如何在PHP中访问循环外的for循环变量? - How can I access the for-loop variable outside the loop in PHP?

How can I access the for-loop variable outside the loop in PHP?

本文关键字：循环变量 for 访问 PHP | 更新日期: 2023-09-26

我在PHP中有一个for循环，并希望访问循环外的$f变量。有特定的方法可以做到这一点吗?我寻找答案，但找不到正确的。

foreach($dirlist as $f) {
}
filemtime($f)

更新:

我只是用了更简单的方法，最后这样做:

date('M d, Y', filemtime(getcwd().'/index.php'))

将您的filemtime结果添加到新的数组中，并根据文件名检索最后修改的日期。

<?php
// Array of modified dates, file names as keys
$modifiedDates = array();
foreach($dirlist as $f) {
  $modifiedDates[basename($f)] = filemtime($f);
}
// File name to look modified time again (just file name, no path)
// basename function gets file name from path
$filename = basename( $pathToFile );
$lastModified = $modifiedDates[$filename];
?>
<p class="post-info">This article was last reviewed on <?php echo '<time itemprop="dateModified" datetime="'.date('Y-m-d', $lastModified).'">'. date('M d, Y', $lastModified).'</time>'; ?></p>

考虑以下伪代码:

$yourMatchedFile = null;
foreach($dirlist as $f) {
    if($f is good enough!!) {
        $yourMatchedFile = $f;
        break;
    }
}
if(isset($yourMatchedFile)) {
     DoWhatever();
}