每天自动显示新行表单文本文件

Question

我有一个文本文件，我想每天从中读取一个新行，如何每天自动更新开始和结束值？

$start = 1; // array indexes are starting with zero

$end = 4;   // array indexes are starting with zero

$lines = file('test.txt'); // get lines of file as an array

for($i = $start; $i <= $end && $i < count($lines); $i++) {

    echo $lines[$i];

}

Answer 1

由于您必须为每个访问者读取文件以显示文本的第一行，因此您可以根据需要编写一些代码来修改文件。假设你有这个文件：2019-05-12This is line 1This is line 2This is line 3然后为每个访问者包含这件作品：$text = file('myfile.txt');&nbsp; &nbsp; &nbsp; // read file into array$date = $text[0];&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // get the last update date$now = date('Y-m-d',time());&nbsp; &nbsp; &nbsp;// today$show = 1;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;// 1 = first text line in array//if we need to updateif( $date !== $now ){&nbsp; &nbsp; &nbsp;$show = 2;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // 2 = we need a new line&nbsp; &nbsp; &nbsp;$text[0] = $now;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // set last update to today&nbsp; &nbsp; &nbsp;unset($text[1]);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // delete the old line&nbsp; &nbsp; &nbsp;// write back file without the deleted line&nbsp; &nbsp; &nbsp;file_put_contents('myfile.txt', implode("\n",$text);&nbsp;}echo $text[$show];没有测试代码，但你明白了