[英]echo out loop array, strange behaviour, php
我使用在网上找到的这段代码来输出链接。
<?php
$dir_open = opendir('.');
while(false !== ($filename = readdir($dir_open))){
if($filename != "." && $filename != ".."){
$link = "<a href='./$filename'> $filename </a><br />";
echo $link;
}
}
closedir($dir_open);
?>
现在,我想按字母顺序排序,因此我将其放入数组,进行排序并输出。 但是,我得到了一些奇怪的重复输出,结果比预期多100倍。 这里发生了什么?
<?php
$dir_open = opendir('./myfolder/');
while(false !== ($filename = readdir($dir_open))){
if($filename != "." && $filename != ".."){
$array[] = "<a href='./myfolder/'> $filename </a><br />";
sort($array, SORT_NATURAL);
foreach ($array as $key => $val) {
echo $val;
}
}
}
closedir($dir_open);
?>
完整的代码
<?php
$dir_open = opendir('./suburblist/');
while(false !== ($filename = readdir($dir_open))){
if($filename != "." && $filename != ".." && $filename != (preg_match('/\.html$/i', $filename))) {
$domfilename = preg_replace('/\\.[^.\\s]{3,4}$/', '', $filename);
$domfilename = str_replace("-", " ", "$domfilename");
$domfilename = ucwords("$domfilename");
$array[] = $domfilename;
}
}
sort($array, SORT_NATURAL);
foreach ($array as $val) {
echo "<a href='/suburblist/$filename'>$val </a>";
}
closedir($dir_open);
?>
您需要做的是:
// get all filenames in array
while (false !== ($filename = readdir($dir_open))){
if($filename != "." && $filename != ".."){
$array[] = $filename;
}
}
// sort array
sort($array, SORT_NATURAL);
// output values from array
foreach ($array as $val) {
echo "<a href='./myfolder/'> $val </a><br />";
}
两个变量更新:
// get all filenames in array
while (false !== ($filename = readdir($dir_open))){
if($filename != "." && $filename != ".."){
$array[] = ['name' => $filename, 'link' => 'another value'];
}
}
// sort array with custom function, as your array is multidimensional now:
usort(
$array,
function ($a, $b) { return strnatcmp($a['name'], $b['name']); }
);
// output values from array
foreach ($array as $val) {
echo "<a href='./myfolder/" . $val['link'] . "'>" . $val['name'] . "</a><br />";
}
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