - $offset;
            $to = $from + $page - 1;
            if ($from < 1) {
                $to = $curpage + 1 - $from;
                $from = 1;
                if ($to - $from < $page) {
                    $to = $page;
                }
            } elseif ($to > $pages) {
                $from = $pages - $page + 1;
                $to = $pages;
            }
        }
       
        $multipage = ($curpage - $offset > 1 && $pages > $page ? '<a href="' . $mpurl . 'page=1' . $a_name . '" class="first"' . $ajaxtarget . '>1 ' . $dot . '</a>' : '') .
                ($curpage > 1 && !$simple ? '<a href="' . $mpurl . 'page=' . ($curpage - 1) . $a_name . '" class="prev"' . $ajaxtarget . '>' . $lang['prev'] . '</a>' : '');
        for ($i = $from; $i <= $to; $i++) {
            $multipage .= $i == $curpage ? '<strong>' . $i . '</strong>' :
                    '<a href="' . $mpurl . 'page=' . $i . ($ajaxtarget && $i == $pages && $autogoto ? '#' : $a_name) . '"' . $ajaxtarget . '>' . $i . '</a>';
        }
        $multipage .= ($to < $pages ? '<a href="' . $mpurl . 'page=' . $pages . $a_name . '" class="last"' . $ajaxtarget . '>' . $dot . ' ' . $realpages . '</a>' : '') .
                ($curpage < $pages && !$simple ? '<a href="' . $mpurl . 'page=' . ($curpage + 1) . $a_name . '" class="nxt"' . $ajaxtarget . '>' . $lang['next'] . '</a>' : '') ;

        $multipage = $multipage ? '<div class="pg">' . ($shownum && !$simple ? '<em>&nbsp;' . $num . '&nbsp;</em>' : '') . $multipage . '</div>' : '';
    }
    $maxpage = $realpages;
    return $multipage;
}

?>