use*_*634 0 php storage if-statement
我将如何删除 .txt 文件中的行?但是保留第一个十行?
到目前为止,这是我的代码:
<?php
$hiScore = $_POST['hiScore'] ? $_POST['hiScore'] : 'not set';
$theInput = $_POST['theInput'] ? $_POST['theInput'] : 'not set';
$file = fopen('LeaderBoard.txt','a+');
fwrite($file, ' '.$hiScore.' - Score Name: '.$theInput.' '.PHP_EOL);
fclose($file);
$lines = file("LeaderBoard.txt");
natsort($lines);
$lines=array_reverse($lines);
file_put_contents("LeaderBoardScores.txt", implode("\n \n \n \n \n \n \n \n", $lines));
$handle = fopen("LeaderBoardScores.txt");
$output = '';
$i = 0;
while (($line = fgets($handle)) !== false) {
$output .= $line . "\n";
if ($i++ >= 10)
break;
}
fclose($handle);
file_put_contents($output, "Leader.txt");
?>
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我不确定如果 staments 在 PHP 中如何工作,但可能会检查文件,如果 lines = 10 以上不向文件发布任何内容?
该人看到的记分板:LeaderBoardScores.txt 应该只看到前 10 名
LeaderBoard.txt 是数据发布的地方,然后被排序供人们在 LeaderBoardScores.txt 中查看
您可以使用循环遍历每一行fgets()并在第 10 行之后跳出:
<?php
$handle = fopen($path_to_file);
$output = '';
$i = 0;
while (($line = fgets($handle)) !== false) {
$output .= $line . "\n";
if ($i++ >= 10)
break;
}
fclose($handle);
file_put_contents($output, $path_to_file);
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http://php.net/manual/en/function.fgets.php
In this case, while (($line = fgets($handle)) !== false) loops through the lines in the existing file one-at-a-time. $output collects the content of the lines. $i counts how many lines we've added to $output so far so we can stop (break) at the right time.