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为什么全局在函数中为空?

php

8

GorillaApe · 技术社区 · 15 年前

我有个奇怪的问题……

所有页面都只有此代码。全局$currentpage;为空,我不知道为什么…

<?php
$pager = $_PARAMS["this"];
$pages = 5;
$currentPage = 1;
$tst="ap";
$nearPages = 5;
//Prologic
?>
<div class="pager">
<?php
$nearPagesHalf = ($nearPages - 1) / 2;

drawNumbers(1, 1);
if ($currentPage - $nearPagesHalf <= 0) {

}

drawNumbers($pages, $pages);
?> 

    <?php

    function drawNumbers($from, $to) {
        global $currentPage;



        for ($i = $from; $i <= $to; $i++) {

            echo $currentPage;

            if ($i == $currentPage) {
    ?> <span class="pageNumbers current"><?= $i ?></span>

    <?php
            } else {
    ?>
                <a href="#">
                    <span class="pageNumbers"><?= $i ?></span>
                </a>
<?php
            }
        }
?>
    <?php
    }

    function drawDots($from, $to) {

    }
    ?>

</div>

问题

echo $currentPage; prints 1 
        function drawNumbers($from, $to) {
            global $currentPage;
           echo $currentPage; prints nothing

2 回复 | 直到 15 年前

1

21

zerkms 15 年前

global

2

3

Luke 15 年前

$currentPage global

drawNumbers( $currentPage, 1, 1 );

function drawNumbers($currentPage, $from, $to) {
// no need define $currentPage here since it's passed
}