(PHP 5 >= 5.5.11, PHP 7, PHP 8)
SplFileObject::fread — Read from file
$length
) : string|falseReads the given number of bytes from the file.
lengthThe number of bytes to read.
Returns the string read from the file 或者在失败时返回 false.
示例 #1 SplFileObject::fread() example
<?php
// Get contents of a file into a string
$filename = "/usr/local/something.txt";
$file = new SplFileObject($filename, "r");
$contents = $file->fread($file->getSize());
?>
注意:
Note that SplFileObject::fread() reads from the current position of the file pointer. Use SplFileObject::ftell() to find the current position of the pointer and SplFileObject::rewind() (or SplFileObject::fseek()) to rewind the pointer position.