PHP FILES读写

Question

我可以从/读取并写入同一文件吗？ 如果是这样，您能解释一下该怎么做吗

Answer 1

是的。

$file = "./test.txt"; 
// open file at the beginning.
$fh = fopen($file, 'r+'); 
//read the first line of the file. (advances pointer to the second line).
$contents = fread($fh); 
// modify contents.
$new_contents = str_replace("hello world", "hello", $contents); 
// make sure you're back at the 0 index.
fseek( $file, 0 );
// write
fwrite($fh, $new_contents); 
// close.
fclose($fh); 
// done!

Answer 2

在PHP 5中， file_put_contents是最简单的方法：

<?php
$file     = 'people.txt';
$current  = file_get_contents($file); // Open the file to get existing content
$current .= "John Smith\n";           // Append a new person to the file
file_put_contents($file, $current);   // Write the contents back to the file
?>

Answer 3

file_put_contents("write.txt",file_get_contents("read.txt"));

Answer 4

这里是一些文档。 您可以在那里看到可以在这些功能中使用的所有参数。

• http://www.php.net/manual/en/function.fopen.php
• http://www.php.net/manual/en/function.fread.php
• http://www.php.net/manual/en/function.fclose.php
• http://www.php.net/manual/en/function.fwrite.php
• http://www.php.net/manual/en/function.fseek.php