要从 PHP 中读取文件的最后一行，代码如下 -

$line = '';
$f = fopen('data.txt', 'r');
$cursor = -1;
fseek($f, $cursor, SEEK_END);
$char = fgetc($f);
//Trim trailing newline characters in the file
while ($char === "
" || $char === "\r") {
   fseek($f, $cursor--, SEEK_END);
   $char = fgetc($f);
}
//Read until the next line of the file begins or the first newline char
while ($char !== false && $char !== "
" && $char !== "\r") {
   //Prepend the new character
   $line = $char . $line;
   fseek($f, $cursor--, SEEK_END);
   $char = fgetc($f);
}
echo $line;

输出将是读取并显示文本文件的最后一行。

文本文件以读取模式打开，光标设置为指向-1，即最初没有任何内容。 ‘fseek’函数用于移动到文件末尾或最后一行。读取该行直到遇到换行符。之后，将显示读取的字符。